Keggin POM-based 3D framework tuned by silver polymeric motifs: structural influences of tetrazolate functional groups
作者:Xiang Wang、Jun Peng、Kundawlet Alimaje、Zhen-Yu Shi
DOI:10.1039/c2ce26193f
日期:——
By altering the functional groups of tetrazolate ligands in the same Ag–POM reaction system, two novel inorganic–organic hybrids: [Ag7(L1)4(H2O)(PMo12O40)] (1) and [Ag5(L2)2(PMo12O40)]·H2O (2) (HL1 = 5-(4-imidazol-1-yl-phenyl)-2H-tetrazole, HL2 = 5-(4-triazol-1-ylmethyl-phenyl)-2H-tetrazole), have been synthesized under hydrothermal conditions, which are characterized by single crystal X-ray diffraction, IR spectra and elemental analyses. Compounds 1 and 2 both display POM-based 3D frameworks modified by different Ag–tetrazolate motifs. In compound 1, a beautiful POM-inserted 2D network is formed by Ag6(L1)4}n chains and POM polyoxoanions, which are linked to each other through covalent bonds into a (6,6,10)-connected 3D framework. The 3D framework of compound 2 is constructed from chains of circle-connecting-circle and dimeric polyoxoanions. The different structural features of the two compounds suggest that the functional groups of tetrazolate ligands should play a key role in the process of assembly. The luminescent properties for compounds 1 and 2 are investigated.
通过改变同一 Ag-POM 反应体系中四唑配体的官能团,两种新型无机-有机杂化物:[Ag7(L1)4(H2O)(PMo12O40)] (1) 和 [Ag5(L2)2(PMo12O40) ]·H2O (2) (HL1 = 5-(4-咪唑-1-基-苯基)-2H-四唑,HL2 = 5-(4-三唑-1-基甲基-苯基)-2H-四唑),已水热条件下合成,通过单晶X射线衍射、红外光谱和元素分析对其进行了表征。化合物 1 和 2 均显示出基于 POM 的 3D 框架,并经过不同的 Ag-四唑酯基序修饰。在化合物1中,Ag6(L1)4}n链和POM多氧阴离子形成了美丽的POM插入2D网络,它们通过共价键相互连接成(6,6,10)连接的3D框架。化合物 2 的 3D 框架由环连接环链和二聚多氧阴离子构成。两种化合物的不同结构特征表明四唑酯配体的官能团在组装过程中应发挥关键作用。研究了化合物 1 和 2 的发光特性。