Original Research ARTICLE
Supramolecular fluorescence probe based on twisted cucurbituril for sensing fungicide flusilazole
- 1Guizhou University, China
- 2Shandong University of Science and Technology, China
The host-guest complex of the common dye, thioflavin T (ThT) and twisted cucurbituril (tQ) was selected as a fluorescent probe to determine non-fluorescent triazole fungicides, including flusilazole, azaconazole, triadimefon, tebuconazole, tricyclazole, flutriafol, penconazole, and triadimenol isomer A, in an aqueous solution. The experimental results reveal that the ThT@tQ probe selectively responded to flusilazole with significant fluorescence quenching and a detection limit of 1.27 × 10−8 mol/L. In addition, the response mechanism involves not only a cooperation interaction¾ThT occupies a side-cavity of the tQ host and the triazole fungicide occupies another side-cavity of the tQ host—but also a competition interaction in which both ThT and the triazole fungicide occupy the side-cavities of the tQ host.
Keywords: Twisted cucurbituril, thioflavin T, Fluorescent probe, Triazole fungicides, Flusilazole
Received: 30 Aug 2018;
Accepted: 01 Mar 2019.
Edited by:Angela Casini, Cardiff University, United Kingdom
Reviewed by:Simin Liu, Wuhan University of Science and Technology, China
Dong-Sheng Guo, Nankai University, China
Copyright: © 2019 Fan, Gao, Huang, Bian, Zhu and Xiao. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
Prof. Tao Zhu, Guizhou University, Guiyang, China, email@example.com
Prof. Xin Xiao, Guizhou University, Guiyang, China, firstname.lastname@example.org