Construction of a new ionic Co(II) coordination polymer and its composite with CNTs showing dual electrochemical sensing to AA and Fe3+

被引:2
作者
Zong, Si-Wei [1 ]
Yang, Yuan-Wen [1 ]
Xie, Ju [1 ]
Yang, Wan-Wan [1 ]
Zhang, Kou-Lin [1 ]
机构
[1] Yangzhou Univ, Sch Chem & Chem Engn, Yangzhou 225002, Peoples R China
关键词
Co(II) coordination polymer; Electrochemical sensing; Practical detection; Ascorbic acid; Fe3+; METAL-ORGANIC FRAMEWORKS; ASCORBIC-ACID; PHOTOCATALYTIC PROPERTIES; CRYSTAL-STRUCTURES; ANION FRAMEWORK; URIC-ACID; PERFORMANCE; SENSOR; WATER; MOF;
D O I
10.1016/j.molstruc.2024.140491
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
A new ionic cobalt(II) chain coordination polymer, {[Co(bbbm)(H2O)4]center dot ATBIP center dot 2DMA center dot 2H2O}n (Co-CP) with the multi-functional 5-amino-2,4,6-tribromoisophthalic acid (H2ATBIP) and flexible linker 1, 4-bis(benzimidazole-1methyl)benzene (bbbm) was prepared with convenient slow evaporation method. Moreover, its composite with hydroxyl carbon nanotubes (CNTs) (Co-CP@CNTs) was constructed by "one pot" synthesis. Co-CP further assembles into a 3D supramolecular framework with 1D channels with the aid of the hydrogen-bonded tape. The amperometric response demonstrates that Co-CP/GCE and Co-CP@CNTs/GCE show sensitive and selective electrochemical oxidation sensing to ascorbic acid (AA) and reduction sensing to Fe3+ in 0.1 M H2SO4, respectively. Moreover, Co-CP@CNTs exhibits better electrocatalytic capability for the oxidation sensing of AA and reduction sensing of Fe3+ than that of Co-CP. Remarkably, the strategy was successfully applied in the portable screen-printed electrode (SPE). Among three electrodes, the Co-CP@CNTs/SPE shows the most rapid and sensitive sensing with the largest exponential range of 0.01 - 26 mM for AA and 0.01 - 21 mM for Fe3+, respectively. The limits of detection (LOD) reach to 0.74 mu M (AA) and 0.96 mu M (Fe3+) for Co-CP@CNTs/GCE, 0.32 mu M (AA) and 0.91 mu M (Fe3+) for Co-CP@CNTs/SPE, respectively. Furthermore, the portable CoCP@CNTs/SPE has been successfully used as a platform for the practical detection of AA and Fe3+ in the realworld samples.
引用
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页数:15
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