亚硫酸盐
化学
荧光
检出限
肉眼
光化学
半胱氨酸
选择性
硫黄
迈克尔反应
无机化学
色谱法
有机化学
催化作用
光学
物理
酶
作者
Mingyu Wu,Ting He,Kun Li,Mingbo Wu,Zheng Huang,Xiao‐Qi Yu
出处
期刊:Analyst
[The Royal Society of Chemistry]
日期:2013-01-01
卷期号:138 (10): 3018-3018
被引量:143
摘要
A real-time colorimetric and ratiometric fluorescent probe based on modulating the intramolecular charge transfer (ICT) of the coumarin platform for selective detection of sulfite is presented. This reaction based probe utilized the Michael addition to the dicyano-vinyl group with the detection limit of 5.8 × 10−5 M. The probe displayed a high selectivity for sulfite over other anions and reactive sulfur especially for biothiols including cysteine (Cys), homocysteine (Hcy) and glutathione (GSH), with about 100 nm blue shift and more than 230 times intensity ratios change of the emission spectrum. Meanwhile, it could be easily observed that the probe for sulfite changes from red to pale yellow by the naked eye, and from red to blue under UV lamp immediately after the sulfite is added. To the best of our knowledge, it is the fastest response probe for sulfite ever reported, which could give a colorimetric and ratiometric fluorescent response instantly.
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