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

Two new one-dimensional heterobimetallic coordination polymers, {[Ni(2-pytpy)2][Ag2(SCN)4]}n (2-pytpy = 4′-(4-pyridyl)-2,2′:6′,2′′-terpyridine) and {[Ni(2-pytpy)2][Ag2(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 ([Ag2(SCN)4] for 1, [Ag2(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.