两个三维柱层式Ce混合羧酸多孔金属-有机骨架配合物的合成、结构与磁性

采用水热法合成了两个新的混合羧酸铈多孔金属-有机骨架配合物Ce2(fum)3 (H2O)4?(bdc)?(H2O)2]n（1）和Ce2(suc)2(ox)(H2O)4?(H2O)4]n（2），利用元素分析、红外光谱、热重分析和单晶X射线衍射对其组成和结构进行了表征，并通过磁性测量研究了其磁学性能. 单晶X射线衍射结果表明，配合物1和2均为三维柱层式多孔金属-有机骨架结构. 配合物1由Ce离子和富马酸（fumarate, fum）形成层，层与层之间再通过富马酸作为柱状配体支撑形成三维结构，并在层间的两个方向上形成相互交错的通道，未配位的中性对苯二甲酸分子（p-benzenedicarboxylate, bdc）和晶格水分子填充于孔道中. 与配合物1类似，配合物2由Ce离子和丁二酸（succinate, suc）形成层，层间通过草酸（oxalate, ox）作为柱状配体支撑形成三维结构，在层间的三个方向上具有相互交错的通道，晶格水分子填充于孔道中.

Synthesis,Structures and Magnetism of Two New 3D Pillared-layer Cerium Mixed Carboxylate Porous Metal-organic Frameworks

Two new cerium mixed carboxylate porous metal-organic frameworks, Ce2(fum)3(H2O)4?(bdc)?(H2O)2]n (1) and Ce2(suc)2(ox)(H2O)4?(H2O)4]n (2) were synthe- sized by hydrothermal method with two kinds of carboxylic acid, respectively. They were characterized by elemental analysis, IR, TGA-DTA and single-crystal X-ray diffraction. Single-crystal X-ray diffraction indicates that complexes 1 and 2 are both 3D porous metal-organic frameworks with pillared layers. Complex 1 possesses a 3D framework structure consisting of Ce-fumarate layers pillared by fumarate ligands with intersected channels in two directions between the layers occupied by uncoordinated neutral p-benzenedicarboxylic acid and lattice water molecules. Similar to complex 1, complex 2 is a 3D structure with Ce-succinate layers pillared by oxalate ligands, which shows intersected channels in three directions between the layers filled with lattice water molecules.