fig1 shows a preferred embodiment of the invention comprising a balloon 1 having a surface coating 2 of a photodynamic compound or composition , an inflation port 3 and a two - way valve ( not shown ) to enable the balloon to be selectively inflated and deflated . the balloon is preferably made from an elastomeric material , such as a flexible silicone polymer , and the coating is fixed to the balloon with linkage as described herein before . the balloon is attached to a first end of a catheter 4 . a second end of the catheter includes means for receiving a pressure controlled inflation device 5 , such as a standard luer pressure tight connector having a stopcock . the pressure controlled inflation device 5 is a normal syringe used in standard angioplastic and intraocular procedures with balloon catheters . the syringe has an accurate graduation for measuring the volume of fluid injected into the balloon . it may also be optionally fitted with a pressure gauge . in use , pressure and volume measurements enable the balloon to be fully inflated at the target site whilst reducing the risk of damaging the surrounding non - target healthy tissue . the first end of the catheter terminates in an injection means for filling the balloon with a filler material which is preferably a biocompatible fluid , such as sterile water . preferably the catheter includes a fluid delivery system ( not shown ) for delivering a desired medium to the coating 2 . a light source , preferably a fibre optic cable 6 , extends throughout the length of the catheter and into the interior of the balloon 1 terminating with means for distributing light 7 in the balloon . procedure for the treatment of atherosclerosis , restenosis , bladder cancers or endomnetrial ablation air is removed from the apparatus before commencing the surgical operation by connecting tie syringe , typically a 30 ml syringe , to the luer pressure tight connector , opening the stopcock and withdrawing the syringe piston . the stopcock is closed and the syringe removed . the apparatus is now ready for use . after the balloon has been presented to the target tissue 8 , a pressure controlled inflation device , preferably a30 ml syringe containing sterile water with no air bubbles and fitted with a pressure gauge , is attached to the luer fitting , the stopcock is opened and the balloon 1 inflated to a specific volume and / or pressure with the sterile water . the required volume / pressure for inflation of the balloon can be determined by routine trial and error testing by a skilled person . a light source is operated so that light of the appropriate wavelength , typically 500 to 800 nm , passes through the fibre optic cable into the interior of the balloon . the coating 2 absorbs the light and emits singlet oxygen radicals in the vicinity of the balloon , typically within a radius of between 50 nm and 5 μm from the balloon . the fluid delivery system may be used to deliver a desired fluid into the space 9 between the coating 2 and the target tissue 8 , thereby enabling the user to vary and control the distance the singlet oxygen species are emitted from the balloon 1 . the singlet oxygen radicals induce molecular and cellular destruction of the target tissue . the invention is further illustrated by way of the following examples . mass spectra were recorded on a finnigan mat tsq 700 triple quadrupole mass spectrometer equipped with an electrospray interface ( fab - ms ). the matrix - assisted laser desorption / ionization mass spectra of the porphyrins were obtained using a dithranol matrix . fab - ms spectra were obtained using a 3 - nitrobenzyl alcohol ( noba ) matrix . 1 h - nmr spectra were measured at 60 mhz on a jeol jnm - pmx60 spectrometer , at 270 mhz on a jeol ex 270 spectrometer and at 300 mhx on a varian gemini - 300 spectrometer in cdcl 3 using tms as an internal reference . ultraviolet / visible spectra of solutions of compounds in tetrahydrofuran ( thf ) or toluene were measured using a hitachi u - 3000 spectrophotometer or a ati - unicam uv - 2 spectrophotometer . reflectance - absorbance infra red ( rair ) spectra were recorded on a bio - rad fts 165 spectrophotometer . fluorescence emission spectra were recorded using a spex fluorolog 3 spectrophotometer at an excitation wavelength of 355 nm , emission at 550 to 800 nm , with a bandpass of 2 nm . column chromatography was carried out using silica gel 60 , 0 . 035 - 0 . 070 mm ( 220 - 440 mesh ) or silica gel 60 , 0 . 060 - 0 . 2mm ( 70 - 230 mesh ), both of which are available from bdh , poole , dorset , uk . the singlet oxygen quantum yields were determined by the direct measurement of singlet oxygen phosphorescence at 1270 nm . samples were excited using the third harmonic of a q - switched nd : yag ( neodymium : yttrium - aluminium - garnet ) spectra physics gcr - 150 - 10 laser , operating at an excitation wavelength of 355 nm . a small fraction of the laser output was passed through a solution state filter containing aqueous cobalt ( ii ) sulphate ( coso 4 ) to remove residual 532 and 1064 nm radiation and then down a 8 mm diameter liquid light guide ( oriel ). for the measurements the end of the light guide was held against a 1 cm × 1 cm fluorescence cuvette ( hellma ) holding the sample . during the course of the experiments the incident laser energy for each measurement was determined using a pyroelectric detector held behind the sample . this detector was calibrated at the start of the experiment using a second calibrated energy meter ( gentec ed100 ). the laser energy was adjusted by placing cells containing aqueous sodium nitrite between the coso 4 filter and the light guide . typical pulse energies used were in the range of 25 - 500 μj per pulse . shot to shot noise was estimated to be & lt ; 10 % and sets of 20 shots gave an average value within & lt ; 3 %. phosphorescence from the sample was collected and passed through an interference filter centred at 1270 nm available from ( infra red engineering ltd ) and then focused onto the active area of a liquid nitrogen cooled germanium photodiode ( north coast eo - 817p ). the output from this device was ac coupled to a digital oscilloscope ( tektronix tds - 320 ) which digitised and averaged the transients . typically 20 laser shots were used for each sample . the averaged data was transferred to a pc where it was stored and analysed . in the following examples , the title compounds of examples 2 to 8 represent compounds of formula v , the title compounds of examples 9 to 14 represent compounds of formula vi , vii and viii , the title compounds of examples 28 to 40 represent compounds of the formula iii , the title compounds of examples 54 to 66 represent compounds of formula ii and the title compounds of examples 67 to 81 represent compounds of formula i . 1 , 12 - dodecanediol ( 50 g , 0 . 25 mol ) in hydrogen bromide 48 % ( 220 ml ) was continuously extracted with petroleum ether ( b . p . 80 - 100 ° c .) ( 300 ml ) for 18 hours . the solvent was evaporated under reduced pressure and the crude oil obtained was filtered through a pad of silica gel . elution with petroleum ether ( b . p . 40 - 60 ° c .) gave a colourless fraction containing 1 , 12 - dibromododecane . the silica gel was then eluted with acetone to give the title compound as a pale yellow oil after evaporation of the solvent . the title compound crystallised upon cooling and was recrystallised from petroleum ether ( b . p . 40 - 60 ° c .). 1 h nmr ( 60 mhz ; cdcl 3 ): 3 . 62 ( t , 2h ), 3 . 42 ( t , 2h ), 1 . 4 ( brs , 21h ). a mixture of 12 - bromododecan - 1 - ol ( 15 g , 57 mmol , see example 1 above ), 4 - hydroxy - benzaldehyde ( 6 . 9 g , 57 mmol ), potassium carbonate ( excess ), potassium iodide ( trace ) and tetra - n - butylammonium iodide ( trace ) was heated at reflux in methyl ethyl ketone ( 50 ml ) for 16 hours . after cooling , the solids were filtered off and washed with acetone . the combined organic fractions were evaporated to dryness . diethyl ether was added to the resultant oil and the solution was stored at 4 ° c . the title compound precipitated and was collected by filtration . 