Relay recognition of Cu2+ and S2- in water by a simple 2-(2'-aminophenyl)benzimidazole derivatized fluorescent sensor through modulating ESIPT

Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
Lijun TangZhenlong Huang

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.

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Citations

Sep 12, 2015·Materials Science & Engineering. C, Materials for Biological Applications·Jing-Can Qin, Zheng-Yin Yang
Apr 19, 2016·Luminescence : the Journal of Biological and Chemical Luminescence·Lijun TangYanjiang Bian
Jan 16, 2015·Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy·Jing-can QinBao-dui Wang
Apr 9, 2020·Dalton Transactions : an International Journal of Inorganic Chemistry·Chak-Shing KwanKen Cham-Fai Leung
Jul 18, 2014·Chemical Communications : Chem Comm·Fabiao YuLingxin Chen
Oct 25, 2017·Journal of Fluorescence·Muhammad SaleemSung-Yum Seo

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