草酸钕[Nd(H2O)(C2O4)2](C6N2H16)0.5⋅2H2O的合成、结构及质子传导性质

Synthesis, Structure and Proton Conductivity Study of Neodymium Oxalate [Nd(H2O)(C2O4)2](C6N2H16)0.5⋅2H2O

李冰 赵姗姗 黄亮亮

Bing Li Shanshan Zhao Liangliang Huang

辽宁石油化工大学 石油化工学院，辽宁 抚顺 113001

School of Petrochemical Engineering，Liaoning Petrochemical University，Fushun Liaoning 113001，China

以N,N'?二甲基哌嗪为结构导向剂，在水热条件下合成了一个具有三维开放骨架结构的草酸钕[Nd(H2O)(C2O4)2](C6N2H16)0.5?2H2O（化合物1）。单晶X?射线衍射测试结果表明，化合物1的结构由单帽四方反棱柱体NdO9和草酸单元相互连接构成；其结构中含有三维贯穿的12?元环孔道，其中水分子和质子化的Me2ppz阳离子分别位于沿着b轴和a轴的孔道中。客体水分子的存在为质子导电性能提供了结构基础。水热及酸碱稳定性测试结果表明，化合物1的结构具有优异的稳定性。交流阻抗测试结果表明，化合物1具有高的质子传导率，在温度为348 K、相对湿度（RH）为98%的条件下，其质子传导率为2.81×10-4 S/cm。

Using N,N'?Dimethylpiperazine as structure directing agent, a 3D open?framework neodymium oxalate [Nd(H2O)(C2O4)2](C6N2H16)0.5?2H2O (compound 1) was synthesized under hydrothermal condition. The single crystal X?ray diffraction reveals that the structure is composed of alternating single?capped tetragonal antiprism NdO9 and oxalic acid units connected to each other. The structure contains three?dimensional 12?membered ring channels, in which water molecules and protonated Me2ppz cations are located in the channels along the b and a axes, respectively. The presence of guest water molecules provides the structural basis for proton conductivity. The results of hydrothermal and acid?base stability tests show that the structure of compound 1 had excellent stability. AC impedance tests show that compound 1 has a high proton conductivity, which is 2.81×10-4 S/cm at 348 K and 98% RH.

国家自然科学基金重大研究计划项目(91961110)

10.12422/j.issn.1672-6952.2023.04.009