超分子荧光探针对水中敌草快的识别与检测

发布时间：2018-03-06 07:46

本文选题：八元瓜环　切入点：噻唑橙　出处：《广西大学学报(自然科学版)》2016年06期 　论文类型：期刊论文

【摘要】：针对敌草快用量大及水溶性强,易造成农作物农药残留及水资源污染的现状,提出了以八元瓜环为构筑主体,以染料分子噻唑橙(TO)作为客体,构筑了瓜环—染料超分子荧光探针,通过荧光光谱法来检测敌草快(DQ)。噻唑橙(TO)在水溶液中几乎没有荧光,加入八元瓜环(Q[8])后使TO的荧光增强,形成2∶2的稳定复合物。当在Q[8]/TO荧光探针体系中逐渐加入敌草快之后荧光强度又逐渐降低。根据其光谱变化,表明探针Q[8]/TO对敌草快有分子识别作用,由此建立了以Q[8]/TO荧光探针检测水中的敌草快的新方法。实验结果表明其在0~3μmol/L范围内线性关系良好,检测限为8.82×10-9mol/L,其在河水中的回收率可达到105%~106%。
[Abstract]:In view of the present situation that the fast dosage of diphacol is high, the water solubility is strong, the pesticide residues of crops and water resources pollution are easy to be caused, it is put forward that the main body is octadecarboid ring and the dye molecule thiazole orange TOO is taken as the object. A supramolecular fluorescence probe of melon-dye was constructed. The fluorescence spectra were used to detect the fluorescence of DQO. The fluorescence of to was enhanced with the addition of Q [8], and the fluorescence of thiazole Orange TOA was almost no fluorescence in aqueous solution. The stable complex of 2: 2 was formed. The fluorescence intensity of the probe Q [8] / to fluorescence probe system decreased gradually after the addition of dimethylate. According to the spectral changes, it was shown that the probe Q [8] / to had a molecular recognition effect on the dimethylate. A new method using Q [8] / to fluorescence probe for the detection of diphacia in water has been established. The experimental results show that the linear relationship is good in the range of 0 ~ 3 渭 mol/L, the detection limit is 8.82 脳 10 ~ (-9) mol / L, and the recovery rate in the river water reaches 105 ~ 106mol / L.
【作者单位】：贵州大学西南药用生物资源教育部工程研究中心;贵州大学大环化学及超分子化学重点实验室;悉尼大学化学院;澳大利亚联邦科学与工业研究组织制造业;
【基金】：国家自然科学基金资助项目(21202026) 贵州省科学技术基金资助项目(黔科合JZ字[2014]2005号) 教育部春晖计划项目(Z2015004)
【分类号】：X832;O657.3

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