1 h nmr ( 60 mhz ; cdcl 3 ): 9 . 9 ( s , 1h ), 7 . 9 ( d , 2h ), 7 . 0 ( d , 2h ), 4 . 1 ( t , 2h ), 3 . 62 ( t , 2h ), 1 . 3 ( brs , 21h ). the title compound was prepared according to the method described in example 2 above from 6 - bromohexan - 1 - ol . the title compound was obtained as an oil . 1 h nmr ( 60 mhz ; cdcl 3 ): 9 . 8 ( s , 1h ), 7 . 82 ( d , 2h ), 7 . 0 ( d , 2h ), 4 . 08 ( t , 2h ), 3 . 82 ( s , 1h ), 3 . 7 ( t , 2h ), 1 . 2 - 2 . 1 ( m , 8h ). to a stirred solution of 4 - hydroxy - benzaldehyde ( 0 . 24 g , 2mmol ) and 1 , 16 - dihydroxyhexadecane ( 0 . 51 g , 2 mmol ), triphenylphosphine ( 0 . 53 g , 2 mmol ) in dry thf ( 20 ml ) at − 15 ° c . under an argon atmosphere was added a solution of diisopropylazodicarboxylate ( 0 . 4 g , 2 mmol ) in dry thf ( 7 . 5 ml ) over a period of 40 minutes . the mixture was allowed to warm to room temperature overnight . the solvent was removed under reduced pressure , diethyl ether was added and the white solid formed was removed by filtration . the filtrate was evaporated to dryness and the residue purified by chromatography on a column of silica gel which was , eluted with petroleum ether ( b . p . 40 - 60 ° c . ): tetrahydrofuran ( thf ) ( 10 : 1 by volume ) to yield the title compound which was used directly without further purification . 1 h nmr ( 300 mhz ; cdcl 3 ): 9 . 83 ( s , 1h ), 7 . 85 ( d , 2h ), 6 . 95 ( d , 2h ), 4 . 05 ( t , 2h ), 3 . 6 ( t , 2h ), 1 . 2 - 1 . 9 ( m , 28h ). a mixture of 11 - bromoundec - 1 - ene ( 2 . 02 g ), 4 - hydroxy - benzaldehyde ( 1 . 06 g , 8 . 6 mmol ), potassium carbonate , potassium iodide and tetra - n - butylamomnium iodide was heated at reflux in methyl ethyl ketone ( 10 ml ) for 16 hours . after cooling , the solids were filtered off and washed with acetone . the combined organic fractions were evaporated to dryness . the crude product obtained was filtered through a pad of silica gel which was eluted with petroleum ether ( b . p . 40 - 60 ° c .) to remove the excess of bromoundecene . the silica gel was then eluted with acetone and the acetone fractions evaporated under reduced pressure to yield the title compound . 1 h nmr ( 60 mhz ; cdcl 3 ): 9 . 9 ( s , 1h ), 7 . 8 ( d , 2h ), 7 . 0 ( d , 2h ), 5 . 5 - 6 . 1 ( m , 1h ), 4 . 8 - 5 . 2 ( m , 2h ), 4 . 1 ( t , 2h ), 1 . 2 - 2 . 2 ( m , 16h ). 4 -( 12 - hydroxyl - dodecyloxy )- benzaldehyde ( 1 . 1 g , 3 . 6 mmol , see example 2 above ) was heated at reflux in acetic anhydride ( 15 ml ) for 90 minutes . after cooling , the solution was poured into water with stirring . the title compound formed as a precipitate which was collected by filtration , washed with water and dried . 1 h nmr ( 60 mhz ; cdcl 3 ): 9 . 82 ( s , 1h ), 7 . 8 ( d , 2h ), 7 . 0 ( d , 2h ), 4 . 0 ( t , 4h ), 2 . 02 ( s , 3h ), 1 . 3 ( brs , 20h ). the title compound was prepared according to the method described in example 6 from 4 -( 6 - hydroxy - hexyloxy )- benzaldehyde ( see example 3 above ). after addition of the reaction mixture to water , the title compound was obtained as a yellow oil . the oil was extracted with diethyl ether , the etheral extract was washed with aqueous k 2 co 3 , brine , and dried over mgso 4 , filtered and the solvent removed under reduced pressure . 1 h nmr ( 60 mhz ; cdcl 3 ): 9 . 9 ( s , 1h ), 7 . 82 ( d , 2h ), 7 . 0 ( d , 2h ), 4 . 1 ( t , 4h ), 2 . 02 ( s , 3h ), 1 . 2 - 2 . 1 ( m , 8h ). the title compound was prepared as described in example 6 from 4 -( 16 - hydroxy - hexadecyloxy )- benzaldehyde ( see example 4 above ). the title compound was obtained as an oil . 1 h nmr ( 270 mhz ; cdcl 3 ): 9 . 88 ( s , 1h ), 7 . 83 ( d , 2h , j = 8 . 6 hz ), 7 . 0 ( d , 2h , j = 8 . 6 hz ), 4 . 0 - 4 . 1 ( m , 4h ), 2 . 04 ( s , 3h ), 1 . 2 - 1 . 9 ( m , 38h ). a mixture of 3 , 4 , 5 - trihydroxy - benzaldehyde ( 3 g , 20 mmol ), 1 - bromodecane ( 20 ml , excess ), potassium carbonate ( excess ), potassium iodide ( trace ) and tetra - n - butylammonium iodide ( trace ) was heated at reflux in methyl ethyl ketone ( 60 ml ) for 16 hours . after cooling , the solid was collected by filtration and washed with acetone . the combined organic fractions were evaporated to yield an oil . the oil was filtered through a pad of silica gel . elution with petroleum ether ( b . p . 40 - 60 ° c .) gave bromodecane on evaporation of the solvent . the silica gel was then eluted with acetone to give the title compound , after evaporation of the solvent , as a pale yellow oil which was used without further purification . 1 h nmr ( 60 mhz ; cdcl 3 ): 9 . 8 ( s , 1h ), 7 . 1 ( s , 2h ), 4 . 1 ( brt , 6h ), 1 . 3 ( brs , 48h ), 0 . 9 ( t , 9h ). the title compound was prepared according to the method described in example 9 above from 1 - bromohexan and 3 , 4 , 5 - trihydroxy - benzaldehyde . 1 h nmr ( 60 mhz ; cdcl 3 ): 9 . 8 ( s , 1h ), 7 . 1 ( s , 2h ), 4 . 1 ( brt , 6h ), 1 . 3 ( brs , 24h ), 0 . 9 ( t , 9h ). the title compound was prepared according to the method as described in example 9 above from 1 - bromohexadecane and 3 , 4 , 5 - trihydroxy - benzaldehyde , except the reaction mixture was heated at reflux for 4 days . after cooling , the solid material was removed by filtration and the solid washed with dichloromethane . the combined organic extracts were evaporated under reduced pressure to yield the title compound which was recrystallised from dichloromethane - ethanol . 1 h nmr ( 300 mhz ; cdcl 3 ): 9 . 84 ( s , 1h ), 7 . 08 ( s , 2h ), 3 . 9 - 4 . 1 ( m , 6h ), 1 . 0 - 1 . 9 ( m , 42h ), 0 . 88 ( t , 9h ). the title compound was prepared according to the method described in example 9 above from 3 , 5 - dihydroxy - benzaldehyde and 1 - bromohexane . 1 h nmr ( 60 mhz ; cdcl 3 ): 9 . 9 ( s , 1h ), 7 . 0 ( m , 2h ), 6 . 7 ( m , 1h ), 4 . 0 ( t , 4h ), 1 . 1 - 2 . 0 ( m , 16h ), 0 . 9 ( t , 6h ). the title compound was prepared according to the method described in example 9 above from 1 - bromodecane and 3 , 5 - dihydroxy - benzaldehyde . 1 h nmr ( 60 mhz ; cdcl 3 ): 9 . 8 ( s , 1h ), 7 . 0 ( m , 2h ), 6 . 7 ( m , 1h ), 4 . 0 ( t , 4h ), 1 . 1 - 2 . 1 ( m , 32h ), 0 . 9 ( t , 6h ). the title compound was prepared according to the method described in example 9 above from 1 - bromohexadecane and 3 , 5 - dihydroxy - benzaldehyde . the solid reaction product was collected by filtration and washed with methyl ethyl ketone ( soxhlet ). the filtrate was evaporated under reduced pressure to give the title compound as a red oil which was crystallised from acetone . 1 h nmr ( 60 mhz ; cdcl 3 ): 9 . 9 ( s , 1h ), 7 . 0 ( m , 2h ), 6 . 7 ( m , 1h ), 4 . 0 ( t , 4h ), 1 . 0 - 2 . 0 ( m , 56h ), 0 . 9 ( t , 6h ). 3 , 4 , 5 - tridecyloxy - benzaldehyde ( 3 . 51 g , 6 mmol , see example 9 ) and acetic acid 12 -( 4 - formyl - phenoxy )- dodecyl ester ( 0 . 71 g , 2 mmol , see example 6 ) were heated in propionic acid ( 40 ml ) containing nitrobenzene ( 10 ml ) to 130 ° c . pyrrole ( 0 . 55 g , 8 mmol ) was added and the temperature was maintained at 130 ° c . for 3 hours . the solution was cooled and an excess of methanol was added . the resultant solution was kept at 4 ° c . overnight . a heavy dark oil which collected was separated by decantation of the supernatant . the oil was washed with methanol and purified by column chromatography on silica gel eluted with petroleum ether ( b . p . 40 - 60 ° c . ): thf ( 10 : 1 by volume ) to yield the title compound which was used without further purification . 1 h nmr ( 270 mhz ; cdcl 3 ): 8 . 86 - 8 . 94 ( m , 8h ), 8 . 1 ( d , j = 8 hz , 2h ), 7 . 42 ( s , 6h ), 7 . 27 ( d , j = 8 hz , 2h ), 4 . 29 ( brt , 8h ), 4 . 08 ( t , 14h ), 2 . 26 ( s , 3h ), 1 . 2 - 2 . 0 ( m , 164h ), 0 . 91 ( t , 9h ), 0 . 