Crystal structures, fluorescent and magnetic properties of five new coordination polymers based on biphenyl-3,4′,5-tricarboxylic acid

Five new coordination polymers, {[cd(3)(bpt)(2)(DMF)(2)] center dot (H2O)(2)}(n) (1), [Cd(Hbpt)(biPY)(0.5)(H2O)](n) (2), [Cd-2(bpt)(phen)(2)Cl](n) (3), [Cu-2(bpt)(phen)(mu(2)-OH)(H2O)](n) center dot (H2O)(2)](n) (4) and ([Mn-5(Hbpt)(4)(phen)(4)(mu 2-OH)(2)(H2O)(2)] center dot (H2O)(2)(CH3CN)(2)](n) (5) have been prepared through hydro(solvo)thermal reactions of H(3)bpt (H(3)bpt=bipheny1-3,4',5-tricarboxylic acid) with different pyridyl-containing auxiliary ligands (bipy=4,4'-bipyridine and phen=1,10-phenanthroline). Compound 1 represents a 3D ladder-like framework composed of rod-shaped infinite chains. In 2, the bridging ligand bipy links binuclear cadmium ions to generate a 2D layer. Compound 3 features a 1D ladder structure and further linked by sr-it stacking interaction to form a 3D supramolecular network. Compound 4 exhibits a binodal 3-connected net which features the Schlafli symbol of (4.8(2)). Compound 5 contains trimetallic cluster and binuclear unite which are further linked by Hbpt ligand to form a 2D layer. Moreover, photoluminescent properties of compounds 1-3 were studied in the solid state. Magnetic susceptibility measurements indicate that compound 4 exhibits ferromagnetic exchange interactions, whereas compound 5 displays antiferromagnetic exchange interactions. (C) 2012 Elsevier Inc. All rights reserved.