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Six new coordination compounds, namely [Co(H2bptc)]n(1), [Mn(H2bptc)]n(2), [Cd2(bptc)(phen)2(H2O)2]n(3), [Eu2(cpa)3(DMF)2]n(4), [Nd2(cpa)3(DMF)2]n(5) and [Pr2(cpa)3(DMF)2]n(6) (bptc4−= biphenyl-2,2′,4,4′-tetracarboxylate anion, phen =1,10-phenanthroline, cpa2−= 4-chloroisophthalic acid anion) were synthesized under hydrothermal conditions. Their structures have been determined by single-crystal X-ray diffraction analysis and further characterized by elemental analysis, IR spectra, and thermogravimetric analysis. Co and Mn compounds are isostructural, and possess a three-dimensional 5, 5-connected network. In Cd compound, multicarboxylate ligand H4bptc link Cd centers to generate a two-dimensional 4, 4-cnet structure with phen acting as terminal ligand. Eu, Nd, and Pr compounds have similar structures, and cpa2−ligands link lanthanide cations to generate a two-dimensional sheet structure. Magnetic susceptibility measurements indicate that the Co compound has a dominating ferromagnetic coupling between Co(ii) ions, and Mn compound exhibits antiferromagnetic coupling between Mn(ii) ions. Furthermore, their luminescent properties are also determined in the solid state at room temperature. [ABSTRACT FROM AUTHOR]

Two new 3D frameworks [(WS4Cu6Br4)(timp)8/3(H2O)40/3]n(1) and [(WS4Cu6Br4) (timtz)8/3(H2O)40/3]n(2), containing heptanuclear cluster blocks (one W atom and six Cu atoms) bridged by trigonal ligands timp or timtz (timp = 1-(3,5-di (1H-imidazol-1-yl)phenyl)-1H-imidazole; timtz = 2,4,6-tri(1H-imidazol-1-yl)-1,3,5-triazine), were successfully synthesized. Both compounds were characterized by single-crystal X-ray diffraction, elemental analysis, XRD, IR, TGA. X-ray determination shows that 1and 2can be topologically represented as (3,4)-connected networks with α-C3N4(or ctn) topology where [WS4Cu6] act as the 4-connecting nodes, and the timp or timtz ligands bridge in pairs that act as the three-connecting nodes. Both compounds have the high symmetry of space group I-43d, which is the maximum symmetry for this net topology. The luminescent spectra and N2absorption behaviors for 1and 2have also been investigated. [ABSTRACT FROM AUTHOR]