New [5]helicene derivatives with large Stokes shifts for Hg2+ determination and their application in drinking water, river water and tuna fillet
Document Type
Article
Publication Date
1-1-2020
Abstract
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.
Keywords
Fluorescence sensor, Mercury ion, Selectivity, [5]helicene
Divisions
CHEMISTRY
Funders
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
Publication Title
Science, Engineering and Health Studies
Volume
14
Issue
1
Publisher
Silpakorn University