Two Ag(I)-Ni(II) Heterobimetallic Coordination Polymers Based on Metalloligand and Bridging Ligands: Syntheses, Structures and Luminescence Properties

摘要

Two new one-dimensional heterobimetallic coordination polymers, {[Ni(2-pytpy)(2)][Ag-2(SCN)(4)]}(n) (2-pytpy = 4'-(4-pyridyl)-2,2':6',2''-terpyridine) and {[Ni(2-pytpy)(2)][Ag-2(N(CN)(2))(3)(NO3)DMSO]}(n) (DMSO = dimethyl sulfoxide), were synthesized from the reaction of metalloligand [Ni(2-pytpy)(2)](2+) and Ag+ with bridging ligands (SCN- for 1, N(CN) (2) (-) for 2). 1 and 2 were well characterized by elemental analysis, Fourier-transform infrared spectroscopy, thermal analysis and single-crystal X-ray diffraction. The single-crystal X-ray analysis reveals that both 1 and 2 possess one-dimensional (1D) chain structures, which are constructed from metalloligands [Ni(2-pytpy)(2)](2+) and dinuclear silver structural units ([Ag-2(SCN)(4)] for 1, [Ag-2(N(CN)(2))(3)(NO3)DMSO] for 2). These 1D chains are further constructed into 3D supramolecular structures through the intermolecular hydrogen bonds. The solid-state luminescence properties of 1 and 2 were also investigated.