Molecular Engineering of α-Substituted Acrylate Ester Template for Efficient Fluorescence Probe of Hydrogen Polysulfides
作者:Jingru Guo、Sheng Yang、Chongchong Guo、Qinghai Zeng、Zhihe Qing、Zhong Cao、Jishan Li、Ronghua Yang
DOI:10.1021/acs.analchem.7b03755
日期:2018.1.2
recognition unit and 3-benzothiazol-7-hydroxycoumarin dye BHC as signal reporter can highly selectively detect H2Sn over other reactive sulfur species, especially biothiols including cysteine (Cys) and homocysteine (Hcy)/glutathione (GSH), with a rapid and significant turn-on fluorescence response (less than 60 s for response time and over 44-fold for signal-to-background ratio). The fast response and high selectivity
在本文中,利用多硫化氢(H 2 S n)介导的向丙烯酸酯类似物的迈克尔加成/环化级联反应,并首次将其用于构建新颖且稳定的H 2 S n特异性荧光探针。通过对α-取代的丙烯酸酯模板进行合理的分子工程设计,以三氟甲基取代的丙烯酸酯基团为识别单元并以3-苯并噻唑-7-羟基香豆素染料BHC作为信号报告基因的最佳候选探针FP-CF 3可以高度选择性地检测H 2。小号ñ优于其他活性硫物质,尤其是包括半胱氨酸(Cys)和高半胱氨酸(Hcy)/谷胱甘肽(GSH)在内的生物硫醇,具有快速且显着的开启荧光响应(响应时间少于60 s,信号响应少于44倍)与背景之比)。FP–CF 3对H 2 S n的快速响应和高选择性可以归因于H 2 S n与CF 3取代的丙烯酸酯基团的双亲核反应产生的动力学和空间上有利的五环加成。大量的开-关荧光反应是由于五环中间体导致高荧光BHC的释放。此外,它已成功地用于活细胞内源性H 2