一个二维超分子化合物［ Co（bbbm）（dnba）2］的合成、结构及性质

摘要

A new circular bimetallic Co(II) complex [Co(bbbm)(dnba)2 ][bbbm =1,1-(1,4-butanediyl) bis-1 H-benzimidazole, Hdnba=3,5-dinitrobenzoic acid)] has been hydrothermally synthesized from bbbm and dnba mixed ligands, and structurally characterized by elementary analysis, IR and single crystal X-ray diffraction a-nalysis.C32H24CoN8O12, triclinic, P1,a=10.859(5)Å,b=12.325(5)Å,c=13.119(5)Å,α=100.638(5)°,β=1 08.858(5)°,γ=92.309(5)°,Z=2,V=1623.5(12)Å3 ,Mr =771.52,Dc =1.578 g/cm3 ,F(000)=790,μ=0.609 mm-1 ,S=1.062,R=0.0423, wR =0.0967.Each CoI cation is four-coordinated by two N atoms from two bbbm ligands and two monodentate O atoms from different dnba anions.Two CoI cations are linked by two bbbm lig-ands to form a circular complex, which is further connected byπ-πstacking interactions to generate a one-dimen-sional supramolecular chain.Finally, the chains are bridged by C-H…πinteractions to form a two-dimensional su-pramolecular network.Moreover, the electrochemical and photoluminescent properties of the title compound were in-vestigated.CCDC:1025167.%以1，4－二苯并咪唑基－丁烷（bbbm）和3，5－二硝基苯甲酸（Hdnba）为混合配体，利用水热合成方法获得了一个环状双金属Co（ II）配合物：[ Co（ bbbm）（ dnba）2]，并通过元素分析、IR和单晶X－射线衍射确定了其结构．该配合物分子式为C32 H24 CoN8 O12，三斜晶系，P1空间群，a＝10．859（5）Å，b＝12．325（5）Å， c＝13．119（5）Å，α＝100．638（5）°，β＝108．858（5）°，γ＝92．309（5）°，Z＝2，V＝1623．5（12）Å3，Mr＝771．52， Dc ＝1．578 g／cm3，F（000）＝790，μ＝0．609 mm－1，S＝1．062，R＝0．0423，wR＝0．0967．晶体结构分析表明，配合物中的CoII与来自两个bbbm配体的两个N原子、两个dnba阴离子的单齿羧基O原子配位形成四面体配位构型．相邻的两个CoII通过两个bbbm配体连接成环状结构，相邻的双金属Co（II）配合物通过π－π堆积作用拓展成一维超分子链，该超分子链进一步通过C－H…π作用拓展成二维超分子网络．另外，还研究了该化合物的电化学和荧光性质．CCDC：1025167．