83 ( t , 18h ), − 2 . 79 ( s , 2h ). the title compound was prepared according to the method described in example 15 above from 3 , 4 , 5 - trihexyloxy - benzaldehyde ( see example 10 ), acetic acid 12 -( 4 - formyl - phenoxy )- dodecyl ester and pyrrole . 1 h nmr ( 270 mhz ; cdcl 3 ): 8 . 85 - 9 . 0 ( m , 8h ), 8 . 1 ( d , j = 8 hz , 2h ), 7 . 42 ( m , 6h ), 7 . 27 ( d , j = 8 hz , 2h ), 4 . 29 ( brt , 8h ), 4 . 08 ( t , 14h ), 2 . 05 ( s , 3h ), 1 . 2 - 2 . 0 ( m , 92h ), 0 . 98 ( t , 9h ), 0 . 85 ( t , 18h ), − 2 . 79 ( s , 2h ). the title compound was prepared according to the method described in example 15 above from 3 , 4 , 5 - trihexyloxy - benzaldehyde ( see example 10 ), acetic acid 6 -( 4 - formyl - phenoxy )- hexyl ester ( see example 7 ) and pyrrole . the title compound was prepared according to the method described in example 15 above from 3 , 4 , 5 - tridecyloxy - benzaldehyde ( see example 9 ) and acetic acid 6 -( 4 - formyl - phenoxy )- hexyl ester ( see example 7 ) and pyrrole . the title compound was prepared according to the method described in example 15 above from 3 , 4 , 5 - trihexadecyloxy - benzaldehyde ( see example 11 ), acetic acid 6 -( 4 - formyl - phenoxy )- hexyl ester ( see example 7 ) and pyrrole . the title compound was prepared according to the method described in example 15 above from 3 , 4 , 5 - trihexyloxy - benzaldehyde ( see example 10 ) acetic acid 12 -( 4 - formyl - phenoxy )- dodecyl ester ( see example 6 ) and pyrrole . the title compound was prepared according to the method described in example 15 above from 3 , 4 , 5 - trihexadecyloxy - benzaldehyde ( see example 11 ), acetic acid 12 -( 4 - formyl - phenoxy )- dodecyl ester ( see example 6 ) and pyrrole . the title compound was prepared according to the method described in example 15 above from 3 , 4 , 5 - tridecyloxy - benzaldehyde ( see example 9 ), acetic acid 16 -( 4 - formyl - phenoxy )- hexadecyl ester ( see example 8 ) and pyrrole . the title compound was prepared according to the method described in example 15 above from 3 , 4 , 5 - trihexadecyloxy - benzaldehyde ( see example 11 ), acetic acid 16 -( 4 - formyl - phenoxy )- hexadecyl ester ( see example 8 ) and pyrrole . the title compound was prepared according to the method described in example 15 above from 3 , 5 - dihexyloxy - benzaldehyde ( see example 12 ), acetic acid 12 -( 4 - formyl - phenoxy )- dodecyl ester ( see example 6 ) and pyrrole . the title compound was prepared according to the method described in example 15 above from 3 , 5 - didecyloxy - benzaldehyde ( see example 13 ), acetic acid 6 -( 4 - formyl - phenoxy )- hexyl ester ( see example 7 ) and pyrrole . the title compound was prepared according to the method described in example 24 above from 3 , 5 - didecyloxy - benzaldehyde ( see example 13 ), acetic acid 12 -( 4 - formyl - phenoxy )- dodecyl ester ( see example 6 ) and pyrrole . the title compound was prepared according to the method described in example 15 above from 3 , 5 - dihexadecyloxy - benzaldehyde ( see example 14 ), acetic acid 12 -( 4 - formyl - phenoxy )- dodecyl ester ( see example 6 ) and pyrrole . 5 -[ 4 -( 12 - acetyloxy - dodecyloxy )- phenyl ]- 10 , 15 , 20 - tris -( 3 , 4 , 5 - tridecyloxy - phenyl )- porphyrin ( see example 15 ) was heated to reflux in thf ( 10 ml ) and ethanolic naoh ( excess ) was added . when the reaction was complete as judged by thin layer chromatography , the solvent was evaporated under reduced pressure and the title compound was obtained by purification of the resultant residue by chromatography using a column of silica gel which was eluted with petroleum ether ( b . p . 40 - 60 ° c . ): thf ( 4 : 1 by volume ). 1 h nmr ( 270 mhz ; cdcl 3 ): 8 . 85 - 9 . 0 ( m , 8h ), 8 . 1 ( d , j = 8 hz , 2h ), 7 . 43 ( s , 6h ), 7 . 3 ( d , j = 8 hz , 2h ), 4 . 3 ( t , 8h ), 4 . 09 ( t , 12h ), 3 . 65 ( brt , 2h ), 1 . 2 - 2 . 05 ( m , 164h ), 0 . 91 ( t , 9h ), 0 . 84 ( t , 18h ), − 2 . 77 ( s , 2h ). the title compound was prepared according to the method described in example 28 above from 5 -[ 4 -( 12 - acetyloxy - dodecyloxy )- phenyl ]- 10 , 15 , 20 - tris -( 3 , 4 , 5 - trihexyloxy - phenyl )- porphyrin ( see example 16 ). 1 h nmr ( 270 mhz ; cdcl 3 ): 8 . 87 - 9 . 0 ( m , 8h ), 8 . 1 ( d , j = 8 hz , 2h ), 7 . 44 ( s , 6h ), 7 . 29 ( d , j = 8 hz , 2h ), 4 . 32 ( t , 6h ), 4 . 26 ( t , 2h ), 4 . 1 ( t , 12h ), 3 . 64 ( brt , 2h ), 1 . 2 - 2 . 1 ( m , 92h ), 1 . 0 ( t , 9h ), 0 . 88 ( t , 18h ), − 2 . 76 ( s , 2h ). the title compound was prepared according to the method described in example 28 above from 5 -[ 4 -( 6 - acetyloxy - hexyloxy )- phenyl ]- 10 , 15 , 20 - tris -( 3 , 4 , 5 - trihexyloxy - phenyl )- porphyrin ( see example 17 ). the title compound was prepared according to the method described in example 28 above from 5 -[ 4 -( 6 - acetyloxy - hexyloxy )- phenyl ]- 10 , 15 , 20 - tris -( 3 , 4 , 5 - tridecyloxy - phenyl )- porphyrin ( see example 18 ). 1 h nmr ( 270 mhz ; cdcl 3 ): 8 . 8 - 8 . 9 ( m , 8h ), 8 . 9 ( d , 2h , j = 8 . 25 hz ), 7 . 25 - 7 . 5 ( m , 8h ), 4 . 07 - 4 . 29 ( m , 20h ), 3 . 75 ( t , 2h ), 1 . 25 - 2 . 1 ( m , 152h ), 0 . 91 ( t , 9h ), 0 . 83 ( t , 18h ), − 2 . 75 ( s , 2h ). the title compound was prepared according to the method described in example 28 above from 5 -[ 4 -( 6 - acetyloxy - hexyloxy )- phenyl )- 10 , 15 , 20 - tris -( 3 , 4 , 5 - trihexadecyloxy - phenyl )- porphyrin ( see example 19 ). 1 h nmr ( 270 mhz ; cdcl 3 ): 8 . 86 - 8 . 94 ( m , 8h ), 8 . 1 ( d , 2h , j = 8 . 25 hz ), 7 . 43 ( s , 6h ), 7 . 27 ( d , 2h , j = 8 . 25 hz ), 4 . 29 ( m , 8h ), 4 . 08 ( t , 12h ), 3 . 74 ( t , 2h ), 1 . 0 - 2 . 0 ( m , 260h ) 0 . 9 ( t , 9h ), 0 . 88 ( t , 18h ), − 2 . 75 ( s , 2h ). the title compound was prepared according to the method described in example 28 above from 5 -[ 4 -( 12 - acetyloxy - dodecyloxy )- phenyl ]- 10 , 15 , 20 - tris -( 3 , 4 , 5 - trihexyloxy - phenyl )- porphyrin ( see example 20 ). 1 h nmr ( 270 mhz ; cdcl 3 ): 8 . 88 - 8 . 96 ( m , 8h ), 8 . 11 ( d , 2h , j = 8 . 6 hz ), 7 . 44 ( s , 6h ), 7 . 28 ( d , 2h , j = 8 . 6 hz ), 4 . 31 ( t , 6h ), 4 . 29 ( t , 2h ), 4 . 11 ( t , 12h ), 3 . 64 ( t , 2h ), 1 . 2 - 2 . 1 ( m , 92h ), 1 . 0 ( t , 9h ), 0 . 88 ( t , 18h ), − 2 . 76 ( s , 2h ). the title compound was prepared according to the method described in example 28 above from 5 -[ 4 -( 12 - acetyloxy - dodecyloxy )- phenyl ]- 10 , 15 , 20 - tris -( 3 , 4 , 5 - trihexadecyloxy - phenyl )- porphyrin ( see example 21 ). 1 h nmr ( 270 mhz ; cdcl 3 ): 8 . 83 - 8 . 91 ( m , 8h ), 8 . 07 ( d , 2h , j = 8 . 6 hz ), 7 . 39 ( s , 6h ), 7 . 25 ( d , 2h , j = 8 . 6 hz ), 4 . 2 - 4 . 3 ( m , 8h ), 4 . 06 ( t , 12h ), 3 . 63 ( t , 2h ), 1 . 0 - 2 . 0 ( m , 272h ), 0 . 8 - 0 . 97 ( m , 27h ), − 2 . 81 ( s , 2h ). the title compound was prepared according to the method described in example 28 above from 5 -[ 4 -( 16 - acetyloxy - hexadecyloxy )- phenyl ]- 10 , 15 , 20 - tris -( 3 , 4 , 5 - tridecyloxy - phenyl )- porphyrin ( see example 22 ). 1 h nmr ( 300 mhz ; cdcl 3 ): 8 . 86 - 9 . 0 ( m , 8h ), 8 . 1 ( d , 2h ), 7 . 42 ( s , 6h ), 7 . 28 ( d , 2h ), 4 . 3 ( t , 6h ), 4 . 26 ( t , 2h ), 4 . 08 ( t , 12h ), 3 . 61 ( t , 2h ), 1 . 2 - 2 . 1 ( m , 172h ), 0 . 8 - 1 . 0 ( m , 27h ), − 2 . 75 ( s , 2h ). the title compound was prepared according to the method described in example 28 above from 5 -( 4 ( 16 - acetyloxy - hexadecyloxy )- phenyl ]- 10 , 15 , 20 - tris -( 3 , 4 , 5 - trihexadecyloxy - phenyl )- porphyrin ( see example 23 ). 1 h nmr ( 300 mhz ; cdcl3 ): 8 . 85 - 9 . 0 ( m , 8h ), 8 . 1 ( d , 21h ), 7 . 42 ( s , 6h ), 7 . 28 ( d , 2h ), 4 . 3 ( t , 6h ), 4 . 26 ( t , 2h ), 4 . 08 ( t , 12h ), 3 . 6 ( t , 2h ), 1 . 2 - 2 . 1 ( m , 280h ), 0 . 8 - 0 . 9 ( m , 27h ), − 2 . 8 ( s , 2h ). the title compound was prepared according to the method described in example 28 above from 5 -[ 4 -( 12 - acetyloxy - dodecyloxy )- phenyl ]- 10 , 15 , 20 - tris ( 3 , 5 - dihexyloxy - phenyl )- porphyrin ( see example 24 ). 