title: A novel fluoride ion colorimetric chemosensor based on coumarin.
abstract: A novel visible colorimetric sensor (L1) with high selectivity for fluoride ion based on coumarin has been synthesized by a simple modification of our earlier report. The chemosensor L1 shows an obvious color change from yellow to blue upon addition of fluoride ion with a large red shift of 145 nm in acetonitrile, and without interference of other anions such as Cl-, Br-, I-, NO3-, H2PO4-, HSO4-, and AcO-. The investigation of 1H NMR spectrum titration indicates the proposed mechanism is that F- first establishes a hydrogen bonding interaction with L1, and then the formation of [F-H-F]- induces deprotonation.
authors.affiliation: Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China.
authors.forename: Xiaoqing
authors.initials: X
authors.lastname: Zhuang
authors.forename: Weimin
authors.initials: W
authors.lastname: Liu
authors.forename: Jiasheng
authors.initials: J
authors.lastname: Wu
authors.forename: Hongyan
authors.initials: H
authors.lastname: Zhang
authors.forename: Pengfei
authors.initials: P
authors.lastname: Wang
mesh_terms: D000838:Anions / Q000032:analysis*; D003124:Colorimetry; D003374:Coumarins / Q000737:chemistry*; D005459:Fluorides / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D011522:Protons; D012545:Schiff Bases / Q000737:chemistry; D013056:Spectrophotometry, Ultraviolet
chemical_list: D000838:Anions; D003374:Coumarins; D011522:Protons; D012545:Schiff Bases; C030123:coumarin; D005459:Fluorides