Synthsis and Properties of Oligo-para-phenylene Substituted Porphyrins
A series of oligo-para-phenylene (OPP) substituted new porphyrins was prepared by the combinations of aryl coupling reactions and Lindsey’s pyrrole condensation reactions. Low field shifts of OPP protons in 1H-NMR spectra became larger when the protons locate closer to the center of the molecule.