Ligand-variable metal clusters charge transfer in Ce-Por-MOF/AgNWs and their application in photoelectrochemical sensing of ronidazole

文献类型： 外文期刊

第一作者： Kang, Jinsheng

作者： Kang, Jinsheng;Li, Jianping;Ma, Xionghui;Wu, Yuwei;Pang, Chaohai;Li, Shuhuai;Luo, Jinhui;Wang, Mingyue;Xu, Zhi;Ma, Xionghui;Wu, Yuwei;Pang, Chaohai;Li, Shuhuai;Luo, Jinhui;Wang, Mingyue;Xu, Zhi;Xiong, Yuhao

作者机构：

关键词： Metal-organic frameworks; Photoelectrochemical sensor; Ligand-variable metal clusters charge transfer; Silver nanowires; Molecular imprinting

期刊名称：MICROCHIMICA ACTA （ 影响因子：6.408； 五年影响因子：5.888 ）

ISSN： 0026-3672

年卷期： 2022 年 189 卷 10 期

页码：

收录情况： SCI

摘要： A photoelectrochemical sensing platform based on ligand-variable metal clusters charge transfer was established for the quantitative assay of ronidazole (RNZ) using Ce-porphyrin-metal-organic frameworks/silver nanowires (Ce-Por-MOFs/AgNWs). Rod-like Ce-Por-MOFs and well-dispersed sub-50 nm AgNWs were prepared using a hydrothermal method and polyol strategy, and then through simple drop coating to yield Ce-Por-MOFs/AgNWs nanocomposites. We investigated the intrinsic semiconducting properties of the composites. More importantly, it was found that the variable-valence metal node can provide electronic defect states similar to those caused by multi-metal doping, synergizing with the surface plasmon effect of AgNWs, which significantly improved the photoelectric conversion efficiency, thereby resulting in excellent optoelectronic properties. In combination with molecular imprinting, a competitive type trace photoelectrochemical sensor for RNZ was constructed using Fe2+ as the electron donor and probe. Under optimal conditions, the sensor response is proportional to the logarithm of RNZ concentration in the range 0.1-104 nM with a detected limit of 0.038 nM. The recoveries ranged from 87.2 to 116% with relative standard deviations (RSDs) < 6.5% (n = 3) in milk sample. This work reveals the charge-transfer process of variable-valence metal nodes in MOFs during photoelectrochemical processes, which will provide new insights for the sensing application of variable-valence metal MOFs.

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