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首页> 外文期刊>RSC Advances >Porphyrin based nano-sized imprinted polymer as an efficient modifier for the design of a potentiometric copper carbon paste electrode
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Porphyrin based nano-sized imprinted polymer as an efficient modifier for the design of a potentiometric copper carbon paste electrode

机译：卟啉基纳米压印聚合物，作为设计电位计铜碳糊电极的有效改性剂

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In this study, a new carbon paste electrode (CPE) modified with porphyrin-based ion imprinted polymer (IIP) was designed and applied for the potentiometric determination of Cu2+ ions in aqueous solutions. The Cu-IIP was prepared using methacrylic acid, ethyleneglycoldimethacrylate monomers, in the presence of a copper complex of 5,10,15,20-tetrakis(4-hydroxyphenyl)-porphyrin. After polymerization, the prepared polymer was eluted by an aqueous solution of hydrochloric acid to leach the imprinted ions, which results in an obvious change in its color from purple to light brown. By microscopic analysis, the mean particle size of the prepared leached IIP was estimated to be around 60 nm. After characterization, the prepared IIP NPs were used as a modifier to design a modified CPE for potentiometric determination of Cu2+ ions in aqueous solutions. As found, at the optimum paste composition, the modified potentiometric sensor exhibited an excellent Nernstian response (30.15 ± 0.2 mV dec?1) to the logarithm of Cu2+ ion concentration over the concentration range of 4.0 × 10?9 to 2.0 × 10?1 mol L?1. Moreover, the designed sensor showed a low detection limit (2.0 × 10?9 mol L?1) with a short response time (～5 s) and acceptable stability (at least 2 months). In addition, the sensor was successfully applied as a reasonable indicator electrode in potentiometric titration (against EDTA) with high precision and accuracy. Applicability of the IIP NP modified CPE was examined and confirmed by analysis of various water samples for the determination of Cu2+ ions.
机译：本研究设计了一种新的用卟啉基离子印迹聚合物（IIP）修饰的碳糊电极（CPE），并将其用于电位计测定Cu 2 + 离子在水溶液中。 Cu-IIP是在5,10,15,20-四（4-羟苯基）-卟啉的铜络合物存在下，使用甲基丙烯酸亚乙基二甲基丙烯酸甘油酯制备的。聚合后，将所制备的聚合物用盐酸水溶液洗脱以浸出印迹的离子，从而导致其颜色从紫色变为浅棕色的明显变化。通过显微镜分析，所制备的浸出的IIP的平均粒度估计为约60nm。表征后，将制备的IIP NPs用作修饰剂，以设计修饰的CPE，用于电位滴定法测定水溶液中的Cu 2 + 离子。可以发现，在最佳糊剂组成下，改进型电位传感器对Cu <的对数表现出极好的Nernstian响应（dec ？1 30.15±0.2 mV） sup> 2 + 离子浓度范围为4.0×10 ？9 至2.0×10 ？1 mol L ？1 。此外，设计的传感器显示出较低的检测限（2.0×10 ？9 mol L ？1 ）响应时间短（〜5 s），稳定性可接受（至少2个月）。此外，该传感器已成功用作高精度滴定法（针对EDTA）中的合理指示电极。对IIP NP改性的CPE的适用性进行了检查，并通过分析各种水样来确定Cu 2 + 离子的适用性。

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