Abstract A highly selective electrochemical sensor has been developed for the determination of the pesticide molecule, 2,4-dichlorophenol (2,4-DCP) using molecularly imprinted conducting polymer. 2,4-dichlorophenol imprinted polymer films were prepared by electropolymerising 3,4-ethylenedioxythiophene (EDOT) on surface of carbon fiber paper electrode (CFP) in presence of 2,4-dichlorophenol. Electrochemical over-oxidation was carried out for the controlled release of 2,4-DCP templates and to generate definite imprinting sites. Surface morphology of the imprinted electrode was analysed by Scanning Electron Microscopy-Energy Dispersive X-ray Spectrometry, Fourier Transform Infrared and Raman spectroscopy. In optimized conditions, the voltammetric sensor gave a linear response in the range of 0.21 nM – 300 nM. The significantly low detection limit (0.07 nM) demonstrates the ultra-low sensitivity of the method. The imprinted sensor displayed higher affinity and selectivity towards the target 2,4-DCP over similar structural analogical interference than the non-imprinted sensor. MIP sensor was efficaciously employed for the selective determination of 2,4-DCP in real samples of water.

中文翻译：

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碳纤维纸电极上的分子印迹 PEDOT 用于电化学测定 2,4-二氯苯酚

摘要 开发了一种高选择性电化学传感器，用于使用分子印迹导电聚合物测定农药分子 2,4-二氯苯酚 (2,4-DCP)。在 2,4-二氯苯酚存在下，通过在碳纤维纸电极 (CFP) 表面电聚合 3,4-乙二氧基噻吩 (EDOT) 制备 2,4-二氯苯酚印迹聚合物薄膜。进行电化学过氧化以控制 2,4-DCP 模板的释放并产生明确的印记位点。通过扫描电子显微镜-能量色散X射线光谱法、傅里叶变换红外光谱和拉曼光谱分析印迹电极的表面形态。在优化条件下，伏安传感器提供 0.21 nM – 300 nM 范围内的线性响应。极低的检测限（0. 07 nM) 证明了该方法的超低灵敏度。与非印迹传感器相比，印迹传感器对目标 2,4-DCP 显示出更高的亲和力和选择性，而不是类似的结构类比干扰。MIP 传感器有效地用于选择性测定实际水样中的 2,4-DCP。