两个酸性Co(Ⅱ)配合物的合成、结构及质子传导性研究  

Syntheses,Structures and Proton Conduction Properties of Two Acidic Co(Ⅱ)-CPs

作　　者：初芷同 李荣云 刘厚亭[1] 卢静[1] 王素娜[1] CHU Zhitong;LI Rongyun;LIU Houting;LU Jing;WANG Suna(Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology,School of Chemistry and Chemical Engineering,Liaocheng University,Liaocheng,252059 PR China)

机构地区：[1]聊城大学山东省化学储能与新型电池技术重点实验室化学化工学院,山东聊城252059

出　　处：《聊城大学学报（自然科学版）》2021年第3期71-82,共12页Journal of Liaocheng University:Natural Science Edition

基　　金：国家自然科学基金项目(21101086);山东省大学生创新训练计划(cxcy2019z037)资助。

摘　　要：利用水热技术成功合成了两个Co(Ⅱ)配合物[Co(H_(2)L)(bpyBr)_(2)]・2H_(2)O(1)和[Co_(2)(H_(2)L)_(2)(bpyBr)_(2)(H_(2)O)_(3)]_(n)(2)(H_(4)L=5,5′-(丁基-1,4-二氧间苯二甲酸;bpyBr=4,4′-二溴-2,2′-联吡啶).单晶结构分析表明1为单核配合物,2为一维链状配合物。两个化合物均含有未配位的羧酸基团,表现为酸性配合物。交流阻抗谱研究表明,化合物1和2可以使Nafion复合膜的质子电导率分别提高约3115%和10.73%.未配位的羧酸基团所提供的高密度质子可能是这两种化合物具有良好的导电性的主要原因。结构分析、吸水性试验以及红外光谱测试说明化合物1具有较高的电导率是因为其表现出更好的亲水性和更强的酸性。Two Co(Ⅱ)coordination polymers(CPs)[Co(H_(2)L)(bpyBr)_(2)]・2H_(2)O(1)and[Co_(2)(H_(2)L)_(2)(bpyBr)_(2)(H_(2)O)_(3)]_(n)(2)(H_(4)L=5,5′-(butane-1,4-diylbis(oxy))diisophthalic acid;bpyBr=4,4’-dibromo-2,2’-bipyridyl)have been obtained through hydrothermal technique.X-ray single crystal diffraction analyses revealed that compound 1 was mononuclear,compound 2 adopted 1-D coordination chain structure.There were un-coordination protonated carboxylic groups in both of compounds,which endowed two Co(Ⅱ)-CPs acidity.AC impedance spectra studies revealed that Compounds 1 and 2 can enhance the proton conductivity of the composite membrane to about 33.16%and 10.44%higher than that of pure Nafion.High proton density offered by the uncoordinated protonated carboxylate groups may endow the two compounds with good conductivities.In addition,the better hydrophilicity and stronger acidity of compound 1 deduced from the structure analyses and verified by the water uptake tests and IR spectra may lead to its higher conductivity.

关 键 词：酸性Co(Ⅱ)-有机骨架 多羧酸配体 质子传导 交流阻抗谱。 

分 类 号：O611[理学—无机化学]