A Ratiomeric Fluorescent Sensor for Zn2+ Based on N,N′-Di(quinolin-8-yl)oxalamide
作者:Fashuo Yu、Xiangfeng Guo、Xiujuan Tian、Lihua Jia
DOI:10.1007/s10895-016-2003-0
日期:2017.3
new ratiometric fluorescent sensor (DQO) based on N,N′-Di(quinolin-8-yl) oxalamide has been designed and synthesized for selective detection of Zn2+. The fluorescence ratio (I 536 nm/I 450 nm) of DQO was enhanced 10-fold when Zn2+ was present in a buffer aqueous solution at pH 8.66. The sensor showed linear response toward Zn2+ in the concentration range 0–15 μM, and the detection limit was calculated
设计并合成了一种新型的基于N,N'-二(喹啉-8-基)草酰胺的比例荧光传感器(DQO),用于Zn 2+的选择性检测。当pH值为8.66的缓冲水溶液中存在Zn 2+时,DQO的荧光比(I 536 nm / I 450 nm)提高了10倍。传感器在0-15μM的浓度范围内对Zn 2+表现出线性响应,计算出的检出限为2.4μM。作业的曲线图暗示一个DQO /锌的形成2+复合物与1:1个的化学计量比,和DQO /锌的表观缔合常数2+复合物计算为1.5×10 4 M -1。