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A new fluorescent sensor for Zn 2+ based on diarylethene with a 4‐diethylamino‐salicylaldehyde Schiff base unit
Author(s) -
Tian Zhaoyan,
Cui Shiqiang,
Liu Gang,
Wang Renjie,
Pu Shouzhi
Publication year - 2016
Publication title -
journal of physical organic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.325
H-Index - 66
eISSN - 1099-1395
pISSN - 0894-3230
DOI - 10.1002/poc.3552
Subject(s) - diarylethene , chemistry , salicylaldehyde , fluorescence , photochemistry , metal ions in aqueous solution , stoichiometry , schiff base , photoswitch , detection limit , binding constant , photochromism , ion , selectivity , polymer chemistry , organic chemistry , catalysis , binding site , physics , quantum mechanics , biochemistry , chromatography
A new diarylethene with a 4‐diethylamino‐salicylaldehyde unit was synthesized by a Schiff base reaction . The diarylethene could serve as a dual‐controllable photoswitch when triggered by light and metal ions. Upon stimulation with Zn 2+ , its fluorescence intensity was enhanced by threefold with an evident color change from black to bright blue, and no obvious interference was observed by the stimulation of other metal ions under the same experimental conditions. The complexation–decomplexation reaction between the diarylethene and Zn 2+ was reversible with a binding constant of 3.1 × 10 4 L mol −1 . The binding stoichiometry was 1 : 1, and the detection limit was determined to be 2.6 × 10 −7 mol L −1 . Our experimental results demonstrated that the diarylethene could serve as a selective fluorescent sensor for the recognition of Zn 2+ with high sensitivity and selectivity in methanol. Copyright © 2016 John Wiley & Sons, Ltd.