Topologies and solid electric conductivities of two diverse silver 4-sulfobenzoate coordination polymers controlled by uncoordination and coordination 4-aminopyridine ligands

Abstract

Two new diverse silver 4-sulfobenzoate coordination polymers, {[Ag(4-sb)]·(4-apyH)}n (1) and [Ag2(4-apy)(4-sb)]n (2) where 4-sb is 4-sulfobenzoate dianion and 4-apy is 4-aminopyridine, were prepared by the strategy of different ratio of starting materials and characterized by single-crystal X-ray analysis, elemental analysis, IR spectra, TG analysis, fluorescence spectra and electric conductivity. The molecular structure of 1 is made up of alternating 2-D anionic {[Ag(4-sb)]−}n layers and 4-apyH cations. Complex 2 is a 3-D structure. Both of the molecular structures are pillared architectures. To assess the relationship between structures and properties, the detail topologies of two diverse coordination polymers were analyzed. Complex 1 possesses a 3,6,6-c 3-nodal net with kgd topological layers, while 2 shows a new 4,4,8-c network. The room-temperature solid conductivity of 1 is lower than that of 2, which is controlled by the weak interactions.