1 h nmr ( 270 mhz ; cdcl 3 ): 8 . 77 - 8 . 88 ( m , 8h ), 8 . 01 ( d , 2h , j = 8 . 6 hz ), 7 . 3 ( m , 6h ), 7 . 16 ( d , 2h , j = 8 . 6 hz ), 6 . 8 ( m , 3h ), 4 . 12 ( t , 2h ), 4 . 03 ( t , 12h ), 3 . 5 ( t , 2h ), 1 . 1 - 1 . 9 ( m , 68h ), 0 . 81 ( t , 18h ), − 2 . 88 ( s , 2h ). the title compound was prepared according to the method described in example 28 above from 5 -[ 4 -( 6 - acetyloxy - hexyloxy )- phenyl ]- 10 , 15 , 20 - tris ( 3 , 5 - didecyloxy - phenyl )- porphyrin ( see example 25 ). 1 h nmr ( 270 mhz ; cdcl 3 ): 8 . 82 - 8 . 93 ( m , 8h ), 8 . 07 ( d , 2h , j = 8 . 25 hz ), 7 . 34 ( m , 6h ), 7 . 3 ( d , 2h , j = 8 . 25 hz ), 6 . 86 ( m , 3h ), 4 . 24 ( t , 2h ), 4 . 09 ( t , 12h ), 3 . 73 ( m , 2h ), 1 . 1 - 2 . 1 ( m , 104h ), 0 . 82 ( m , 18h ), − 2 . 84 ( s , 2h ). the title compound was prepared according to the method described in example 28 above from 5 -[ 4 -( 12 - acetyloxy - dodecyloxy )- phenyl ]- 10 , 15 , 20 - tris -( 3 , 5 - didecyloxy - phenyl )- porphyrin ( see example 26 ). 1 h nmr ( 270 mhz ; cdcl 3 ): 8 . 76 - 8 . 86 ( m , 8h ), 8 . 01 ( d , 2h , j = 8 . 6 hz ), 7 . 28 ( m , 6h ), 7 . 16 ( d , 2h , j = 8 . 6 hz ), 6 . 79 ( m , 3h ), 4 . 13 ( t , 2h ), 4 . 02 ( t , 12h ), 3 . 5 ( t , 2h ), 1 . 1 - 1 . 9 ( m , 116h ), 0 . 75 ( t , 18h ), − 2 . 88 ( s , 2h ). the title compound was prepared according to the method described in example 28 above from 5 -[ 4 -( 12 - acetyloxy - dodecyloxy )- phenyl ]- 10 , 15 , 20 - tris -( 3 , 5 - dihexadecyloxy - phenyl )- porphyrin ( see example 27 ). 1 h nmr ( 270 mhz ; cdcl 3 ): 8 . 88 - 8 . 97 ( m , 8h ), 8 . 12 ( d , 2h , j = 8 . 6 hz ), 7 . 4 ( s , 6h ), 7 . 3 ( d , 2h , j = 8 . 6 hz ), 6 . 91 ( m , 3h ), 4 . 27 ( t , 2h ), 4 . 14 ( t , 12h ), 3 . 66 ( t , 2h ), 1 . 0 - 2 . 1 ( m , 188h ), 0 . 88 ( t , 18h ), − 2 . 78 ( s , 2h ). 5 -[ 4 -( 12 - hydroxy - dodecyloxy )- phenyl ]- 10 , 15 , 20 - tris -( 3 , 4 , 5 - tridecyloxy - phenyl )- porphyrin ( 0 . 193 g , 86 mmol , see example 28 ) was dissolved in dichloromethane ( 8 ml ) and the solution was maintained at ambient temperature using a water bath . triethylamine ( 1 ml ) was added , followed by methanesulphonylchloride ( 20 drops ). the reaction mixture was stirred for 1 hour at ambient temperature . the solution was washed with dilute aqueous hydrochloric acid and brine , the organic extract dried over ( mgso 4 ), filtered and the solvent removed by evaporation at reduced pressure . column chromatography on silica gel eluted with petroleum ether ( b . p . 40 - 60 ° c . ): thf ( 4 : 1 by volume ) yielded the title compound . 1 h nmr ( 270 mhz ; cdcl 3 ): 8 . 85 - 9 . 0 ( m , 8h ), 8 . 1 ( d , j = 8 hz , 2h ), 7 . 43 ( s , 6h ), 7 . 28 ( d , j = 8 hz , 2h ), 4 . 2 - 4 . 35 ( m , 10h ), 4 . 09 ( t , 12h ), 2 . 97 ( s , 3h ), 1 . 1 - 2 . 0 ( m , 192h ), 0 . 91 ( t , 9h ), 0 . 84 ( t , 18h ), − 2 . 77 ( s , 2h ). the title compound was prepared according to the method described in example 41 above from 5 -[ 4 -( 12 - hydroxy - dodecyloxy )- phenyl ]- 10 , 15 , 20 - tris -( 3 , 4 , 5 - trihexyloxy - phenyl )- porphyrin ( see example 29 ). 1 h nmr ( 270 mhz ; cdcl 3 ): 8 . 87 - 9 . 0 ( m , 8h ), 8 . 11 ( d , j = 8 hz , 2h ), 7 . 44 ( s , 6h ), 7 . 3 ( d , j = 8 hz , 2h ), 4 . 2 - 4 . 35 ( m , 10h ), 4 . 1 ( t , 12h ), 2 . 98 ( s , 3h ), 1 . 3 - 2 . 1 ( m , 92h ), 1 . 0 ( t , 9h ), 0 . 87 ( t , 18h ), − 2 . 76 ( s , 2h ). the title compound was prepared according to the method described in example 41 above from 5 -[ 4 -( 6 - hydroxy - hexyloxy )- phenyl ]- 10 , 15 , 20 - tris -( 3 , 4 , 5 - trihexyloxy - phenyl )- porphyrin ( see example 30 ). 1 h nmr ( 270 mhz ; cdcl 3 ): 8 . 85 - 8 . 93 ( m , 8h ), 8 . 09 ( d , 2h , j = 8 . 25 hz ), 7 . 41 ( s , 6h ), 7 . 26 ( d , 2h , j = 8 . 25 hz ), 4 . 14 . 2 ( m , 10h ), 4 . 08 ( t , 12h ), 3 . 05 ( s , 3h ), 1 . 2 - 2 . 0 ( m , 78h ), 0 . 98 ( t , 9h ), 0 . 85 ( t , 18h ), − 2 . 79 ( s , 2h ). the title compound was prepared according to the method described in example 41 above from 5 -[ 4 -( 6 - hydroxy - hexyloxy )- phenyl ]- 10 , 15 , 20 - tris -( 3 , 4 , 5 - tridecyloxy - phenyl )- porphyrin ( see example 31 ). the title compound was prepared according to the method described in example 41 above from 5 -[ 4 -( 6 - hydroxy - hexyloxy )- phenyl ]- 10 , 15 , 20 - tris -( 3 , 4 , 5 - trihexadecyloxy - phenyl )- porphyrin ( see example 32 ). 1 h nmr ( 270 mhz ; cdcl 3 ): 8 . 8 - 8 . 93 ( m , 8h ), 8 . 1 ( d , 2h ), 7 . 42 ( m , 6h ), 7 . 25 ( d , 2h ), 4 . 3 ( m , 10h ), 4 . 08 ( t , 12h ), 3 . 05 ( s , 3h ), 1 : 0 - 2 . 0 ( m , 260h ), 0 . 8 - 0 . 9 ( m , 27h ), − 2 . 8 ( s , 2h ). the title compound was prepared according to the method described in example 41 above from 5 -[ 4 -( 12 - hydroxy - dodecyloxy )- phenyl ]- 10 , 15 , 20 - tris -( 3 , 4 , 5 - trihexyloxy - phenyl )- porphyrin ( see example 33 ). 1 h nmr ( 270 mhz ; cdcl 3 ): 8 . 87 - 8 . 96 ( m , 8h ), 8 . 11 ( d , 2h , j = 8 . 6 hz ), 7 . 44 ( s , 6h ), 7 . 28 ( d , 2h , j = 8 . 6 hz ), 4 . 31 ( t , 6h ), 4 . 18 - 4 . 28 ( m , 4h ), 4 . 1 ( t , 12h ), 2 . 96 ( s , 3h ), 1 . 2 - 2 . 05 ( m , 92h ), 0 . 99 ( t , 9h ), 0 . 87 ( t , 18h ), − 2 . 77 ( s , 2h ). the title compound was prepared according to the method described in example 41 above from 5 -[ 4 -( 12 - hydroxy - dodecyloxy )- phenyl ]- 10 , 15 , 20 - tris -( 3 , 4 , 5 - trihexadecyloxy - phenyl )- porphyrin ( see example 34 ). 1 h nmr ( 270 mhz ; cdcl 3 ): 8 . 85 - 8 . 93 ( m , 8h ), 8 . 09 ( d , 2h , j = 8 . 25 hz ), 7 . 42 ( s , 6h ), 7 . 27 ( d , 2h , j = 8 . 25 hz ), 4 . 2 - 4 . 3 ( m , 10h ), 4 . 08 ( t , 12h ), 2 . 99 ( s , 3h ), 1 . 2 - 2 . 0 ( m , 272h ), 0 . 83 - 0 . 9 ( m , 27h ), − 2 . 79 ( s , 2h ). the title compound was prepared according to the method described in example 41 above from 5 -[ 4 -( 16 - hydroxy - hexadecyloxy )- phenyl ]- 10 , 15 , 20 - tris -( 3 , 4 , 5 - tridecyloxy - phenyl )- porphyrin ( see example 35 ). 1 h nmr ( 270 mhz ; cdcl 3 ): 8 . 86 - 8 . 94 ( m , 8h ), 8 . 09 ( d , 2h ), 7 . 42 ( m , 6h ), 7 . 38 ( d , 2h ), 4 . 18 - 4 . 32 ( m , 10h ), 4 . 08 ( t , 12h ), 2 . 98 ( s , 3h ), 1 . 0 - 2 . 1 ( m , 172h ), 0 . 81 - 0 . 97 ( m , 27h ), − 2 . 8 ( s , 2h ). the title compound was prepared according to the method described in example 41 above from 5 -[ 4 -( 16 - hydroxy - hexadecyloxy )- phenyl ]- 10 , 15 , 20 - tris -( 3 , 4 , 5 - trihexadecyloxy - phenyl )- porphyrin ( see example 36 ). 1 h nmr ( 270 mhz ; cdcl 3 ): 8 . 85 - 8 . 95 ( m , 8h ), 8 . 1 ( d , 2h ), 7 . 4 ( s , 6h ), 7 . 3 ( d , 2h ), 4 . 18 - 4 . 32 ( m , 10h ), 4 . 08 ( t , 12h ), 3 . 0 ( s , 3h ), 1 . 0 - 2 . 1 ( m , 280h ), 0 . 8 - 0 . 9 ( m , 27h ), − 2 . 8 ( s , 2h ). the title compound was prepared according to the method described in example 41 above from 5 -[ 4 -( 12 - hydroxy - dodecyloxy )- phenyl ]- 10 , 15 , 20 - tris -( 3 , 5 - dihexyloxy - phenyl )- porphyrin ( see example 37 ). 1 h nmr ( 270 mhz ; cdcl 3 ): 8 . 87 - 8 . 98 ( m , 8h ), 8 . 11 ( d , 2h , j = 8 . 25 hz ), 7 . 39 ( m , 6h ), 7 . 27 ( d , 2h , j = 8 . 25 hz ), 6 . 9 ( m , 3h ), 4 . 23 ( t , 2h ), 4 . 19 ( t , 2h ), 4 . 13 ( t , 12h ), 2 . 94 ( s , 3h ), 1 . 2 - 2 . 0 ( m , 68h ), 0 . 89 ( t , 18h ), − 2 . 78 ( s , 2h ). the title compound was prepared according to the method described in example 41 above from 5 -[ 4 -( 6 - hydroxy - hexyloxy )- phenyl ]- 10 , 15 , 20 - tris -( 3 , 5 - didecyloxy - phenyl )- porphyrin ( see example 38 ). 1 h nmr ( 270 mhz ; cdcl 3 ): 8 . 93 - 9 . 05 ( m , 8h ), 8 . 19 ( d , 2h , j = 8 . 25 hz ), 7 . 46 ( m , 6h ), 7 . 32 ( d , 2h , j = 8 . 25 hz ), 6 . 96 ( m , 3h ), 4 . 32 ( m , 4h ), 4 . 19 ( m , 12h ), 3 . 06 ( s , 3h ), 1 . 2 - 2 . 1 ( m , 104h ), 0 . 91 ( m , 18h ), − 2 . 71 ( s , 2h ). the title compound was prepared according to the method described in example 41 above from 5 -[ 4 -( 12 - hydroxy - dodecyloxy )- phenyl ]- 10 , 15 , 20 - tris -( 3 , 5 - didecyloxy - phenyl )- porphyrin ( see example 39 ). 