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    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/118705


    Title: Agarose dispersed liquid crystals as a soft sensing platform for detecting mercuric ions in water
    Authors: Huang, J.-W.;Chang, J.-J.;Yang, R.-H.;Chen, C.-H.*
    Keywords: Agarose dispersed liquid crystals;Agarose;Liquid crystal-based sensor;Liquid crystal droplets;5CB;Detection of mercuric ion
    Date: 2019-09-19
    Issue Date: 2020-06-01 12:14:41 (UTC+8)
    Publisher: Springer
    Abstract: In this work, we report the development of liquid crystal (LC) droplets dispersed in agarose gel as a matrix, i.e., agarose dispersed liquid crystals (ADLCs), which are used as a soft sensing platform for detecting mercuric ions (Hg2+) in water. The LC droplets were prepared by a nematic LC, 4-cyano-4′-pentylbiphenyl (5CB), doped with a Hg2+-selective ligand, 5-(pyridine-4-yl)-2-(5-(pyridin-4-yl)thiophen-2-yl)thiazole (ZT). When the solution containing Hg2+ was dispensed on the ADLCs films, the formation of Hg2+/ZT complexes led to a distinct radial-to-irregular configurational transition of the LC droplets that can be simply differentiated by naked eye under ambient light. The detection of Hg2+ by using the ADLCs was real time (responses within 20 s), highly specific, reusable and insensitive to pH change, and its activity was able to maintain more than 3 months. In addition, we demonstrated that the ADLCs could be used to detect Hg2+ in tap water, pond water, river water and seawater. Because the free motion of LC droplets is restricted in ADLCs, it could be a precise and convenient approach for the qualitative and quantitative determination of the signals of LC droplets in a series of experiments, which enhanced the reliability of the LC droplets-based sensing platform.
    Relation: Research on Chemical Intermediates 45, 5409-5423
    DOI: 10.1007/s11164-019-03978-y
    Appears in Collections:[Graduate Institute & Department of Chemistry] Journal Article

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