Four new silver phosphonates constructed from semi-rigid phosphonate ligands: synthesis, structure and properties
作者:Xiaomin Hou、Si-Fu Tang
DOI:10.1039/c6ra21382k
日期:——
Compound 1 features a pillar-layered structure with silver and oxygen atoms as the layer and the organic linkers as pillars. Compound 2 displays a layer structure which can assemble into a three-dimensional supramolecular structure with the aid of O–H⋯O interactions. In compound 3, silver ions are linked into layers and further connected to form a pillar-layered structure with the pyrazine molecules as pillars
四种新的膦酸银,即Ag 3(H 3 L 1)(1),Ag 2(H 2 L 2)(2),Ag 2(H 2 L 2)(pyz)(3)和Ag 2(H 4 L 2)(H 2 L 2)(4,4'-bipy)(H 2 O)(4)(H 6 L 1 =(苯-1,3,5-三基三(亚甲基))三(膦酸) ); H 4 L 2=(2,5-二甲基-1,4-亚苯基)双(膦酸); pyz =吡嗪; 通过水热法由氧化银(Ag 2 O)与具有或不存在第二辅助配体的三或双膦酸酯配体的反应合成了4,4'-联吡啶= 4,4'-联吡啶)。使用单晶和粉末X射线衍射,IR,EA,TGA和荧光技术系统地表征了这些膦酸银。膦酸酯配体采用多种配位方式,并通过O-Ag键和C-Ag键与银离子配位,从而在银离子周围形成各种配位构型。化合物1具有柱状层结构,其中银和氧原子作为层,有机连接基作为柱状。化合物图2显示了可以通过O–H⋯O相互作用组装成三