1D chain, 2D layer and trinuclear unit based 3D frameworks of indium(iii)-biphenyl carboxylate complexes

Four indium(III)-biphenyl carboxylate coordination complexes: [In(dpdc)(bipy)Cl](2) (1), {[In(Hdptc)(bipy)](2)center dot H2O}(n) (2), [In(dptc)center dot H3O](n) (3), [In-3(mu(2)-OH)(2)(Hdptc)(dptc)H2O](n) (4) (H(2)dpdc = diphenyl-2,2 '-dicarboxylic acid, bipy = 2,2'-bipyridine, H(4)dptc = biphenyl-2,2',6,6'-tetracarboxylic acid) have been synthesized under hydrothermal and solvothermal conditions. Complex 1 exhibits a dimeric molecule structure featuring a square motif organized by two In(III) ions and two dpdc ligands each at the corner; 2 contains a similar dimeric segment which is extended into a 1D ribbon structure by the Hdptc ligands and further assembled into 2D supramolecular layer through hydrogen bonding; 3 features a 2D (4,4) grid layer, which is assembled into 3D supramolecular network through hydrogen bonding with guest water molecules. Complex 4 consists of an unprecedented eight-connected trinuclear In-3(mu(2)-O)(2)(CO2)(8) building unit which is jointed by four-connected dptc ligand into a binodal (4,8)-connected scu topology. The results present a feasible way of manipulation to control the dimensionality of the complexes by adjusting ligands and reaction temperatures. The complexes are also characterized by X-ray powder diffractions (PXRD), infrared spectroscopy and elemental analysis. (C) 2012 Elsevier B.V. All rights reserved.