A small molecular fluorescent sensor for highly selectivity of zinc ion

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• 作者：Cunji GaoAuthor Vitae ; Xiaojie JinAuthor Vitae ; Xuhuan YanAuthor Vitae ; Peng AnAuthor Vitae ; Yu ZhangAuthor Vitae ; Liangliang LiuAuthor Vitae ; Hao TianAuthor Vitae ; Weisheng LiuAuthor Vitae ; Xiaojun YaoAuthor Vitae ; Yu Tang ; ^{tangyu@lzu.edu.cn}Author Vitae
• 关键词：Zinc ion ; Quinoline ; Selectivity ; Fluorescent sensor
• 刊名：Sensors and Actuators B: Chemical
• 出版年：2013
• 出版时间：January, 2013
• 年：2013
• 卷：176
• 期：Complete
• 页码：775-781
• 全文大小：725 K

文摘

A new fluorescent sensor for Zn²⁺ based on 2-methylquinoline has been designed and synthesized. The sensor (1) demonstrates a Zn²⁺-specific emission enhancement linearly by a factor of 14 with a 1:1 binding ratio even in the presence of a wide range of biological cations. This can be correlated to the efficient Zn²⁺ binding of 1 and to the participation of relevant amine functions in the metal coordination which promotes a good chelation-enhanced fluorescence (CHEF) effect and prevents the photoinduced electron transfer (PET) effect. Although the addition of Cd²⁺ also induced an emission enhancement to a certain extent, this enhancement was less pronounced as compared to that of Zn²⁺, which was further demonstrated by DFT calculations.