New [5]helicene derivatives with large Stokes shifts for Hg2+ determination and their application in drinking water, river water and tuna fillet

• Main Authors: Petdum, Anuwut, Sirirak, Jitnapa, Lee, Vannajan Sanghiran, Nienaber, Hubert A., Panchan, Waraporn, Sooksimuang, Thanasat, Wanichacheva, Nantanit
• Format: Article
• Published: Silpakorn University 2020
• Subjects: Q Science (General); QD Chemistry
• Online Access: http://eprints.um.edu.my/25401/; https://li01.tci-thaijo.org/index.php/sehs/article/view/197176
• Institution: Universiti Malaya

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.