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An Efficient Way for the Recognition of Zinc Ion via the Fluorescence Enhancement
Author(s) -
Sang Qiuguang,
Yang Jingkui
Publication year - 2012
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.201200057
Subject(s) - chemistry , fluorescence , calixarene , metal ions in aqueous solution , acetonitrile , zinc , selectivity , ion , chloroform , photoinduced electron transfer , metal , inorganic chemistry , electron transfer , photochemistry , organic chemistry , molecule , physics , quantum mechanics , catalysis
Abstract This study concentrates on the spectral and complexing properties of a tetraoxycalix[2]arene[2]triazine derivative bearing two bipyridines (Calix‐BIPY2) in a mixture of acetonitrile:chloroform (4:1, V : V ). The results show that Calix‐BIPY2 has a highly selectivity and sensitivity towards Zn 2+ over various competing cations (K + , Cu 2+ , Cd 2+ , Co 2+ , Fe 2+ , Hg 2+ , Ag + , Al 3+ and Pb 2+ ). The complexation of Zn 2+ induces a remarkable fluorescence enhancement due to combination effects of the binding strength, electron spins state of metal ions, photoinduced charge transfer (PCT) and the rigidity of the complexing unit offered by calixarene‐based hosts.