A simple Michael acceptor type quinoline derivative for highly selective sequential recognition of CN super(-) and Cu super(2+) in aqueous solution

A 2-(quinolin-2-ylmethylene) malononitrile (6) chemosensor has been designed and synthesized. The fluorogenic properties of 6 toward different anions and metal ions were investigated in DMSO/H sub(2)O (1 : 9, v/v) solution. Probe 6 exhibits high selectivity and sensitivity (5.09 10 super(-8) M) to C...

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Published inRSC advances Vol. 5; no. 62; pp. 49953 - 49957
Main Authors Zhu, YuanRong, Li, Hui, Yan, GuoTao, Shi, BingBing, Zhang, YouMing, Lin, Qi, Yao, Hong, Wei, TaiBao
Format Journal Article
LanguageEnglish
Published 01.06.2015
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Summary:A 2-(quinolin-2-ylmethylene) malononitrile (6) chemosensor has been designed and synthesized. The fluorogenic properties of 6 toward different anions and metal ions were investigated in DMSO/H sub(2)O (1 : 9, v/v) solution. Probe 6 exhibits high selectivity and sensitivity (5.09 10 super(-8) M) to CN super(-) as fluorescence "off-on" behavior through Michael addition. Moreover, the in situ formed 6-CN super(-) is further utilized to sense the Cu super(2+) through complexation reaction with high selectivity and fluorescence quenching performance in aqueous water. Probe 6 has selectively detected CN super(-) in real water sample, and on test strips. The FTIR, super(1)HNMR and ESI-MS spectroscopy supported the proposed mechanism of interaction.
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ISSN:2046-2069
DOI:10.1039/c5ra08238b