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    题名: Ligand-Doped Liquid Crystal Sensor System for Detecting Mercuric Ion in Aqueous Solutions
    作者: Chen, Chih-Hsin;Lin, Yi-Cheng;Chang, Hao-Hsiang;Lee, Adam Shih-Yuan
    日期: 2015-03-31
    上传时间: 2021-05-08 12:10:48 (UTC+8)
    出版者: American Chemical Society
    摘要: We developed a liquid crystal (LC) sensor system for detecting mercuric ion (Hg2+) in aqueous solutions. In this system, 4-cyano-4′-pentyl biphenyl (5CB) was doped with a sulfur- and nitrogen-containing ligand 5-(pyridine-4-yl)-2-(5-(pyridin-4-yl)thiophen-2-yl)thiazole (ZT) as the Hg2+ specific LCs. When the system was immersed in the solution containing Hg2+, the complex of ZT and Hg2+ formed, which disrupted the orientation of LC and lead to a dark-to-bright transition of the image of LCs. From mercuric binding titrations monitored by UV–vis spectroscopy, it was found that 1:1 Hg2+/ZT complexes were formed. The limit of detection (LOD) of the system to Hg2+ is 10 μM, and it did not respond to Cd2+, Zn2+, Cu2+, Pb2+, Fe+, Mg2+, Ca2+, Na+, and K+. Besides, we also demonstrated that this system is capable of detecting Hg2+ in tap water and pond water. Because the signal of this system is colorful under ambient light, which is readily understood by normal users, it can be used as a portable device to monitor the water quality at any location.
    關聯: Anal. Chem. 87(8), p.4546-4551
    DOI: 10.1021/acs.analchem.5b00675
    显示于类别:[化學學系暨研究所] 期刊論文


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