刚性配体1,3,5-三(1-咪唑基)苯与1,2,4-苯三甲酸构筑的金属配合物：水热合成及晶体结构(英文)

Hydrothermal Syntheses and Crystal Structures of Two Metal Complexes with Mixed 1,2,4-Benzenetricarboxylic Acid and 1,3,5-Tris(1-imidazolyl)benzene Ligands

由水热法合成了2个配合物[Co(1,2,4-HBTC)(tib)](1)和[Ni4(1,2,4-BTC)2(tib)4(H2O)2]·(1,2,4-HBTC).9H2O(2)(1,2,4-H3BTC=1,2,4-苯三甲酸,tib=1,3,5-三(1-咪唑基)苯),并用元素分析、红外光谱、X-射线单晶衍射及热重分析等对其进行了表征。晶体结构分析结果表明:配合物1是由Co(Ⅱ)和tib连接形成的二维层状结构,1,2,4-HBTC2-作为端基配体与Co(Ⅱ)配位,而配合物2是通过1,2,4-BTC3-连接[Ni(tib)]2+二维网形成最终的二维多层结构,这2个化合物最终均被氢键连接形成三维超分子结构。

Two new coordination complexes [Co（1,2,4-HBTC）（tib）]（1） and [Ni4（1,2,4-BTC）2（tib）4（H2O）2]·（1,2,4-HBTC）·9H2O（2）（1,2,4-H3BTC=1,2,4-benzenetricarboxylic acid,tib=1,3,5-tris（1-imidazolyl）benzene） were obtained by hydrothermal reactions of 1,2,4-H3BTC and tib with corresponding metal salts.Single crystal X-ray diffraction analysis revealed that each tib ligands connect three metal atoms to form two-dimensional（2D） networks in 1 and 2.On the other hand,each 1,2,4-HBTC2-coordinates to one Co（Ⅱ）atom as a terminal ligand in 1,while in 2,two 1,2,4-BTC3-ligands link four Ni（Ⅱ）atoms which further connect [Ni（tib）]2＋ 2D networks to result in formation of multi-layered 2D structure.Complexes 1 and 2 are finally extended to three-dimensional（3D） supramolecular structures by hydrogen bonding interactions.