用于比色检测铁离子和汞离子的 1,2-方酸菁的双传感性能

Dual Sensing Performance of 1,2-Squaraine for the Colorimetric Detection of Fe and Hg Ions.

作者信息

Liu Xiaoqian, Li Na, Xu Min-Min, Jiang Chunhui, Wang Jianhao, Song Guoqiang, Wang Yong

机构信息

School of Pharmaceutical Engineering and Life Science, Changzhou University, Changzhou 213164, China.

College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China.

出版信息

Materials (Basel). 2018 Oct 16;11(10):1998. doi: 10.3390/ma11101998.

DOI:10.3390/ma11101998

PMID:30332803

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6212916/

Abstract

A simple 1,2-squaraine based chemosensor material (SQ) has been reported to show dual sensing performance for colorimetric detection of Fe and Hg ions. Compared to common instrumental analysis, this method could provide fast and direct detection though colorimetric changes by the naked eye. The sensor has shown excellent selectivity over the other metal ions by tuning different solvent environments. The detection limit for Fe could reach to 0.538 μM, which was lower than that in the environmental agency guideline (U.S. Environmental Protection Agency, U.S. EPA) in drinking water. And for Hg detection, the limit was calculated as 1.689 μM in our case. A 1:1 binding mode between SQ⁻Fe and SQ⁻Hg ion were evidenced by Job's plot measurement and IR analysis. The proposed different binding mechanisms were also supported by Density Function Theory (DFT) calculation. All these findings provide a unique material and a simple, facile, and low cost colorimetric method for dual metal ions analysis and have shown preliminary analytical applications in industrial water sample analysis.

摘要

据报道，一种基于简单1,2-方酸菁的化学传感器材料（SQ）对铁离子和汞离子的比色检测具有双重传感性能。与常见的仪器分析相比，该方法可通过肉眼比色变化实现快速直接检测。通过调节不同的溶剂环境，该传感器对其他金属离子表现出优异的选择性。铁的检测限可达0.538 μM，低于美国环境保护局（U.S. EPA）饮用水环境标准。在我们的案例中，汞的检测限计算为1.689 μM。Job曲线测量和红外分析证明了SQ⁻Fe和SQ⁻Hg离子之间的1:1结合模式。密度泛函理论（DFT）计算也支持所提出的不同结合机制。所有这些发现为双金属离子分析提供了一种独特的材料以及一种简单、便捷且低成本的比色方法，并已在工业水样分析中显示出初步的分析应用。