Regulating immobilization performance of metal-organic coordination polymers through pre-coordination for biosensing

文献类型： 外文期刊

第一作者： Yang, Hua

作者： Yang, Hua;Wang, Xinquan;Wang, Xiangyun;Wang, Qiang;Qi, Peipei;Wang, Zhiwei;Xu, Xiahong;Fu, Yingchun;Qi, Xin;Fu, Yingchun;Yao, Shouzhuo

作者机构：

关键词： Electrochemical biosensing;Metal-organic coordination polymers;Enzyme;Nanocomposites

期刊名称：ANALYTICA CHIMICA ACTA （ 影响因子：6.558； 五年影响因子：6.228 ）

ISSN： 0003-2670

年卷期： 2018 年 1005 卷

页码：

收录情况： SCI

摘要： We propose a method for regulating biomolecules immobilization performance of metal-organic coordination polymers (MOCPs) through pre-coordination for highly sensitive biosensing. 2,5-dimercapto-1,3,4-thiadiazole (DMcT) was used as organic monomers. Firstly, using CuCl2 as the source of metal ions to form short oligomers with DMcT (MOCPs(Cu)), which can regulate the length of ligands through precoordination. Then exploiting NaAuCl4 as the source of Au ions to coordinate both short oligomers and biomolecules (MOCPs(C+Au)), since Au ions can coordinate with both N and S atoms. Through controlling the concentration of CuCl2, oligomers with desired length could be readily obtained to prepare MOCPs(Cu+Au) framework with controllable porosity and enzyme entrapment efficiency. Thus MOCPs(Cu+Au) offers several advantages including improved mass transfer efficiency and biocatalytic sensitivity than conventional MOCPs using single metal ions. Glucose oxidase (GOx) was used as the representative biomolecule, the entrapment ratio of enzyme in MOCPs(Cu+Au) case reached an extreme value of 100%. These MOCPs(Cu+Au) biocomposites modified electrode also showed greatly enhanced biocatalytic sensitivity (127 mu A cm(-2) mM(-1)) and very low detection limit (58 nM), compared with those reported analogues. The new materials/strategy may create new avenue to regulate the performance of ligandconstructed polymers and their composites for entrapment-based applications. (C) 2017 Published by Elsevier B.V.

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