基于扭曲葫芦[14]脲的超分子荧光探针用于检测杀菌剂氟硅唑
Supramolecular Fluorescence Probe Based on Twisted Cucurbit[14]uril for Sensing Fungicide Flusilazole.
作者信息
Fan Ying, Gao Rui-Han, Huang Ying, Bian Bing, Tao Zhu, Xiao Xin
机构信息
State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Guiyang, China.
Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province, Guizhou University, Guiyang, China.
出版信息
Front Chem. 2019 Mar 21;7:154. doi: 10.3389/fchem.2019.00154. eCollection 2019.
The host-guest complex of the common dye, thioflavin T (ThT), and twisted cucurbit[14]uril (Q[14]) 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@Q[14] probe selectively responded to flusilazole with significant fluorescence quenching and a detection limit of 1.27 × 10 mol/L. In addition, the response mechanism involves not only a cooperation interaction-ThT occupies a side-cavity of the Q[14] host and the triazole fungicide occupies another side-cavity of the Q[14] host-but also a competition interaction in which both ThT and the triazole fungicide occupy the side-cavities of the Q[14] host.
选择常见染料硫黄素T（ThT）与扭曲葫芦[14]脲（Q[14]）形成的主客体配合物作为荧光探针，用于测定水溶液中的非荧光三唑类杀菌剂，包括氟硅唑、戊唑醇、三唑酮、戊唑醇、三环唑、粉唑醇、戊菌唑和三唑醇异构体A。实验结果表明，ThT@Q[14]探针能选择性地对氟硅唑产生响应，荧光显著猝灭，检测限为1.27×10 mol/L。此外，响应机制不仅涉及协同相互作用——ThT占据Q[14]主体的一个侧腔，三唑类杀菌剂占据Q[14]主体的另一个侧腔——还涉及竞争相互作用，即ThT和三唑类杀菌剂都占据Q[14]主体的侧腔。
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