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Abstract
Self-assemblies of the 2,4,6-tris(2-pyridyl)-1,3,5-triazine (tptz) and Cu(OH)2 in the presence of dicarboxylate ligands yielded four new complexes, [Cu4(bpca)4(L1)2(H2O)2]·5H2O (1), [Cu2(bpca)2(L2)(H2O)2]·2H2O (2), [Cu2(bpca)2(L3)(H2O)2]·H2O (3), and [Cu2(bpca)2(L4)(H2O)2]·3H2O (4) (bpca = bis(2-pyridylcarbonyl)amide anion, H2L1 = phthalic acid, H2L2 = succinic acid, H2L3 = maleic acid, H2L4 = acetylenedicarboxylic acid). Their structures were determined by single-crystal X-ray diffraction analyzes and further characterized by IR spectra and thermogravimetric analyzes. The five-coordinate Cu ions in 1 are bridged by phthalate to form 1-D chains, which are assembled into 3-D frameworks by extensive hydrogen bonds. Compounds 2–4 possess similar structures, built up of [Cu2(bpca)2(L)(H2O)2] (L = L2 for 2, L3 for 3, L4 for 4) and lattice molecules. The 3-D frameworks of 2–4 are completed by hydrogen bond interactions.