text: New [5]helicene derivatives with large Stokes shifts for Hg2+ determination and their application in drinking water, river water and tuna fillet - UM Research Repository
  Petdum, Anuwut and Sirirak, Jitnapa and Lee, Vannajan Sanghiran and Nienaber, Hubert A. and Panchan, Waraporn and Sooksimuang, Thanasat and Wanichacheva, Nantanit (2020) New [5]helicene derivatives with large Stokes shifts for Hg2+ determination and their application in drinking water, river water and tuna fillet. Science, Engineering and Health Studies, 14 (1). pp. 32-46. ISSN 2630-0087,
  Official URL: https://li01.tci-thaijo.org/index.php/sehs/article...
  Two novel [5]helicene-based fluorescence sensors. H1 (2,2'-((propane-1.3-diylbis(sulfanediyl))bis(ethane-2,1-diyl))bis(7,12-dhnethoxy-4,5,14,15-tetrahydro-1H-dinaplitho[2,1-e:1',2'-g]isoindole-1,3(2H)-dione) and H1A (2,2'(propaiie-1,3-diylbis(sulfanediyl))bis(ethaiie-2,1-diyl))bis(7,12-dimemoxy-1H-dinaphtho[2,1'-e:1',2'g]isoiiidole-l, 3(2H)-dione) were successfully prepared and characterized for their application in the determination of Hg2+ ions. The syntheses of H1 and H1A involved simple reactions including alkylation and imide formation. The spectroscopic results of H1 and H1 A showed strong fluorescence in the visible region and large Stokes shifts (150-200 nm). Sensors provided Hg2+-selective fluorescence quenching by discriminating interfering ions including Cd2+, Co2+, Zn2+ Pb2+, Ag+ and Cu2+. The binding mode of the sensors was also explored using molecular modeling. In addition. H1 showed the potential to determine Hg2+ in real samples such as drinking water, river water and tuna fillet. © 2020 Science, Engineering and Health Studies. All rights reserved.
  Grant RSA 6080058 from the Thailand Research Fund and Faculty of Science, Silpakorn University, Thailand, Thailand Graduate Institute of Science and Technology (TGIST, Grant TG-33-16-59-012D) from National Science and Technology Development Agency (NSTDA), Thailand