A new multi-functional fluorescent mercuric ion sensor based on diarylethene with triazole-linked rhodamine B unit
作者:Heng Zhao、Huimin Kang、Congbin Fan、Gang Liu、Shouzhi Pu
DOI:10.1016/j.tet.2020.131393
日期:2020.8
proton, and specific metal ions. It also showed highly selectivity and sensitivity to recognize Hg2+ over other interfering heavy and transition metal ions through the spirolactam ring-opening reaction, which could be detected with “naked-eyes”. Upon the treatment with Hg2+, the fluorescence intensity of 1o at 606 nm was enhanced by 88-fold with notable fluorescence color changing from dark to pink
设计并合成了带有三唑连接的若丹明B单元的新型光致变色二芳基乙烯荧光传感器1o。结果表明1o在光,质子和特定金属离子的刺激下具有多响应光开关特性。通过螺内酰胺开环反应,与其他干扰重金属和过渡金属离子相比,它对Hg 2+的识别具有很高的选择性和敏感性,可以用“裸眼”检测到。用Hg 2+处理后,606 nm处1o的荧光强度提高了88倍,显着的荧光颜色从暗变为粉红色。检出限为Hg 2+低至0.13μM。由于若丹明B部分和二芳基乙烯单元之间的FRET,在用297nm光照射时观察到显着的荧光猝灭。此外,建立了一个INHIBIT逻辑门,以紫外线和质子作为双数据输入,以605 nm的荧光强度作为数据输出。