1 h nmr ( 270 mhz ; cdcl 3 ): 8 . 86 - 8 . 97 ( m , 8h ), 8 . 1 ( d , 2h , j = 8 . 6 hz ), 7 . 39 ( m , 6h ), 7 . 26 ( d , 2h , j = 8 . 6 hz ), 6 . 89 ( m , 3h ), 4 . 24 ( t , 2h ), 4 . 19 ( t , 2h ), 4 . 12 ( t , 12h ), 2 . 95 ( s , 3h ), 1 . 0 - 2 . 0 ( m , 116h ), 0 . 85 ( t , 18h ), − 2 . 79 ( s , 2h ). the title compound was prepared according to the method described in example 41 above from 5 -[ 4 -( 12 - hydroxy - dodecyloxy )- phenyl ]- 10 , 15 , 20 - tris -( 3 , 5 - dihexadecyloxy - phenyl )- porphyrin ( see example 40 ). 1 h nmr ( 270 mhz ; cdcl 3 ): 8 . 89 - 8 . 99 ( m , 8h ), 8 . 13 ( d , 2h , j = 8 . 25 hz ), 7 . 42 ( m , 6h ), 7 . 29 ( d , 2h , j = 8 . 25 hz ), 6 . 92 ( m , 3h ), 4 . 21 - 4 . 26 ( m , 4h ), 4 . 15 ( m , 12h ), 2 . 97 ( s , 3h ), 1 . 1 - 2 . 0 ( m , 188h ), 0 . 89 ( m , 18h ), − 2 . 75 ( s , 2h ). 5 -[ 4 -( 6 - methanesulfonyloxy - hexyloxy )- phenyl ]- 10 , 15 , 20 - tris3 , 4 , 5 - trihexyloxy - phenyl )- porphyrin ( 573mg , 0 . 33mmol , see example 43 ) was heated to reflux in dry thf ( 20 ml ). a solution of sodium butenoate ( nah ( excess ) in 3 - buten - 1 - ol ( 1 equiv .)) was added causing the reaction mixture to turn deep green . the reaction was heated at reflux until the reaction was complete ( ca . 3 - 5 hours ). the mixture was cooled , water was added and the solution was extracted with diethyl ether . the organic phase was washed with brine , dried over mgso 4 , filtered and the filtrate evaporated under reduced pressure . column chromatography on silica gel with petroleum ether ( b . p . 40 - 60 ° c . ): thf ( 10 : 1 by volume ) yielded the title compound . the title compound was prepared according to the method described in example 54 above from 5 -[ 4 -( 6 - methanesulfonyloxy - hexyloxy )- phenyl ]- 10 , 15 , 20 - tris -( 3 , 4 , 5 - tridecyloxy - phenyl )- porphyrin ( see example 44 ). 1 h nmr ( 270 mhz ; cdcl 3 ): 8 . 85 - 8 . 94 ( m , 8h ), 8 . 09 ( d , 2h , j = 8 . 6 hz ), 7 . 49 ( m , 6h ), 7 . 27 ( d , 2h , j = 8 . 6 hz ), 5 . 9 ( m , 1h ), 5 . 04 - 5 . 16 ( m , 2h ), 4 . 29 ( m , 8h ), 4 . 08 ( t , 12h ), 3 . 53 ( t , 4h ), 2 . 38 ( m , 2h ), 1 . 2 - 2 . 1 ( m , 152h ), 0 . 91 ( t , 9h ), 0 . 83 ( t , 18h ), − 2 . 79 ( s , 2h ). the title compound was prepared according to the method described in example 54 above from 5 -[ 4 -( 6 - methanesulfonyloxy - hexyloxy )- phenyl ]- 10 , 15 , 20 - tris -( 3 , 4 , 5 - trihexadecyloxy - phenyl )- porphyrin ( see example 45 ). 1 h nmr ( 270 mhz ; cdcl 3 ): 8 . 87 - 8 . 95 ( m , 8h ), 8 . 1 ( d , 2h , j = 7 . 92 hz ), 7 . 43 ( s , 6h ), 7 . 24 ( d , 2h , j = 7 . 92 hz ), 5 . 9 ( m , 1h ), 5 . 09 - 5 . 12 ( m , 2h ), 4 . 3 ( m , 8h ), 4 . 09 ( t , 12h ), 3 . 53 ( t , 4h ), 2 . 4 ( m , 2h ), 1 . 0 - 2 . 1 ( m , 260h ), 0 . 84 - 0 . 88 ( m , 27h ), − 2 . 77 ( s , 2h ). the title compound was prepared according to the method described in example 54 above from 5 -[ 4 -( 12 - methanesulfonyloxy - dodecyloxy )- phenyl ]- 10 , 15 , 20 - tris -( 3 , 4 , 5 - trihexyloxy - phenyl )- porphyrin ( see example 46 ). 1 h nmr ( 270 mhz ; cdcl 3 ): 8 . 86 - 8 . 94 ( m , 8h ), 8 . 1 ( d , 2h , j = 7 . 92 hz ), 7 . 42 ( s , 6h ), 7 . 3 ( d , 2h , j = 7 . 92 hz ), 5 . 83 ( m , 1h ), 5 . 01 - 5 . 12 ( m , 2h ), 4 . 3 ( t , 6h ), 4 . 28 ( t , 2h ), 4 . 09 ( t , 12h ), 3 . 46 ( t , 2h ), 3 . 43 ( t , 2h ), 2 . 33 ( m , 2h ), 1 . 1 - 2 . 0 ( m , 92h ), 0 . 99 ( t , 9h ), 0 . 86 ( t , 18h ), − 2 . 78 ( s , 2h ). the title compound was prepared according to the method described in example 54 above from 5 -[ 4 -( 12 - methanesulfonyloxy - dodecyloxy )- phenyl ]- 10 , 15 , 20 - tris -( 3 , 4 , 5 - tridecyloxy - phenyl )- porphyrin ( see example 41 ). 1 h nmr ( 270 mhz ; cdcl 3 ): 8 . 87 - 8 . 95 ( m , 8h ), 8 . 11 ( d , 2h , j = 7 . 92 hz ), 7 . 43 ( s , 6h ), 7 . 27 ( d , 2h , j = 7 . 92 hz ), 5 . 8 ( m , 1h ), 5 . 01 - 5 . 11 ( m , 2h ), 4 . 31 ( t , 6h ), 4 . 25 ( t , 2h ), 4 . 09 ( t , 12h ), 3 . 45 ( t , 2h ), 3 . 42 ( t , 2h ), 2 . 33 ( m , 2h ), 1 . 0 - 2 . 0 ( m , 164h ), 0 . 91 ( t , 9h ), 0 . 84 ( t , 18h ), − 2 . 77 ( s , 2h ). the title compound was prepared according to the method described in example 54 above from 5 -[ 4 -( 12 - methanesulfonyloxy - dodecyloxy )- phenyl ]- 10 , 15 , 20 - tris -( 3 , 4 , 5 - trihexadecyloxy - phenyl )- porphyrin ( see example 47 ). 1 h nmr ( 270 mhz ; cdcl 3 ): 8 . 87 - 8 . 93 ( m , 8h ), 8 . 09 ( d , 2h , j = 7 . 92 hz ), 7 . 42 ( s , 6h ), 7 . 27 ( d , 2h , j = 7 . 92 hz ), 5 . 9 ( m , 1h ), 5 . 01 - 5 . 12 ( m , 2h ), 4 . 29 ( m , 8h ), 4 . 08 ( t , 12h ), 3 . 47 ( t , 2h ), 3 . 43 ( t , 2h ), 2 . 37 ( m , 2h ), 1 . 0 - 2 . 0 ( m , 272h ), 0 . 83 - 0 . 87 ( m , 27h ), − 2 . 79 ( s , 2h ). the title compound was prepared according to the method described in example 54 above from 5 -[ 4 -( 16 - methanesulfonyloxy - hexadecyloxy )- phenyl ]- 10 , 15 , 20 - tris -( 3 , 4 , 5 - tridecyloxy - phenyl )- porphyrin ( see example 48 ). the title compound was prepared according to the method described in example 54 above from 5 -[ 4 -( 16 - methanesulfonyloxy - hexadecyloxy )- phenyl ]- 10 , 15 , 20 - tris -( 3 , 4 , 5 - trihexadecyloxy - phenyl )- porphyrin ( see example 49 ). the title compound was prepared according to the method described in example 54 above from 5 -[ 4 -( 12 - methanesulfonyloxy - dodecyloxy )- phenyl ]- 10 , 15 , 20 - tris -( 3 , 5 - dihexyloxy - phenyl )- porphyrin ( see example 50 ). 1 h nmr ( 270 mhz ; cdcl 3 ): 8 . 85 - 8 . 96 ( m , 8h ), 8 . 09 ( d , 2h , j8 . 25 hz ), 7 . 38 ( m , 6h ), 7 . 25 ( d , 2h , j = 8 . 25 hz ), 6 . 88 ( m , 3h ), 5 . 81 ( m , 1h ), 5 . 0 - 5 . 11 ( m , 2h ), 4 . 22 ( t , 2h ), 4 . 11 ( t , 12h ), 3 . 44 ( t , 2h ), 3 . 40 ( t , 2h ), 2 . 32 ( m , 2h ), 1 . 1 - 2 . 0 ( m , 68h ), 0 . 87 ( m , 18h ), − 2 . 8 ( s , 2h ). the title compound was prepared according to the method described in example 54 above from 5 -[ 4 -( 6 - methanesulfonyloxy - hexyloxy )- phenyl ]- 10 , 15 , 20 - tris -( 3 , 5 - didecyloxy - phenyl )- porphyrin ( see example 51 ). 1 h nmr ( 270 mhz ; cdcl 3 ): 8 . 86 - 8 . 95 ( m , 8h ), 8 . 1 ( m , 2h ), 7 . 37 ( m , 6h ), 7 . 25 ( m , 2h ), 6 . 88 ( m , 3h ), 5 . 85 ( m , 1h ), 5 . 0 - 5 . 2 ( m , 2h ), 4 . 23 ( m , 2h ), 4 . 11 ( m , 12h ), 3 . 5 ( m , 4h ), 2 . 4 ( m , 2h ), 1 . 0 - 2 . 0 ( m , 104h ), 0 . 84 ( m , 18h ), − 2 . 8 ( s , 2h ). the title compound was prepared according to the method described in example 54 above from 5 -[ 4 -( 12 - methanesulfonyloxy - dodecyloxy )- phenyl ]- 10 , 15 , 20 - tris -( 3 , 5 - didecyloxy - phenyl )- porphyrin ( see example 52 ). 1 h nmr ( 270 mhz ; cdcl 3 ): 8 . 86 - 8 . 97 ( m , 8h ), 8 . 1 ( d , 2h , j = 8 . 6 hz ), 7 . 38 ( m , 6h ), 7 . 26 ( d , 2h , j = 8 . 6 hz ), 6 . 89 ( m , 3h ), 5 . 8 ( m , 1h ), 4 . 98 - 5 . 12 ( m , 2h ), 4 . 23 ( t , 2h ), 4 . 11 ( t , 12h ), 3 . 45 ( t , 2h ), 3 . 41 ( t , 2h ), 2 . 3 ( m , 2h ), 1 . 0 - 2 . 0 ( m , 116h ), 0 . 84 ( m , 18h ), − 2 . 79 ( s , 2h ). the title compound was prepared according to the method described in example 54 above from 5 -[ 4 -( 12 - methanesulfonyloxy - dodecyloxy )- phenyl ]- 10 , 15 , 20 - tris -( 3 , 5 - dihexadecyloxy - phenyl )- porphyrin ( see example 53 ). 1 h nmr ( 270 mhz ; cdcl 3 ): 8 . 86 - 8 . 95 ( m , 8h ), 8 . 1 ( d , 2h , j = 7 . 92 hz ), 7 . 38 ( m , 6h ), 7 . 26 ( d , 2h , j = 7 . 92 hz ), 6 . 88 ( m , 3h ), 5 . 8 ( m , 1h ), 4 . 98 - 5 . 12 ( m , 2h ), 4 . 23 ( t , 2h ), 4 . 11 ( t , 12h ), 3 . 45 ( t , 2h ), 3 . 41 ( t , 2h ), 2 . 33 ( m , 2h ), 1 . 0 - 2 . 0 ( m , 188h ), 0 . 85 ( m , 18h ), − 2 . 79 ( s , 2h ). 5 -[ 4 -( 12 - methanesulfonyloxy - dodecyloxy )- phenyl ]- 10 , 15 , 20 - tris -( 3 , 4 , 5 - tridecyloxy - phenyl )- porphyrin ( 159 mg , 0 . 07 mmol , see example 41 ) and an excess of thiourea were heated at reflux in 1 - pentanol ( 5 ml ) until no starting material remained ( approx . 