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选择1,2,3,4-丁烷四羧酸作为柔性配体,与氯化镧进行反应,成功合成了一种新型的含有一维孔洞的有机-金属配位聚合物{[LaNa(BTCA)(H2O)3].4H2O}n(1),并通过X-ray单晶衍射仪测定晶体结构.这种配位聚合物的结构中含有三种不同大小的孔洞,但是只有最小的孔洞才可以吸附金属钠离子,另外两种大小的孔洞只能容纳自由水分子.这种特殊的结构性说明了用柔性羧酸作为配体合成金属-有机微孔结构所能形成的独特的结构特性.
1,2,3-Butanetetracarboxylic acid was chosen as the flexible ligand and reacted with lanthanum chloride to synthesize a new type of organic-metal coordination polymer {1 [LaNa (BTCA ) (H2O) 3] .4H2O} n (1) and the crystal structure was determined by X-ray single crystal diffractometry.The structure of this coordination polymer contains three different size pores, but only the smallest one Can adsorb metal sodium ions, and the other two sizes of holes can only accommodate free water molecules.This special structure illustrates the unique structural features that can be formed by the synthesis of metal-organic microporous structures with flexible carboxylic acids as ligands.