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A selective "turn-on" sensor for recognizing In3+ and Zn2+ in respective systems based on imidazo[2,1-b]thiazole.
Photochemical & Photobiological Sciences ( IF 2.7 ) Pub Date : 2020-02-05 , DOI: 10.1039/c9pp00408d
Yuankang Xu 1 , Songfang Zhao , Yanxia Zhang , Hanyu Wang , Xiaofeng Yang , Meishan Pei , Guangyou Zhang
Affiliation  

A new simple and easily synthesized multitarget sensor, (E)-N'-(4-(diethylamino)-2-hydroxybenzylidene)imidazo[2,1-b]thiazole-6-carbohydrazide (X), was designed and synthesized using imidazo[2,1-b]thiazole-6-carboxylic acid and 4-(diethylamino)-2-hydroxybenzaldehyde. X could be used as a sensor to detect In3+ in DMF-H2O buffer solution and detect Zn2+ in EtOH-H2O buffer solution through fluorescence enhancement with detection limits of 1.02 × 10-9 M and 5.5 × 10-9 M, respectively. X exhibited an efficient "off-on-off" fluorescence behavior by cyclic addition of metal ions (In3+ and Zn2+) and EDTA. The stoichiometry between X and metal ions (In3+ and Zn2+) was 1 : 1. The binding mode and sensing mechanism of X with metal ions (In3+ and Zn2+) was verified by theoretical calculations using Gaussian 09 based on B3LYP/6-31G(d) and B3LYP/LANL2DZ basis, respectively. Moreover, X could be applied as a potential sensor for the quantitative detection of In3+ and Zn2+ with a satisfactory recovery and relative standard deviation (RSD) in real water samples.

中文翻译:

一种基于咪唑并[2,1-b]噻唑的选择性“接通”传感器,用于识别各个系统中的In3 +和Zn2 +。

设计并合成了一种新的简单易合成的多目标传感器(E)-N'-(4-(二乙氨基)-2-羟基苄叉)咪唑并[2,1-b]噻唑-6-碳酰肼(X)。 [2,1-b]噻唑-6-羧酸和4-(二乙氨基)-2-羟基苯甲醛。X可以用作传感器,通过荧光增强检测DMF-H2O缓冲溶液中的In3 +并检测EtOH-H2O缓冲溶液中的Zn2 +,检出限分别为1.02×10-9 M和5.5×10-9M。X通过循环添加金属离子(In3 +和Zn2 +)和EDTA,表现出有效的“ on-on-off”荧光行为。X和金属离子(In3 +和Zn2 +)之间的化学计量比为1:1。X分别基于B3LYP / 6-31G(d)和B3LYP / LANL2DZ在高斯09上通过理论计算验证了X与金属离子(In3 +和Zn2 +)的结合模式和传感机理。此外,X可以用作电位传感器,用于定量检测In3 +和Zn2 +,在真实水样中具有令人满意的回收率和相对标准偏差(RSD)。
更新日期:2020-02-19
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