文摘
The solvent-coordinated metal cations as templates affecting the architectures of anionic heterothiometallic Mo(W)/S/Ag polymeric clusters was investigated. Four W/S/Ag polymeric clusters {[Tb(DMSO)8][W3S12Ag3]}n (1, DMSO = dimethyl sulfoxide), {[Tb(DMF)8][W3S12Ag3]}n (2, DMF = N,N′-dimethylformamide), {[Tb(NMP)8][W4S16Ag5]}n (3, NMP = N-methyl-2-pyrrolidone) and {[Mg(NMP)6][W2S8Ag2]·2NMP}n (4) with distinct 1-D anionic structures were obtained by the reactions of (NH4)2WS4, AgI and M(NO3)x (M = Tb, x = 3; M = Mg, x = 2) in corresponding solvents (DMSO, DMF or NMP). 1–4 were determined by elemental analysis, IR, UV–Vis, thermogravimetric analysis, X-ray powder and single crystal diffractions. Directed by different solvent-coordinated trivalent terbium metal cations, 1 shows a 1-D anionic helical chain architecture; 2 exhibits a 1-D anionic zigzag chain with hexanuclear [W3S12Ag3]3− repeated units; 3 possesses another kind of 1-D anionic zigzag chain with the unique nonanuclear planar square-like [W4S16Ag5]3− repeated units. While induced by NMP-coordinated bivalent magnesium metal cation, 4 exhibits a 1-D anionic linear chain structure.
