一个基于多羧酸刚性配体的镉配合物的合成、结构及质子传导性研究  

One Cd-MOFs based on the Multi-carboxylate Rigid Ligand:Synthesis,Structure and Proton Transfer Property

作　　者：初芷同 何占宇 刘厚亭 卢静 王素娜 CHU Zhi-tong;HE Zhan-yu;LIU Hou-ting;LU Jing;WANG Su-na(Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology,School of Chemistry and Chemical Engineering,Liaocheng University,Liaocheng 252059,China)

机构地区：[1]聊城大学化学化工学院山东省化学储能与新型电池技术重点实验室

出　　处：《聊城大学学报（自然科学版）》2020年第1期47-52,62,共7页Journal of Liaocheng University:Natural Science Edition

基　　金：国家自然科学基金项目（21571092）;山东省大学生创新创业计划项目（201910447055）;聊城大学校基金项目（318011510,318011512）资助

摘　　要：以刚性含氮杂环多羧酸配体与醋酸镉为原料,采用水热技术合成了配合物{[Cd3(L)2}n(1).通过元素分析、红外光谱、粉末以及单晶X-射线衍射等测试手段对其组成和结构进行了表征.单晶X-射线结构分析表明:配合物1中,三个相邻的Cd(Ⅱ)离子通过L 3-配体苯环上的羧基连接形成三核次级结构单元[Cd3(CO2)6],这些次级结构单元进一步通过L 3-配体吡啶环上的氮原子和羧酸基团连接形成了三维网状配位聚合物.对配合物进行了质子传导性能研究,结果表明:以配合物1掺杂的Nafion复合膜在纯水和硫酸溶液中均表现出比空白Nafion更为优良的质子传导性能,且随温度或酸度的增加,质子传导性能增强.质子传导机理研究表明,配合物1的质子传导是按Grotthuss机理进行的.Coordination polymer{[Cd3(L)2}n(1)has been synthesized by the hydrothermal reaction of the aromatic multi-carboxylate ligand and Cd(CH 3 COO)2·2H2O,which was characterized by the element analysis,IR spectrum,powder X-ray diffraction.The single crystal X-ray diffraction studies reveal that three Cd(Ⅱ)cations are connected by the carboxylate groups of L ligand to form trinuclear[Cd3(CO2)6]sub-structure unit,which are further linked to form 3-D coordination network.The alternating current impedance spectroscopies studies reveal that doping compound 1 with Nafion can promote its proton conductivity in neutral and acidic solution,and the proton conductivity of this composite membrane improves along with the temperature and acidity.The study of proton conduction mechanism shows that the proton conduction of the composite obeys the Grotthuss mechanism.

关 键 词：金属-有机骨架 水热合成 晶体结构 质子传导 

分 类 号：O611[理学—无机化学]