在相同的水热条件下,铜盐、钴盐分别和配体H2PPCA(H2PPCA=5-pyrazin-2-yl-1H-pyrazole-3-carboxylic acid)发生反应,生成了2个结构截然不同的金属有机配合物,分别是[Cu(PPCA)(H2O)]·H2O(HPU-7)和{[Co(PPCA)(H2O)]·H2O}n(HPU-8).HPU-7是由CuCl2·2H2O与配体在160℃下反应而成的,它呈现出零维的双核铜单元结构.HPU-8是由Co(NO3)2·6H2O与配体在160℃下反应生成的,它呈现出由双核钴单元与配体的骨架相连而成的4,4-连接的二维层结构.中心金属离子的改变导致了不同结构MOF的形成,并且它们的电化学性能研究表明它们是很好的半导体材料,它们都对亚甲基蓝(MB)具有较好的光催化效果.%By Reactions of Cu(Ⅱ),Co(Ⅱ)with H2PPCA ligand (H2PPCA=5-pyrazin-2-yl-1H-pyrazole-3-carboxylic acid) in the same hydrothermal conditions resulted in two distinct structural metal-organic frameworks (MOFs),namely,[Cu (PPCA)(H2O)]·H2O (HPU-7) and {[Co(PPCA)(H2O)] ·H2O}n (HPU-8).HPU-7 that obtained from CuCl2·2H2O at 160 ℃ is a dinuclear cluster based on Cu(Ⅱ) ions and PPCA2-ligands.HPU-8 synthesized by Co(NO3)2·6H2O at 160 ℃ exhibits a 4,4-connected 2D layer connected by dinuclear Co(Ⅱ) clusters and the skeletons of the PPCA2-ligands.The structural differences are dependent on the coordination geometries of central metal ions.And due to the structural differences,the two complexes display different photodegradation efficiencies toward methylene blue (MB).CCDC:1575337,HPU-7;1575338,HPU-8.
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