title: New Fluorescent and Colorimetric Chemosensor for Detection of Cyanide with High Selectivity and Sensitivity in Aqueous Media.
abstract: A fluorescent and colorimetric chemosensor for detection of cyanide ion based on a styryl quinoline derivative has been designed and synthesized. The chemosensor (E)-2-(4-mercaptostyryl)quinolin-8-ol L showed high selectivity for detection of cyanide over other anions such as F¯, Cl¯, Br¯, I¯, NO3¯, SCN¯, N3¯, ClO4¯, H2PO4¯, AcO¯, HCO3¯, SO42¯ and HSO4¯in aqueous solution. The chemosensor L displayed an immediate visible and fluorescence changes from nearly colorless to orange and greenish-blue to brick-red upon addition of cyanide ion respectively. It is more likely, these distinct changes can be attributed to hydrogen bonding interaction between phenol group and cyanide anion leading to a 1:1 binding stoichiometry following with deprotonation of phenol group. The detection limit for chemosensor L toward CN¯ was 2.73× 10-8M. Thus, the chemosensor can be used efficiently and selectively for detection and monitoring of small amounts of cyanide ion in aqueous media.
authors.affiliation: Department of Chemistry, University of Isfahan, Isfahan, 81746-73441, Iran. h.zali@chem.ui.ac.ir.
authors.forename: Hassan
authors.initials: H
authors.lastname: Zali-Boeini
authors.affiliation: Department of Chemistry, University of Isfahan, Isfahan, 81746-73441, Iran.
authors.forename: Mohammad
authors.initials: M
authors.lastname: Zareh Jonaghani
mesh_terms: D015374:Biosensing Techniques / Q000379:methods*; D003124:Colorimetry / Q000379:methods*; D003486:Cyanides / Q000032:analysis*; D005456:Fluorescent Dyes / Q000737:chemistry*; D057230:Limit of Detection; D011804:Quinolines / Q000737:chemistry*; D013050:Spectrometry, Fluorescence / Q000379:methods*; D014867:Water / Q000032:analysis*
chemical_list: D003486:Cyanides; D005456:Fluorescent Dyes; D011804:Quinolines; C481600:styrylquinoline; D014867:Water
keywords: Chemosensor; Colorimetric; Cyanide ion; Fluorescence