基于Ag^(+)金属中心的硅钨杂多酸配位聚合物的合成及其电化学性能研究  

Synthesis and electrochemical properties of coordination polymer of silicotungstic heteropoly acid based on Ag^(+)metal center

作　　者：王晓芳 骆昱晖 付俊杰 WANG Xiao-Fang;LUO Yu-Hui;FU Jun-Jie(State Key Laboratory of Titanium and Vanadium Testing,Panzhihua University,Panzhihua 617000,China;Vanadium and Titanium Resource Comprehensive Utilization Key Laboratory of Sichuan Province,Panzhihua University,Panzhihua 617000,China;School of Environmental and Chemical Engineering,Jiangsu Ocean University,Lianyungang 222000,China)

机构地区：[1]攀枝花学院国家钒钛检测重点实验室,攀枝花617000 [2]攀枝花学院钒钛资源综合利用四川省重点实验室,攀枝花617000 [3]江苏海洋大学,连云港222000

出　　处：《四川大学学报（自然科学版）》2023年第6期173-179,共7页Journal of Sichuan University(Natural Science Edition)

基　　金：四川省自然科学基金(2022NSFSC0255);攀枝花学院博士科研启动经费项目。

摘　　要：本文利用水热合成法得到了一种基于银离子金属中心的硅钨杂多酸(H_(3)SiW_(12)O_(40))配位聚合物材料([Ag_(4)(BPB)_(4)SiW_(12)O_(40)])(简称,化合物1).单晶X-射线衍射分析表明,结构中存在Ag1、Ag2和Ag3三种银离子,分别采用2、3、4配位的方式通过Ag-N键连接有机配体,又通过Ag-O键连接多酸分子.Ag1连接有机配体形成左手、右手螺旋链,并连接多酸分子形成梯形链.Ag2连接有机配体和多酸分子形成二维4,4-sql拓扑格子层,梯形链与格子层共用多酸分子.Ag3连接有机配体形成一维链贯穿于二维层,最终形成整体的三维结构.此外,利用复合改性玻碳电极(GCE)作为工作电极对材料的电化学性能进行了研究.电化学分析结果表明,材料可作为还原NaNO_(3)的电催化剂.In this work,a coordination polymer material([Ag_(4)(BPB)_(4)SiW_(12)O_(40)])(Complex 1)based on silicotungstic heteropoly acid(H_(4)SiW_(12)O_(40))and silver ion metal center was synthesized by hydrothermal synthesis method.The single crystal X-ray diffraction analysis showed that there were three kinds of silver ions Ag1,Ag2 and Ag3 with coordination numbers of 2,3,and 4,respectively.The Ag metal center is coordinated with N of the organic ligands and O of the polyacids.Ag1 connects organic ligands to form left-and right-handed helical chains,and connects polyacid molecules to form trapezoidal chains;Ag2 connects organic ligands and polyacid molecules to form a two-dimensional 4,4-sql lattice layer,sharing polyacid molecules with trapezoidal chains;Ag3 connects organic ligands to form one-dimensional chain through the two-dimensional layer,ultimately forming the overall three-dimensional structure.The electrochemical performance of the material was studied using a composite modified glassy carbon electrode(GCE)as the working electrode,and electrochemical analysis showed that the material can be used as an electrocatalyst for the reduction of NaNO_(3).

关 键 词：配位聚合物 杂多酸 水热合成 电化学 

分 类 号：O631[理学—高分子化学]