1 hour ). ethanol ( 2 ml ) was added followed by aqueous naoh ( 10 % w / v , 2 ml ) and heating at reflux was continued for a further 5 minutes . the solution was allowed to cool and then added to dilute aqueous hcl ( 10 % v / v ). the reaction mixture was extracted with dichloromethane , the organic extracts washed with brine , dried over mgso 4 , filtered and evaporated under reduced pressure . column chromatography on silica gel with petroleum ether ( b . p . 40 - 60 ° c . ): thf ( 4 : 1 by volume ) yielded the title compound . 1 h nmr ( 270 mhz ; cdcl 3 ): 8 . 87 - 9 . 0 ( m , 8h ), 8 . 11 ( d , j = 8 hz , 2h ), 7 . 44 ( s , 6h ), 7 . 3 ( d , j = 8 hz , 2h ), 4 . 31 ( t , 8h ), 4 . 27 ( t , 2h ), 4 . 1 ( t , 12h ), 2 . 71 ( t , 2h ), 1 . 2 - 2 . 05 ( m , 164h ), 0 . 92 ( t , 9h ), 0 . 85 ( t , 18h ), − 2 . 76 ( s , 2h ). λ max ( nm , thf ). 650 . 5 , 592 . 5 , 552 . 5 , 516 . 0 , 423 . 0 . 5 , 5 ′-{ 4 , 4 ′-[ 12 , 12 ′- dithiobis -( dodecyloxy )- phenyl ]}- 10 , 10 ′, 15 , 15 ′, 20 , 20 ′- hexakis -( 3 , 4 , 5 - tridecyloxy - phenyl )- diporphyrin ( 114 mg , 25 μmol , see example 66 ) was heated to reflux in thf ( 5 ml ). an excess of zinc acetate dihydrate was added and heating at reflux was continued for 30 mins . the solvent was evaporated under reduced pressure and the residue obtained was purified by chromatography using a short column of silica gel which was eluted with petroleum ether ( b . p . 40 - 60 ° c . ): thf ( 4 : 1 by volume ) to yield the title compound . 1 h nmr ( 270 mhz ; cdcl 3 ): 8 . 9 - 9 . 1 ( m , 8h ), 8 . 1 ( d , j = 8 hz , 2h ), 7 . 42 ( s , 6h ), 7 . 27 ( d , j = 8 hz , 2h ), 4 . 29 ( t , 8h ), 4 . 24 ( t , 2h ), 4 . 09 ( t , 12h ), 2 . 67 ( t , 2h ), 1 . 2 - 2 . 05 ( m , 164h ), 0 . 91 ( t , 9h ), 0 . 83 ( t , 18h ). λ max ( ε × 10 5 ): 598 . 0 ( 0 . 12 ), 557 . 0 ( 0 . 38 ), 427 . 5 ( 12 . 6 ), 406 . 5 ( 0 . 86 ) ( nm , thf ). maldi - ms : 4601 [ m + ], 2300 [ m 2 + , 100 %]. found : c , 76 . 39 %; h , 10 . 39 %; n , 2 . 12 %; c 292 h 462 n 8 o 20 s 2 zn 2 requires : c , 76 . 25 %; h , 10 . 12 %; n , 2 . 44 %. 5 , 5 ′-{ 4 , 4 ′-[ 12 , 12 ′- dithiobis -( dodecyloxy )- phenyl ]}- 10 , 10 ′, 15 , 15 ′, 20 , 20 ′- hexakis -( 3 , 4 , 5 - tridecyloxy - phenyl ) diporphyrin ( 100 mg , 22 μmol , see example 66 ) was heated for 4 hours at reflux in dry pyridine ( 10 ml ) under an atmosphere of dry nitrogen in the presence of an excess of magnesium perchlorate . the mixture was cooled and fractionated between water and diethyl ether . the organic phase was washed with dilute aqueous hcl and brine , dried over mgso 4 , and evaporated under reduced pressure . column chromatography using a short column of silica gel which was eluted with petroleum ether ( b . p . 40 - 60 ° c . ): thf ( 10 : 1 by volume ) yielded the title compound . 1 h nmr ( 270 mhz ; cdcl 3 ): 8 . 8 - 9 . 1 ( m , 8m ), 7 . 25 - 7 . 5 ( m , 8h ),. 3 . 9 - 4 . 4 ( m , 22h ), 2 . 7 ( t , 2h ), 1 . 1 - 2 . 1 ( m , 164h ), 0 . 8 - 1 . 0 ( m , 27h ). λ max ( ε × 10 5 ) 615 . 0 ( 0 . 23 ), 569 . 0 ( 0 . 26 ), 432 . 0 ( 10 . 77 ) ( nm , thf ). maldi - ms : 4518 [ m + , 100 %], 2260 [ m 2 + ]. found : c , 77 . 39 %; h , 10 . 28 %; n , 2 . 42 %; c 292 h 462 n 8 o 20 s 2 mg 2 requires : c , 77 . 63 %; h , 10 . 31 %; n , 2 . 48 %. the title compound was prepared according to the method described in example 67 above from 5 -[ 4 -( 6 - but - 3 - enyloxy - hexyloxy )- phenyl ]- 10 , 15 , 20 - tris -( 3 , 4 , 5 - trihexyloxy - phenyl )- porphyrin ( see example 54 ). 1 h nmr ( 270 mhz ; cdcl 3 ): 8 . 97 - 9 . 05 ( m , 8h ), 8 . 1 ( d , 2h , j = 8 . 25 hz ), 7 . 43 ( s , 6h ), 7 . 27 ( d , 2h , j = 8 . 25 hz ), 5 . 85 ( m , 1h ), 5 . 05 - 5 . 17 ( m , 2h ), 4 . 3 ( t , 6h ), 4 . 27 ( t , 2h ), 4 . 08 ( t , 12h ), 3 . 53 ( m , 4h ), 2 . 39 ( m , 2h ), 1 . 2 - 2 . 0 ( m , 78h ), 0 . 99 ( t , 9h ), 0 . 86 ( t , 18h ). λ max ( ε × 10 5 ): 406 . 0 ( 0 . 51 ), 427 . 0 ( 6 . 6 ), 557 . 0 ( 0 . 26 ), 597 . 0 ( 0 . 12 ) ( nm , thf ). fab - ms : 1749 [ m + ]. found : c , 74 . 22 %; h , 8 . 83 %; n , 3 . 07 %; c 108 h 154 n 4 o 11 zn requires : c , 74 . 13 %; h , 8 . 87 %; n , 3 . 2 %. the title compound was prepared according to the method described in example 67 above from 5 -[ 4 -( 6 - but - 3 - enyloxy - hexyloxy )- phenyl ]- 10 , 15 , 20 - tris -( 3 , 4 , 5 - tridecyloxy - phenyl )- porphyrin ( see example 55 ). 1 h nmr ( 270 mhz ; cdcl 3 ): 8 . 94 - 9 . 02 ( m , 8h ), 8 . 07 ( d , 21h , j = 8 . 6 hz ), 7 . 4 ( s , 6h ), 7 . 25 ( d , 2h , j = 8 . 6 hz ), 5 . 86 ( m , 1h ), 5 . 07 - 5 . 14 ( m , 2h ), 4 . 27 ( m , 8h ), 4 . 05 ( t , 12h ), 3 . 5 ( m , 4h ), 2 . 37 ( m , 2h ), 1 . 2 - 2 . 1 ( m , 152h ), 0 . 89 ( t , 9h ), 0 . 81 ( t , 18h ). λ max ( ε × 10 5 ): 406 . 0 ( 0 . 59 ), 427 . 0 ( 6 . 8 ), 557 . 0 , ( 0 . 31 ), 597 . 0 ( 0 . 17 ) ( nm , thf ). fab - ms : 2253 . 5 [ m + ]. found : c , 76 . 86 %; h , 10 . 24 %; n , 2 . 31 %; c 144 h 226 n 4 o 11 , zn requires : c , 76 . 71 %; h , 10 . 10 %; n , 2 . 48 %. the title compound was prepared according to the method described in example 67 above from 5 -[ 4 -( 6 - but - 3 - enyloxy - hexyloxy )- phenyl ]- 10 , 15 , 20 - tris -( 3 , 4 , 5 - trihexadecyloxy - phenyl )- porphyrin ( see example 56 ). 1 h nmr ( 270 mhz ; cdcl 3 ): 8 . 91 - 9 . 0 ( m , 8h ), 8 . 09 ( d , 2h , j = 7 . 92 hz ), 7 . 42 ( s , 6h ), 7 . 25 ( d , 2h , j = 7 . 92 hz ), 5 . 88 ( m , 1h ), 5 . 02 - 5 . 18 ( m , 2h ), 4 . 3 ( m , 8h ), 4 . 09 ( t , 12h ), 3 . 5 ( m , 4h ), 2 . 38 ( m , 2h ), 1 . 0 - 2 . 0 ( m , 260h ), 0 . 82 - 0 . 89 ( m , 27h ). λ max ( ε × 10 5 ): 406 . 0 ( 0 . 5 ), 428 . 0 ( 6 . 86 ), 557 . 0 ( 0 . 23 ), 597 . 0 ( 0 . 09 ) ( nm , thf ). maldi - ms : 3011 [ m + ]. mpt : 48 ° c . found : c , 78 . 59 %; h , 11 . 08 %; n , 1 . 82 %; c 198 h 334 n 4 o 11 zn requires : c , 78 . 95 %; h , 11 . 18 %; n , 1 . 86 %. the title compound was prepared according to the method described in example 67 above from 5 -[ 4 -( 12 - but - 3 - enyloxy - dodecyloxy )- phenyl ]- 10 , 15 , 20 - tris -( 3 , 4 , 5 - trihexyloxy - phenyl )- porphyrin ( see example 57 ). 1 h nmr ( 270 mhz ; cdcl 3 ): 9 . 01 - 9 . 09 ( m , 8h ), 8 . 13 ( d , 2h , j = 8 . 6 hz ), 7 . 47 ( s , 6h ), 7 . 3 ( d , 2h , j = 8 . 6 hz ), 5 . 81 ( m , 1h ), 5 . 03 - 5 . 12 ( m , 2h ), 4 . 33 ( t , 6h ), 4 . 28 ( t , 2h ), 4 . 11 ( t , 12h ), 3 . 37 ( t , 2h ), 3 . 33 ( t , 2h ), ( m , 2h ), 1 . 2 - 2 . 1 ( m , 92h ), 1 . 03 ( t , 9h ), 0 . 9 ( t , 18h ). λ max ( ε × 10 5 ): 406 . 0 ( 0 . 48 ), 428 . 0 ( 6 . 52 ), 557 . 0 ( 0 . 23 ), 597 . 0 ( 0 . 09 ) ( nm , thf ). fab - ms : 1835 . 5 [ m + ]. found : c , 74 . 99 %; h , 8 . 85 %; n , 2 . 97 %; c 114 h 166 n 4 o 11 zn requires : c , 74 . 66 %; h , 9 . 12 %; n , 3 . 05 %. the title compound was prepared according to the method described in example 67 above from 5 -[ 4 -( 12 - but - 3 - enyloxy - dodecyloxy )- phenyl ]- 10 , 15 , 20 - tris -( 3 , 4 , 5 - tridecyloxy - phenyl )- porphyrin ( see example 58 ). 1 h nmr ( 270 mhz ; cdcl 3 ): 8 . 96 - 9 . 04 ( m , 8h ), 8 . 09 ( d , 2h , j = 8 . 6 hz ), 7 . 43 ( s , 6h ), 7 . 26 ( d , 2h , j = 8 . 6 hz ), 5 . 79 ( m , 1h ), 5 . 63 - 5 . 1 ( m , 2h ), 4 . 3 ( t , 6h ), 4 . 27 ( t , 2h ), 4 . 08 ( t , 12h ), 3 . 39 ( t , 2h ), 3 . 35 ( t , 2h ), 2 . 27 ( m , 2h ), 1 . 2 - 2 . 0 ( m , 164h ), 0 . 91 ( t , 9h ), 0 . 83 ( t , 18h ). λ max ( ε × 10 5 ): 406 . 0 ( 0 . 51 ), 428 . 0 ( 7 . 14 ), 557 . 0 ( 0 . 24 ), 597 . 0 ( 0 . 10 ) ( nm , thf ). fab - ms : 2338 . 5 [ m + ]. found : c , 77 . 47 %; h , 10 . 35 %; n , 2 . 20 %; c150h 238 n 4 o 11 zn requires : c , 77 . 03 %; h , 10 . 26 %; n , 2 . 39 %. the title compound was prepared according to the method described in example 67 above from 5 -[ 4 -( 12 - but - 3 - enyloxy - dodecyloxy )- phenyl ]- 10 , 15 , 20 - tris -( 3 , 4 , 5 - trihexadecyloxy - phenyl )- porphyrin ( see example 59 ). 1 h nmr ( 270 mhz ; cdcl 3 ): 8 . 96 - 9 . 04 ( m , 8h ), 8 . 09 ( d , 2h , j = 8 . 25 hz ), 7 . 42 ( s , 6h ), 7 . 27 ( d , 2h , j = 8 . 25 hz ), 5 . 8 ( m , 1h ), 5 . 