Li Gang, Yuan Baiqing, Chen Sidi, Gan Liju, Xu Chunying
School of Chemistry and Materials Science, Ludong University, Yantai 264025, China.
Nanomaterials (Basel). 2022 Aug 26;12(17):2953. doi: 10.3390/nano12172953.
Covalent organic frameworks (COFs) are a new type of metal-free porous architecture with a well-designed pore structure and high stability. Here an efficient electrochemical sensing platform was demonstrated based on COFs TpPa-1 constructed by 1,3,5-triformylphloroglucinol (Tp) with p-phenylenediamine (Pa-1), which possesses abundant nitrogen and oxo-functionalities. COFs TpPa-1 exhibited good water dispersibility and strong adsorption affinities for Pd and thus was used as loading support to modify Pd. The Pd-modified COFs TpPa-1 electrode (Pd/COFs) showed high electrocatalytic activity for both hydrazine oxidation reaction and nitrophenol reduction reaction. In addition, TpPa-1-derived nitrogen-doped carbon presented high activity for the electro-oxidation of reduced glutathione (GSH), and sensitive electrochemical detection of GSH was achieved. The presented COFs TpPa-1 can be utilized as a precursor as well as support for anchoring electro-active molecules and nanoparticles, which will be useful for electrochemical sensing and electrocatalysis.
共价有机框架（COFs）是一种新型的无金属多孔结构，具有精心设计的孔结构和高稳定性。本文展示了一种基于由1,3,5-三（对甲酰基苯基）苯（Tp）与对苯二胺（Pa-1）构建的COFs TpPa-1的高效电化学传感平台，该材料具有丰富的氮和含氧官能团。COFs TpPa-1表现出良好的水分散性以及对钯的强吸附亲和力，因此被用作负载载体来修饰钯。钯修饰的COFs TpPa-1电极（Pd/COFs）对肼氧化反应和硝基苯酚还原反应均表现出高电催化活性。此外，TpPa-1衍生的氮掺杂碳对还原型谷胱甘肽（GSH）的电氧化表现出高活性，并实现了对GSH的灵敏电化学检测。所展示的COFs TpPa-1可作为前体以及用于锚定电活性分子和纳米颗粒的载体，这将对电化学传感和电催化有用。
