混合配体构筑的Co(Ⅱ)二维配位聚合物晶体结构及其性质

Crystal Structure and Properties of Co(Ⅱ)Coordination Polymer Constructed by Mixed Ligands

以1,3-二(咪唑)丙烷(1,3-BIP)、4,4'-(1H-1,2,4-三唑-3,5-二基)二苯甲酸(H_(2)BCT)和Co(NO_(3))_(2)·3H_(2)O为原料,在溶剂热的条件下构筑了一例Co配位聚合物:{[Co_(2)(H_(2)O)_(2)(1,3-BIP)(BCT)_(2)]_(n)·DMF·H_(2)O}(SNUT-3),利用X射线单晶衍射、元素分析(EA)、红外光谱(FT-IR)、粉末X射线衍射(PXRD)和热重分析(TGA)对配位聚合物SNUT-3进行表征,结果表明SNUT-3属于三斜晶系,P-1空间群,有机配体以独特的连接方式构成了(4,4)拓扑结构,并通过分子间氢键形成3D超分子结构。此外,粉末X射线衍射结果表明SNUT-3具有较高的相纯度和良好的重复性,热重分析结果表明SNUT-3的空间结构可以在25~380℃稳定存在。

Coordination polymer{[Co_(2)(H_(2)O)_(2)(1,3-BIP)(BCT)_(2)]n·DMF·H_(2)O}(SNUT-3)was constructed from 1,3-dimidazolypropane(1,3-BIP),4,4'-(1H-1,2,4-triazole-3,5-diyl)dibenzoic acid(H_(2)BCT)and Co(NO_(3))_(2)·3H_(2)O under solvothermal conditions,its structure was determined by EA,FT-IR,TGA,PXRD and X-ray single crystal diffraction analysis.The results showed that SNUT-3 crystallized in trigonal system with space group P-1,the ligand constituted in a unique way to form a(4,4)topology and 3D supramolecular structure through intermolecular hydrogen bonds.In addition,PXRD result showed that SNUT-3 had high phase purity and good repeatability,TGA result showed that the spatial structure was stable at 25~380℃.