0 - 5 . 1 ( m , 2h ), 4 . 29 ( m , 8h ), 4 . 07 ( t , 12h ), 3 . 43 ( t , 2h ), 3 . 39 ( t , 2h ), 2 . 3 ( m , 2h ), 1 . 0 - 2 . 05 ( m , 272h ), 0 . 85 - 0 . 87 ( m , 27h ). λ max ( ε × 10 5 ): 406 . 0 ( 0 . 54 ), 427 . 0 ( 6 . 6 ), 557 . 0 ( 0 . 28 ), 597 . 0 ( 0 . 14 ) ( nm , thf ). maldi - ms : 3096 [ m + ]. found : c , 78 . 96 %; h , 11 . 25 %; n , 1 . 75 %; c 204 h 346 n 4 o 11 zn requires : c , 79 . 13 %; h , 11 . 26 %; n , 1 . 81 %. the title compound was prepared according to the method described in example 67 above from 5 -[ 4 -( 16 - but - 3 - enyloxy - hexadecyloxy )- phenyl ]- 10 , 15 , 20 - tris -( 3 , 4 , 5 - tridecyloxy - phenyl )- porphyrin ( see example 60 ). 1 h nmr ( 270 mhz ; cdcl 3 ): 9 . 0 - 9 . 09 ( m , 8h ), 8 . 12 ( d , 2h , j = 8 . 25 hz ), 7 . 46 ( s , 6h ), 7 . 29 ( d , 2h , j = 8 . 25 hz ), 5 . 9 ( m , 1h ), 5 . 0 - 5 . 2 ( m , 2h ), 4 . 33 ( m , 8h ), 4 . 1 ( t , 12h ), 3 . 29 ( t , 2h ), 3 . 25 ( t , 2h ), 2 . 1 ( m , 2h ), 1 . 0 - 2 . 0 ( m , 172h ), 0 . 87 - 0 . 95 ( m , 27h ). λ max ( ε × 10 5 ): 406 . 0 ( 0 . 47 ), 427 . 0 ( 6 . 71 ), 557 . 0 ( 0 . 25 ), 598 . 0 ( 0 . 12 ) ( nm , thf ). fab - ms : 2393 [ m + , weak ]. found : c , 77 . 27 %; h , 10 . 29 %; n , 2 . 04 %; c 154 h 246 n 4 o 11 zn requires : c , 77 . 23 %; h , 10 . 35 %; n , 2 . 34 %. the title compound was prepared according to the method described in example 67 above from 5 -[ 4 -( 16 - but - 3 - enyloxy - hexadecyloxy )- phenyl ]- 10 , 15 , 20 - tris -( 3 , 4 , 5 - trihexadecyloxy - phenyl )- porphyrin ( see example 61 ). 1 h nmr ( 270 mhz ; cdcl 3 ): 8 . 89 - 8 . 97 ( m , 8h ), 8 . 02 ( d , 2h ), 7 . 35 ( s , 6h ), 7 . 3 ( d , 2h ), 5 . 8 ( m , 1h ), 4 . 8 - 5 . 0 ( m , 2h ), 4 . 22 ( m , 8h ), 3 . 99 ( t , 12h ), 3 . 28 ( t , 2h ), 3 . 23 ( t , 2h ), 1 . 0 - 2 . 2 ( m , 282h ), 0 . 78 ( m , 27h ). λ max ( ε × 10 5 ): 406 . 0 ( 0 . 56 ), 427 . 0 ( 7 . 28 ), 557 . 0 ( 0 . 26 ), 598 . 0 ( 0 . 11 ) ( nm , thf ). maldi - ms : 3152 [ m + ]. the title compound was prepared according to the method described in example 68 above from 5 -[ 4 -( 6 - but - 3 - enyloxy - hexyloxy )- phenyl ]- 10 , 15 , 20 - tris -( 3 , 4 , 5 - tridecyloxy - phenyl )- porphyrin ( see example 55 ). 1 h nmr ( 270 mhz ; cdcl 3 ): 8 . 87 - 8 . 96 ( m , 8h ), 8 . 09 ( d , 2h , j = 8 . 6 hz ), 7 . 41 ( s , 6h ), 7 . 1 ( d , 2h , j = 8 . 6 hz ), 5 . 71 ( m , 1h ), 4 . 97 - 5 . 05 ( m , 2h ), 4 . 26 ( t , 6h ), 4 . 22 ( t , 2h ), 4 . 04 ( t , 12h ), 3 . 25 ( t , 4h ), 2 . 14 ( m , 2h ), 1 . 2 - 2 . 0 ( m , 152h ), 0 . 88 ( t , 4h ), 0 . 81 ( t , 18h ). λ max ( ε × 10 5 ): 432 . 0 ( 6 . 1 ), 571 . 0 ( 0 . 22 ), 614 . 0 ( 0 . 18 ) ( nm , thf ). fab - ms : 2213 . 5 [ m + ]. found : c , 77 . 77 %; h , 10 . 25 %; n , 2 . 34 %; c 144 h 226 n 4 o 11 mg requires : c , 78 . 13 %; h , 10 . 29 %; n , 2 . 53 %. the title compound was prepared according to the method described in example 67 above from 5 -[ 4 -( 12 - but - 3 - enyloxy - dodecyloxy )- phenyl ]- 10 , 15 , 20 - tris -( 3 , 5 - dihexyloxy - phenyl )- porphyrin ( see example 62 ). 1 h nmr ( 270 mhz ; cdcl 3 ): 8 . 97 - 9 . 07 ( m , 8h ), 8 . 1 ( d , 2h , j = 8 . 25 hz ), 7 . 37 ( m , 6h ), 7 . 24 ( d , 2h , j = 8 . 25 hz ), 6 . 83 ( m , 3h ), 5 . 74 ( m , 1h ), 4 . 98 - 5 . 07 ( m , 2h ), 4 . 21 ( t , 2h ), 4 . 07 ( t , 12h ), 3 . 26 ( t , 2h ), 3 . 22 ( t , 2h ), 2 . 19 ( m , 2h ), 1 . 1 - 2 . 0 ( m , 68h ), 0 . 89 ( t , 18h ). λ max ( ε × 10 5 ): 405 . 0 ( 0 . 63 ), 425 . 0 ( 9 . 45 ), 556 . 0 ( 0 . 29 ), 595 . 0 ( 0 . 08 ) ( nm , thf ). fab - ms : 1533 [ m + ]. found : c , 75 . 47 %; h , 8 . 61 %; n , 3 . 38 %; c 96 h 130 n 4 o 8 zn requires : c , 75 . 19 %; h , 8 . 54 %; n , 3 . 65 %. the title compound was prepared according to the method described in example 67 above from 5 -[ 4 -( 6 - but - 3 - enyloxy - hexyloxy )- phenyl ]- 10 , 15 , 20 - tris -( 3 , 5 - didecyloxy - phenyl )- porphyrin ( see example 63 ). 1 h nmr ( 270 mhz ; cdcl 3 ): 8 . 96 - 9 . 06 ( m , 8h ), 8 . 09 ( d , 2h , j = 8 . 25 hz ), 7 . 35 ( m , 6h ), 7 . 21 ( d , 2h , j = 8 . 25 hz ), 6 . 81 ( m , 3h ), 5 . 76 ( m , 1h ), 5 . 0 - 5 . 09 ( m , 2h ), 4 . 18 ( t , 2h ), 4 . 06 ( t , 12h ), 3 . 29 ( m , 4h ), 2 . 2 ( m , 2h ), 1 . 1 - 2 . 0 ( m , 104h ), 0 . 84 ( t , 18h ). λ max ( ε × 10 5 ): 404 . 0 ( 0 . 57 ), 425 . 0 ( 8 . 86 ), 556 . 0 ( 0 . 28 ), 595 . 0 ( 0 . 08 ) ( nm , thf ). fab - ms : 1786 . 3 [ m + ]. found : c , 76 . 54 %; h , 9 . 37 %; n , 2 . 98 %; c 114 h 166 n 4 o 8 zn requires : c , 76 . 67 %; h , 9 . 37 %; n , 3 . 14 %. the title compound was prepared according to the method described in example 67 above from 5 -[ 4 -( 12 - but - 3 - enyloxy - dodecyloxy )- phenyl ]- 10 , 15 , 20 - tris -( 3 , 5 - didecyloxy - phenyl )- porphyrin ( see example 64 ). 1 h nmr ( 270 mhz ; cdcl 3 ): 8 . 95 - 9 . 05 ( m , 8h ), 8 . 09 ( d , 2h , j = 8 . 6 hz ), 7 . 36 ( m , 6h ), 7 . 24 ( d , 2h , j = 8 . 6 hz ), 6 . 84 ( m , 3h ), 5 . 8 ( m , 1h ), 5 . 02 - 5 . 12 ( m , 2h ), 4 . 22 ( t , 2h ), 4 . 08 ( t , 12h ), 3 . 26 - 3 . 35 ( m , 4h ), 2 . 26 ( m , 2h ), 1 . 1 - 2 . 1 ( m , 116h ), 0 . 84 ( t , 18h ). λ max ( ε × 10 5 ): 404 . 0 ( 0 . 54 ), 425 . 0 ( 7 . 59 ), 556 . 0 ( 0 . 25 ), 595 . 0 ( 0 . 07 ) ( nm , thf ). fab - ms : 1871 . 5 [ m + ]. found : c , 77 . 18 %; h , 9 . 71 %; n , 2 . 85 %; c 120 h 178 n 4 o 8 zn requires : c , 77 . 07 %; h , 9 . 59 %; n , 2 . 99 %. the title compound was prepared according to the method described in example 67 above from 5 -[ 4 -( 12 - but - 3 - enyloxy - dodecyloxy )- phenyl ]- 10 , 15 , 20 - tris -( 3 , 5 - dihexadecyloxy - phenyl )- porphyrin ( see example 65 ). 1 h nmr ( 270 mhz ; cdcl 3 ): 8 . 92 - 9 . 02 ( m , 8h ), 8 . 07 ( d , 2h , j = 8 . 25 hz ), 7 . 35 ( m , 6h ), 7 . 21 ( d , 2h , j = 8 . 25 hz ), 6 . 83 ( m , 3h ), 5 . 74 ( m , 1h ), 4 . 96 - 5 . 06 ( m , 2h ), 4 . 2 ( t , 2h ), 4 . 07 ( t , 12h ), 3 . 3 ( t , 2h ), 3 . 26 ( t , 2h ), 2 . 21 ( m , 2h ), 1 . 1 - 2 . 1 ( m , 188h ), 0 . 83 ( t , 18h ). λ max ( ε × 10 5 ): 404 . 0 ( 0 . 53 ), 425 . 0 ( 7 . 07 ), 556 . 0 ( 0 . 24 ), 595 . 0 ( 0 . 08 ) ( nm , thf ). fab - ms : 2374 . 5 [ m + ]. found : c , 78 . 62 %; h , 10 . 51 %; n , 2 . 12 %; c 156 h 250 n 4 o 8 zn requires : c , 78 . 89 %; h , 10 . 61 %; n , 2 . 36 %. analytical grade potassium hydroxide ( 100 g ) was dissolved in millipore ® water ( 100 ml ) and the solution was made up to 250 ml with distol grade methanol . 1 . the slides were wiped with a kimwipe ® tissue paper and rinsed with distol grade methanol . 2 . the slides were immersed in the base solution prepared as described above for a minimum of 12 hours . 3 . the slides were washed with millipore ® water and dried in a stream of propan - 2 - ol at reflux . a layer of gold ( ca . 45 nm ) was deposited on the slides using an edwards 306 vacuum evaporator . a thin layer of chromium ( ca . 1 nm ) was initially deposited on the slides prior to the deposition of the gold to improve the adhesion of the gold to the slide . a solution of 5 , 5 ′-{ 4 , 4 ′-[ 12 , 12 ′- dithiobis -( dodecyloxy )- phenyl ]}- 10 , 10 ′, 15 , 15 ′, 20 , 20 ′- hexakis -( 3 , 4 , 5 - tridecyloxy - phenyl )- diporphyrinato zinc ( 24 . 99 mg , see example 67 ) in spectroscopic grade cyclohexane ( 100 ml ) was prepared . a gold coated slide prepared according to the method of example 82 ( c ) above and it was immersed in the diporphyrinato zinc cyclohexane solution for 24 hours . the slide was then rinsed with cyclohexane until the washings were colourless . rair spectra of the slides were obtained using a blank gold coated slide to record the background . a solution of 1 . 0 - 3 . 0 mg of each of the title compounds of examples 69 to 81 above in 1 ml xylene was prepared . procedure 1 : components for med - 6640 film preparation were obtained from nusil technology — europe . solution a ( 1 . 