A reversible fluorescent chemosensor for cyanide in 100 % aqueous solution

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• 作者：Yuan-Yuan GuoAuthor Vitae ; Xiao-Liang TangAuthor Vitae ; Feng-Ping HouAuthor Vitae ; Jiang WuAuthor Vitae ; Wei DouAuthor Vitae ; Wen-Wu QinAuthor Vitae ; Jia-Xi RuAuthor Vitae ; Guo-Lin Zhang ; ^{zhanggl@lzu.edu.cn}Author Vitae ; Wei-Sheng Liu ; ^{liuws@lzu.edu.cn}Author Vitae ; Xiao-Jun YaoAuthor Vitae
• 关键词：Cyanide ; Mercury ; Chemosensor ; Reversible fluorescence ; Biological imaging ; Aqueous solution
• 刊名：Sensors and Actuators B: Chemical
• 出版年：2013
• 出版时间：May, 2013
• 年：2013
• 卷：181
• 期：Complete
• 页码：202-208
• 全文大小：1152 K

文摘

A new fluorescent chemosensor, sodium 2-(2-(1H-benzo[d]imidazol-2-yl)quinolin-8-yloxy)acetate (HL), based on 8-hydroxyquinoline derivative has been designed, synthesized and characterized. Once combined with Hg²⁺ in aqueous solution, HL displays a fluorescence quenching effect to form the compound mercury(II) 2-(2-(1H-benzo[d]imidazol-2-yl)quinolin-8-yloxy)acetate chloride (LHg), which could be fast dissociated by the addition of cyanide in this system so that ¡°ON-OFF-ON¡± type fluorescence change can be achieved. Cyanide induces the revival of fluorescence of LHg and results in ¡°OFF-ON¡± type sensing with high sensitivity and rapid response in 100 % aqueous system. Furthermore, the fluorescence microscopic imaging also indicates that LHg is suitable for the detection of CN^? in biological environment.