基于柔性苯二乙酸Co/Ni配位聚合物的构筑和电化学性能研究

摘要/Abstract

摘要： 基于柔性苯二乙酸水热合成2个配位聚合物([Co(tib)(mpda)(H₂O)₂]·H₂O,[Ni(tib)(mpda)(H₂O)₂]·H₂O)(tib=均苯三咪唑,mpda=间苯二乙酸),利用元素分析、红外光谱、热重分析和X射线单晶衍射等进行表征。在[Co(tib)(mpda)(H₂O)₂]·H₂O的结构中,tib配体作为三节点与Co(II)离子配位形成2D网格面;顺式mpda以端基式附着在2D网格面上;再通过mpda的未配位羧基O与配位水分子之间O—H…O相互作用(O1…O3键长为0.262 4 nm,∠O5—H5A…O2=155.41°)形成三维超分子网络结构。2个配位聚合物属于异质同晶,晶体结构基本一致。2个配位聚合物的比表面积分别为54和58 m²/g,且[Ni(tib)(mpda)(H₂O)₂]·H₂O具有完整的循环伏安曲线(还原、氧化电位分别为0.205、0.563 V)和良好的扫描速率。

关键词: 柔性苯二乙酸, 配位聚合物, 水热合成, 晶体结构, 电化学性能

Abstract: Two coordination polymers ([Co(tib)(mpda)(H₂O)₂]·H₂O, [Ni(tib)(mpda)(H₂O)₂]·H₂O) were synthesized based on flexible phenyldiacetic acid, and characterized by elemental analysis, infrared spectroscopy, thermogravimetric analysis and X-ray single crystal diffraction. In the structure of [Ni(tib)(mpda)(H₂O)₂]·H₂O, the tib ligands coordinate as three nodes with Co(II) ions to form a 2D grid plane; cis-mpda ligands are attached to the 2D grid face as end-bases; through the O—H…O interaction between the mpda virgin carboxyl O and the coordinated water molecule (bond length of O1…O3 is 0.262 4 nm, ∠O5—H5A…O2=155.41°), a three-dimensional supramolecular network structure is formed. Two coordination polymers belong to the heterogeneous crystal structure. The specific surface areas of the two coordination polymers are 54 and 58 m²/g, respectively. [Ni(tib)(mpda)(H₂O)₂]·H₂O has a complete cyclic voltammetric curve (reduction and oxidation potentials are 0.205 and 0.563 V, respectively) and good scanning rate.

Key words: flexible benzodiacetic acid, coordination polymer, hydro-thermal synthesis, crystal structure, electrochemical property

中图分类号:

O641

林涛海, 张军, 葛庆, 张钢强, 张美丽. 基于柔性苯二乙酸Co/Ni配位聚合物的构筑和电化学性能研究[J]. 人工晶体学报, 2024, 53(3): 534-540.

LIN Taohai, ZHANG Jun, GE Qing, ZHANG Gangqiang, ZHANG Meili. Construction and Electrochemical Properties of Co/Ni Coordination Polymer Based on Flexible Phenyldiacetate[J]. JOURNAL OF SYNTHETIC CRYSTALS, 2024, 53(3): 534-540.

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