Simple Michael acceptor type coumarin derived turn-on fluorescence probes to detect cyanide in pure water
作者:Syed S. Razi、Rashid Ali、Priyanka Srivastava、Arvind Misra
DOI:10.1016/j.tetlet.2014.03.087
日期:2014.4
design and synthesis of coumarin derived chemical reaction based chemodosimeter to recognize cyanide in aqueous medium. The Michael acceptor type coumarin derived probes 3 and 4 upon interaction with cyanide undergo Michael type nucleophilic addition reaction to form adducts in which fluorescence intensity was significantly enhanced, ‘turn-on’ by the change in intramolecular charge transfer (ICT) mechanism
本文介绍了香豆素衍生的基于化学反应的化学计量仪的设计和合成,以识别水性介质中的氰化物。与氰化物相互作用时,迈克尔受体香豆素型香豆素衍生的探针3和4经历迈克尔型亲核加成反应,形成加合物,其中荧光强度显着增强,通过分子内电荷转移(ICT)机理的改变“打开”。溶液的非荧光色变为肉眼敏感的荧光蓝(已打开)。Job的图分析显示,探针与氰化物阴离子之间的相互作用具有1:1的化学计量比,具有很高的检出限。