Two new mixed-ligand Zn(II) coordination polymers, namely, [Zn(bime)(glu)·4H2O] n (1) and [Zn(bime)(sub)·3H2O] n (2) (bime = 1,2-bis(imidazol-1′-yl)ethane, H2glu = glutaric acid, H2sub = suberic acid), have been synthesized and structurally characterized. Complex 1 exhibits a wavy two-dimensional (2D) sheet with (4,4) topology. Complex 2 is a three-dimensional (3D) framework with 5-fold interpenetrated diamond topology. Of particular interest, a discrete octamer water cluster comprised of a chairlike hexamer water cluster with two extra water molecules dangling on two diagonally vertices of the chair was observed in the grid of the 2D sheet of 1. In 2, a 1D infinite T5(2) water tape constructed from edge-sharing pentamer water clusters accommodates in the channels of the 3D network. The results suggest that the dicarboxylates play crucial roles in the formation of the different host structures as well as different guest water aggregations. Additionally, the thermal stabilities and photoluminescence spectra of them were discussed.

The ultrasonic reactions of Ag(2)O with benzoguanamine and ancillary carboxylate ligands under the ammoniacal condition gave eight new coordination compounds (CCs), namely, [Ag(4)(bga)(6)(mal)(2)] (1), [Ag(4)(bga)(6)(mlc)(2)] (2), [Ag(bga)(2)(tpa)(0.5)](n) (3), {[Ag(bga)(suc)(0.5)]center dot C(2)H(5)OH}(n) (4), {[Ag(bga)(Pta)(0.5)]center dot CH(3)OH}(n) (5), {[Ag(bga)(ox)(0.5)]center dot C(2)H(5)OH center dot H(2)O}(n) (6), {[Ag(2)(bga)(2)(dnb)(2)]center dot DMF}(n) (7), and [Ag(2)(bga)(2)(pma)(0.5)(H(2)O)](n) (8) (bga = benzoguanamine, H(2)mal = malonic acid, H(2)mlc = maleic acid, H(2)tpa = terephthalic acid, H(2)suc = succinic acid, H(2)pta = phthalic acid, H(2)ox = oxalic acid, Hdnb = 3,5-dinitrobenzoic acid, H(4)pma = pyromellitic acid, and DMF = N,N'-dimethylformamide). All CCs have been characterized by elemental analyses, IR spectra, and single-crystal X-ray diffraction. Compounds 1 and 2 are OD discrete molecules and contain centrosymmetric [Ag(2)(mal)](2) and [Ag(2)(mlc)](2) units, respectively, which are extended to ID supramolecular chains through intermolecule N-H center dot center dot center dot N complementary hydrogen bonds. Compounds 3 and 4 contain similar ID [Ag(2)(tpa)](n) and [Ag(2)(suc)](n) infinite chains incorporating monodentate bga ligand as an ornament. It is noteworthy that the Ag center dot center dot center dot Ag interaction was exclusively observed in the ID chain of compound 4, which may be caused by different coordination environments of the Ag(I) center between 3 and 4. The Ag center dot center dot center dot pi interactions further extend the ID chains into 2D sheet in 4. In 5 and 6, the mu(2)-bga ligands link Ag(I) ions to form ID helical chains, which are further extended by mu(2)-dicarboxylate to 2D 6(3)-hcb net incorporating different dimensions of hexagonal grids. Compound 7 is a ID chain containing [Ag(2)(dnb)(2)] subunits, to which the monodentate and bidentate bga ligands as well as DMF coordinate. Compound 8 is a 2D sheet structure incorporating mu(6)-eta(1):eta(1):eta(1):eta(1):eta(1):eta(0):eta(1):eta(0) pma, monodentate and bidentate bga ligands. The results show that the structural diversity (0D-2D) of the CCs is mainly attributed to the usage of diverse ancillary carboxylate ligands as well as diverse coordination modes of bga ligand. Moreover, the photoluminescence properties of the CCs 1-6 were also investigated in the solid state at room temperature.National Natural Science Foundation of China[21021061, 21071118]; MSTC[2007CB815301

Four novel 3d-4d heterometallic coordination complexes were synthesized based on a nonanuclear Ag(I) metallatecton by a threestep synthetic method. The photoluminescence behaviors of 2-4 are also discussed.

A novel anionic heptadecanuclear silver(I) cluster, (NH(4))(17)[(μ(6)-S)@Ag(17)(mba)(16)]·22H(2)O (1; H(2)mba = 2-mercaptobenzoic acid), was obtained by the reaction of equivalent molar silver oxide and 2,2'-dithiodibenzoic acid (H(2)dtba) under ultrasonic conditions at 50 °C. Complex 1 is a discrete cluster comprised of unexpected mba ligands on the shell and a μ(6)-S(2-) ion in the core, suggesting the occurrence of in situ S-S and S-C(sp(2)) bond cleavages of the H(2)dtba ligand. This novel cluster displays moderate orange-red emission in the solid state at room temperature.

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