草酸镨配合物的合成、结构及其质子传导性能

摘要

In order to explore the water molecules for proton conduction performance of coordination polymers,a new lanthanide coordination polymer Pr2 (ox)3 (H2 O)6 ·4H2 O was synthesized using Pr3 + and oxalate ligand. The complex of Pr2 (ox)3 (H2 O)6 ·4H2 O was characterized by elemental analyses,IR,TG,power X-ray dif-fraction (PXRD)and X-ray single crystal diffraction.The oxalate ligands bridging Pr3 + leads to the formation of a 2D layered structure of six-membered rings,and further into the overall 3D framework structure by hydrogen-bonding interaction with crystallization water molecules and coordination water molecules.Temperature-depend-ent but humidity-independent proton conduction was observed with a maximum of 4.88 ×10 -4 S /cm at 80 ℃. The result confirms that the hydrogen-bonding pathway in the structure of coordination polymer is a prerequisite for realization of proton transfer in water system,and the coordination water molecules of lanthanide ions may be a good proton conductor.%为研究水分子在配合物的质子传导性能方面的作用，用稀土 Pr3＋与草酸反应得到一个新颖的配合物 Pr2（ox）3（H2 O）6·4H2 O，对其进行了元素分析、红外光谱、热重、粉末 X 射线衍射以及单晶 X 射线衍射等分析测试。结构研究表明，该配合物由 Pr3＋与草酸根配体连接成六元环，并进一步形成二维层状结构，层与层之间通过结晶水分子与配位水分子的氢键作用进一步堆积成三维框架结构。在80℃无外加湿度条件下配合物的质子传导率达到最大值4.88×10－4 S ／cm，结合其结构特点，证实配合物中的氢键通路是水体系中实现质子传递的先决条件，同时也说明了稀土离子上的配位水分子是一类好的质子给体。