05 ml ) and solution b ( 1 ml ) were mixed with stirring . the solution of the respective porphyrin of examples 69 to 81 ( see above ) in xylene ( 50 μl ) was added . portions of the mixture were deposited onto microscope cover slips ( 13 mm diameter ) which were placed in an oven and heated to 40 ° c . for 2 hrs . the temperature was gradually raised to 150 ° c . and the slides were kept at this temperature for 15 mins and then allowed to cool . procedure 2 : the procedure 1 was repeated using solution a ( 1 . 025 ml ), solution b ( 1ml ) and the solution of the respective porphyrin in xylene ( 25 μl ). the emission spectra were recorded using a spex fluorolog 3 , excitation wavelength = 355 nm , emission 550 - 800 nm , with a bandpass of 2 nm . a spectrum was recorded for each of the title compounds of examples 67 to 81 . spectra were also recorded for meso - tetraphenylporphyrin ( tpp ), zinc tetraphenylporphyrin ( zn tpp ), and magnesium tetraphenylporphyrin ( mg tpp ) and were found to be within 5 % error of reference values . the fluorescence quantum yield for each of the title compounds of examples 67 to 81 was determined by measuring the integral of the corrected emission spectra for each compound and calculated relative to tpp = 0 . 11 ( handbook of photochemistry ed 2 , murov , carmichael and hug , dekker 1993 ). the fluorescence quantum yield for each of the title compounds of examples 67 to 81 are listed in table 1 ; values for zn tpp and mg tpp are included in table 1 for reference but they were not measured in this work . a stock solution of each of the title compounds of examples 67 to 81 was prepared by dissolving a small sample of the respective title compound in approximately 5 ml of toluene ( fisher scientific , analytical grade ). the exact concentrations of the stock solution was not determined . a working solution of each of the title compounds of examples 67 to 81 was prepared by diluting the respective stock solution with toluene to give an absorbance of 0 . 100 ± 0 . 005 at 355 nm when placed in a ultraviolet / visible spectrometer ( ati - unicam uv - 2 ) compared to a reference cell containing the pure toluene solvent . the ultraviolet / visible spectrum of each sample was also recorded over the range 300 - 700 nm . the final concentration of each of the respective working solutions was estimated by reference to the determined uv extinction coefficient ; each working solution had a concentration in the range 5 - 10 μmol dm − 3 . all of the data were recorded at ambient temperature , 20 - 23 ° c ., and the solutions were aerated . the singlet oxygen emission decay was recorded for each sample using 5 laser energies and the data for each measurement were fitted to an exponential decay of the form i ( t )= a . exp (− t / τ ), where i ( t ) is the measured intensity of singlet oxygen phosphorescence at time t , a is the intensity extrapolated back to t = 0 ( ie when the laser fires ), and τ is the lifetime of singlet oxygen . a typical decay for the title compound of example 78 in toluene excited at 355 nm using a pulse energy of 365 μj , where a = 19 . 6 and τ = 27 . 8 μs , is shown in fig2 . a plot of a versus the incident laser energy was drawn for each sample and the slope determined . the slope of such a graph is proportional to the singlet oxygen quantum yield . an example of a plot showing the linear relationship between the singlet oxygen emission intensity and the laser energy for the title compound of example 78 and meso - tetraphenylporphyrin ( tpp ) is shown in fig3 . the experiments were carried out using batches of 5 samples of the working solution of each of the title compounds of 67 to 81 plus one reference sample meso - tetraphenylporphyrin ( tpp ). each run was repeated at least once . the data sets obtained for each sample were within ± 5 % of the mean value . the dominant sources of error in the experiment include the shot - to - shot fluctuations in the laser and the difference in absorbances of the samples at the excitation wavelength . the values have an error of ± 10 %. the values for each working solution have been recorded relative to meso - tetraphenylporhyrin ( tpp available from aldrich ) which has been reported to have a quantum yield of singlet oxygen production , φ δ , of 0 . 58 ( g . rossbroich , n . a . garcia and s . e . braslavsky , j . photochem . 31 37 ( 1985 )). in the present work , values for this material are cross - calibrated with those of zinc tetraphenylporphyrin ( zn tpp ) and zinc phthalocyanine , obtaining values of 0 . 77 ± 0 . 07 and 0 . 46 ± 0 . 05 respectively . these compare with literature values of 0 . 73 and 0 . 50 ( f . wilkinson , w . p . helman and a . b . ross , j . phys . chem . ref . data ( 1993 ) 22 , 113 - 262 ). this review reports a large number of values for singlet oxygen quantum yields . it is evident that , for any single material , a wide range of values may be obtained . for this reason , a reference material has been used that has been well studied and is closely related to the compounds of interest . a summary of the quantum yield data for the title compounds of examples 67 to 81 is shown in table 2 . values are reported relative to the standard meso - tetraphenylporhyrin having φ δ = 0 . 58 as originally reported by g . rossbroich , n . a . garcia and s . e . braslavsky ; j . photochem . 31 37 ( 1985 ). as discussed above , the recorded values are considered to have an error of ± 10 %. components for med - 6640 film preparation were obtained from nusil technology — europe . solution a and solution b ( approximately 1 : 1 by volume ) were mixed with stirring . the solution of the respective porphyrin of examples 69 to 81 ( see above ) in xylene ( 50 μl per 2 ml of the mixture of solution a and b ) was added to form the photosensitizable mixture . the photosensitizable mixture described above was deposited on a balloon shaped glass former and placed in an oven and heated to 40 ° c . for 2 hours . the temperature was gradually raised to 150 ° c ., maintained at 150 ° c . for 15 minutes and then allowed to cool . the balloon was removed from the former , and the neck and the inflation port of the balloon adapted for engagement with a catheter . a standard silicon based polymeric catheter balloon was sprayed coated with the photosensitizable mixture described above . the coating was cured as described in procedure 1 to form a balloon having a molecular monolayer coating of the photosensitizable compound . a polymeric intraocular lens was spray coated with the photosensitizable mixture of example 86 above and the coating cured as described in example 86 to form an intraocular lens having a molecular monolayer coating of the photosensitizable compound . a polymeric vascular stent was spray coated with the photosensitizable mixture of example 86 above and the coating cured as described in example 86 to form a stent having a molecular monolayer coating of the photosensitizable compound . a layer of gold ( approximately 45 nm ) was deposited on a metallic vascular stent using an edwards 306 vacuum evaporator . a solution of 5 , 5 ′-{ 4 , 4 ′-[ 12 , 12 ′- dithiobis -( dodecyloxy )- phenyl ]}- 10 , 10 ′, 15 , 15 ′, 20 , 20 ′- hexakis -( 3 , 4 , 5 - tridecyloxy - phenyl )- diporphyrinato zinc ( 24 . 99 mg , see example 67 ) in spectroscopic grade cyclohexane ( 100 ml ) was prepared . the gold coated stent was immersed in the diporphyrinato zinc cyclohexane solution for 24 hours . the stent was then rinsed with cyclohexane until the washings were colourless to form a stent having a molecular coating of the photosensitizable compound .
there is provided a compound of formula , wherein r 1 , r 2 , r 3 , r 4 , r 5 , r 6 , r 7 , r 8 , r 9 , x , y 1 , y 2 , y 3 , z , m , a - b and c - d have meanings given in the description , which are useful in the treatment of medical conditions for which a photodynamic compound is indicated . compositions , apparatus and methods of treatment of a medical condition for which a photodynamic compound is indicated are also disclosed .