Yuan-Yuan Guo, Xiaoliang Tang, Fengping Hou
May 1, 2013
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0
Influential Citations
74
Citations
Quality indicators
Journal
Sensors and Actuators B-chemical
Abstract
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. (C) 2013 Elsevier B.V. All rights reserved.