title: Relay recognition of Cu2+ and S2- in water by a simple 2-(2'-aminophenyl)benzimidazole derivatized fluorescent sensor through modulating ESIPT.
abstract: A new 2-(2'-aminophenyl)benzimidazole (2-APBI) derivatized fluorescent sensor (L) that behaves relay recognition of Cu(2+) and S(2-) in water solution (pH 7.4) has been developed. Sensor L displays excited-state intramolecular proton transfer (ESIPT) featured two emission bands and performs highly selective and sensitive recognition to Cu(2+) through two emissions simultaneous quenching. The on-site formed L-Cu(2+) complex exhibits excellent selectivity to S(2-) with fluorescence "off-on" response via Cu(2+) displacement approach, which exerts ESIPT recovery. Thus, through modulation the ESIPT state of sensor L, relay recognition of Cu(2+) and S(2-) in water has been achieved.
authors: College of Chemistry and Chemical Engineering, Liaoning Provincial Key Laboratory for the Synthesis and Application of Functional Compounds, Bohai University, Jinzhou 121013, China. Electronic address: ljtang@bhu.edu.cn.
authors: Lijun
authors: L
authors: Tang
authors: College of Chemistry and Chemical Engineering, Liaoning Provincial Key Laboratory for the Synthesis and Application of Functional Compounds, Bohai University, Jinzhou 121013, China.
authors: Xin
authors: X
authors: Dai
authors: College of Chemistry and Chemical Engineering, Liaoning Provincial Key Laboratory for the Synthesis and Application of Functional Compounds, Bohai University, Jinzhou 121013, China.
authors: Mingjun
authors: M
authors: Cai
authors: College of Chemistry and Chemical Engineering, Liaoning Provincial Key Laboratory for the Synthesis and Application of Functional Compounds, Bohai University, Jinzhou 121013, China.
authors: Jia
authors: J
authors: Zhao
authors: College of Chemistry and Chemical Engineering, Liaoning Provincial Key Laboratory for the Synthesis and Application of Functional Compounds, Bohai University, Jinzhou 121013, China.
authors: Pei
authors: P
authors: Zhou
authors: College of Chemistry and Chemical Engineering, Liaoning Provincial Key Laboratory for the Synthesis and Application of Functional Compounds, Bohai University, Jinzhou 121013, China.
authors: Zhenlong
authors: Z
authors: Huang
mesh_terms: D000838:Anions / Q000032:analysis; D001562:Benzimidazoles / Q000737:chemistry*; D002413:Cations, Divalent / Q000032:analysis; D003300:Copper / Q000032:analysis*; D005456:Fluorescent Dyes / Q000737:chemistry*; D013050:Spectrometry, Fluorescence; D013440:Sulfides / Q000032:analysis*; D014867:Water / Q000032:analysis*
chemical_list: C412329:2-(2'-aminophenyl)benzimidazole; D000838:Anions; D001562:Benzimidazoles; D002413:Cations, Divalent; D005456:Fluorescent Dyes; D013440:Sulfides; D014867:Water; D003300:Copper
keywords: Copper detection; ESIPT; Relay recognition; Sulfide recognition