The role of Ag···O and Ag···Ag interactions in silver(I) supramolecular frameworks constructed from benzene multicarboxylate and nitrogen ligands
作者:Shu Lin Xiao、Guang Yue Li、Li Qin、Guang Hua Cui
DOI:10.1007/s11243-013-9749-x
日期:2013.10
Using a hydrothermal synthesis method, two Ag(I) coordination polymers, [Ag2(bbbm)2]·(Hbtc)} n (1) and [Ag2(mbim)2(Hsip)]·H2O} n (2) (bbbm = N,N’-(1,4-butanediyl)bis-(benzimidazole), mbim = N,N′-(1,1-methyl)-bis-(imidazole), H3btc = 1,3,5-benzenetricarboxylic acid, H3sip = 5-sulfoisophthalic acid) were synthesized and characterized by physicochemical and spectroscopic methods and single crystal diffraction. The complex 1 features a 2D supramolecular network formed by left- and right-handed cationic [Ag(bbbm)] n helical chains and Hbtc ligands with the link of Ag···O interactions, displaying an unusual trinodal (3,3,4)-connected 3,3,4L12 topology net. The complex 2 has a left-handed and a symmetric right-handed double-stranded [Ag2(mbim)2(Hsip)] n helical chains. The adjacent [Ag2(mbim)2(Hsip)] n helical chains are further linked by Hsip ligands through the combination of weak Ag···O coordinative interactions and ligand-supported Ag···Ag interactions to generate a 3D supramolecular framework, exhibiting a new type of topology of a trinodal (4,5,5)-connected net. The solid-state fluorescence properties of the compounds 1 and 2 were investigated.
采用水热合成方法,制备了两种Ag(I)配位聚合物,[Ag2(bbbm)2]·(Hbtc)} n (1)和[Ag2(mbim)2(Hsip)]·H2O} n (2) (bbbm = N,N'-(1,4-丁二基)双-(苯并咪唑),mbim = N,N'-(1,1-甲基)-双-(咪唑),H3btc = 1,3,5-苯三甲酸,H3sip = 5-磺基间苯二甲酸)的合成和表征通过物理化学和光谱方法以及单晶衍射。配合物1具有由左手和右手阳离子[Ag(bbbm)] n 螺旋链和Hbtc配体形成的二维超分子网络,并以Ag…O相互作用为纽带,表现出不寻常的三节结构(3,3,4 )-连接3,3,4L12拓扑网络。配合物2具有左手和对称右手双链[Ag2(mbim)2(Hsip)]n螺旋链。相邻的[Ag2(mbim)2(Hsip)] n 螺旋链进一步被Hsip配体通过弱Ag·O配位相互作用和配体支持的Ag·Ag相互作用的组合连接起来,生成3D超分子框架,展示了一种新型的三节(4,5,5)连接网络的拓扑结构。研究了化合物1和2的固态荧光性质。