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An ICT-based chemodosimeter for selective dual channel sensing of cyanide in an aqueous solution†
Analytical Methods ( IF 3.1 ) Pub Date : 2018-05-01 00:00:00 , DOI: 10.1039/c8ay00818c
P. Raja Lakshmi 1, 2, 3, 4, 5 , R. Manivannan 1, 2, 3, 4, 5 , P. Jayasudha 1, 2, 3, 4, 5 , Kuppanagounder P. Elango 1, 2, 3, 4, 5
Affiliation  

Herein, using intramolecular charge transfer (ICT) transition as a signaling mechanism, a quinoline–benzothiazolium hybrid was designed, synthesized, and developed as a dual channel (colorimetric/turn-on fluorometric) sensor for cyanide in aq. HEPES buffer/DMF (70 : 30 v/v; pH 7.2). This receptor can detect cyanide with very high selectivity and instantaneous response. The mechanism of sensing involves nucleophilic addition of CN to the C atom of the C[double bond, length as m-dash]N bond of benzothiazolium moiety. This irreversible addition blocks the π-conjugation and ICT transition between quinoline and benzothiazolium moieties and consequently alters the colour and spectral properties. The results of electronic, fluorescence, and 1H & 13C NMR spectral studies corroborated well with those of the DFT calculations.

中文翻译:

基于ICT的化学计量仪,用于对水溶液中的氰化物进行选择性双通道传感

在本文中,使用分子内电荷转移(ICT)跃迁作为信号传导机制,设计,合成并开发了喹啉-苯并噻唑杂化物作为水溶液中氰化物的双通道(比色/开启荧光)传感器。HEPES缓冲液/ DMF(70:30 v / v; pH 7.2)。该受体可以非常高的选择性和瞬时响应检测氰化物。感测的机制涉及亲核加成CN的-到C的C-原子[双键,长度为m-破折号]苯并噻唑鎓基团的N键。这种不可逆的加成阻止了喹啉和苯并噻唑鎓部分之间的π共轭和ICT过渡,从而改变了颜色和光谱特性。电子,荧光和1 H&13的结果C NMR光谱研究与DFT计算的结果相符。
更新日期:2018-05-01
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