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Abstract: Two novel lanthanide complexes, [Nd2(L)6(bipy)(H2O)]n (1) and [Sm2(L)6(bipy)(H2O)]n (2) (HL=3,5-bis(trifluoromethyl)benzoic acid, bipy=2,2′-bipyridine), have been solvothermal synthesized and characterized by single-crystal X-ray diffraction, infrared spectroscopy, element analyses and powder X-ray diffraction. Single-crystal X-ray diffraction measurements reveal that the crystal structures are isostructural, crystallizing in the orthorhombic space group P-1 and they consist of linear tetrameric Ln4 units which are connected through carboxylate of L ligands into a one-dimensional (1D) zigzag chain and spread into 2D supramolecular (4,4) sql net. Furthermore, magnetic studies reveal antiferromagnetic behavior for complex 1. The luminescent properties of 2 were also studied. [Copyright &y& Elsevier]

Abstract: Two novel lanthanide complexes, [La3(L)8(phen)(OH)(H2O)]n (1) and [Dy(L)3(EtOH)]n (2) (HL=3,5-dichlorobenzoic acid, phen=phenanthroline), have been solvothermal synthesized and characterized by single-crystal X-ray diffraction, infrared spectroscopy, element analyses, powder X-ray diffraction and thermal gravimetric analyses. Complex 1 affords one-dimensional chains with hexanuclear La6 units which are peculiar in the coordination chemistry of La(III) and extended into a 3D supramolecular network via π–π stacking and hydrogen-bonding interactions. Whereas complex 2 gives 1D Dy chains, which are in turn bridged by double and quadruple carboxylate of L ligands and construct a 2D layer by weak hydrogen bonds. In addition, magnetic studies reveal antiferromagnetic behavior for complex 2. [Copyright &y& Elsevier]

Two new isostructural complexes, [Mn3(L)6(bipy)2] ( 1) and [Co3(L)6(bipy)2] ( 2) (L = 2,4-dichlorobenzoate, bipy = 2, 2′-bipyridine) were synthesized under the hydrothermal conditions and characterized by single-crystal X-ray diffraction, IR spectroscopy, EA (elemental analysis), and magnetic measurements. The two complexes are found to contain a trinuclear ( M3) unit that opens up a possibility of being magnetic materials. The magnetic measurements reveal that 1 exhibits the antiferromagnetic exchange interaction between metal ions and 2 presents a weak ferromagnetic interactions between the CoII ions. [ABSTRACT FROM AUTHOR]

Abstract: Two chiral complexes, [Cu(L1)(L2)H2O]·3H2O (1) and [Ni(L1)(SCN)(H2O)2]·2H2O (2) (HL1=L-histidine, HL2=L-alanine), have been synthesized through slow evaporation of solvent and characterized by single-crystal X-ray diffraction, IR, powder X-ray diffraction, element analysis and circular dichroism measurements. Complexes 1 and 2 crystallize in the monoclinic system with chiral space group P21, respectively. Interestingly, magnetic and ferroelectric studies reveal that complexes 1 and 2 demonstrate ferromagnetic and ferroelectric properties. [Copyright &y& Elsevier]

A mixed Co-Ag complex with 2,6-dicarboxypyridine (H2PDC), AgCo(PDC)2, was synthesized under hydrothermal conditions. The complex adopts a 2D layer structure formed by intramolecular π-stacking. Each Co(III) ion is chelated by two 2,6-dicarboxypyridine anions to give the [Co(PDC)2]- anion that is further extended by Ag+ to form 44 square grids. [ABSTRACT FROM AUTHOR]

Abstract: Benzimidazole-5-carboxylate (HL1) and 5-methylbenzimidazole-6-carboxylic acid (HL2) have been employed to assemble with Cd(II) ions under hydrothermal conditions, leading to the generation of 1D (1) and 2D (2) metal-organic frameworks. The two coordinated water molecules of cadmium in 1 restrain the carboxylic moiety from adopting a bidentate chelating coordination mode, which seems to be an important factor in the dramatic structural change from 1D to 2D. Both complexes display blue emission in the solid state and the luminescent properties relate to their structures. [Copyright &y& Elsevier]