一种有机磷农药的新型光学分子探针

A Novel Optical Molecular Probe for Organophosphorus Pesticides

有机磷农药（OPPs）作为一类高效、广谱的杀虫剂正在被广泛地应用于农业的防害以及家庭、仓储杀虫等方面，但大量使用后严重危害环境，其检测已成为环境分析和食品安全检测的重要内容．目前常用的农药残留分析方法是建立在色谱仪器专用化、联机化、计算机化基础上的仪器分析方法，如GC，HPLC和GC—MC等，但这些检测方法操作复杂且对设备要求较高，不利于现场使用．光学检测是实现低成本便捷检测的有效途径之一，但传统的光学检测方法只能对“总磷”进行测定，缺少色谱及其相关联用技术所具有的各种区分性．由于不同的有机磷组分毒性差别很大，

A tetranuclear cyclometalated palladium-azo complex（MOP） was synthesized according to our previous work and applied as a differential colorimetric molecular chemosensor for organophosphorus pesticides （OPPs） for the first time. This molecular probe was found to have selective recognition ability to OPPs. In a DMF-acetone mixed solvent, it showed no spectral response to oxophosphate pesticides, but exhibited differential absorption spectra in the presence of different sulfur phosphorus pesticides （SPPs）. In MOP sensing solutions, concentrations of different SPPs could be detected down to a level of 10^-3 g/L by spectrophotometry, which could be used for the determination of SPPs.