Novel probes based on coumarin-bisdithiocarbamate system for selective recognition of Ag(I) in aqueous solution
作者:Guo Feng Chen、Lin Liu、Jiu Li Wu、Suo Juan Wu、Bao Hua Chen
DOI:10.1007/s11164-017-3173-3
日期:2018.2
a coumarin moiety as fluorophore and a pair of dithiocarbamates as recognition sites, were designed and synthesized as fluorescent probes for Ag+. The probes exhibited high selectivity for Ag+ with fluorescence enhancement (FE) in CH3CN/4-(2-hydroxyethyl)-1-piperazineethanesulfonic acid (HEPES) (1:9, v/v, pH 7.38); the selectivity was not affected by other metal ions. The binding ratio of C2 –Ag+ complex
设计并合成了两种新颖的荧光探针( C1 , C2 ),它们分别是香豆素部分作为荧光团和一对二硫代氨基甲酸酯作为识别位点,作为Ag +的荧光探针。探针在CH 3 CN / 4-(2-羟乙基)-1-哌嗪乙烷磺酸(HEPES)(1:9,v / v,pH 7.38)中表现出对Ag +的高选择性和荧光增强(FE )。选择性不受其他金属离子的影响。根据Job图和质谱(MS)数据确定 C2- Ag +配合物的结合比为 1:1。缔合常数 ķ 一个的Ag +与 C2 为1.6×10 4 M -1。这些探针可用于监测pH范围为5.0–8.0的水溶液中的Ag +,计算出的检出限为0.27μM。