A new one-dimensional CuII complex with a three-dimensional supramolecular architecture incorporating benzene-1,3-dicarboxylate and 1-[(1H-benzotriazol-1-yl)methyl]-1H-imidazole

Subtle modifications of N-donor ligands can result in complexes with very different compositions and architectures. In the complex catena-poly[[bis{1[( 1H-benzotriazol-1-yl) methyl]-1H-imidazole-kappa N-3} copper(II)]-mu-benzene-1,3-dicarboxylato- kappa O-3(1),O-1':O-3], {[Cu(C8H4O4)(C10H9N5)(2)(H2O)]center dot 2H(2)O}(n), each CuII ion is six-coordinated by two N atoms from two crystallographically independent 1-[(1H-benzotriazol-1-yl) methyl]-1H-imidazole (bmi) ligands, by three O atoms from two symmetry-related benzene-1,3-dicarboxylate (bdic(2-)) ligands and by one water molecule, leading to a distorted CuN2O4 octahedral coordination environment. The Cu-II ions are connected by bridging bdic(2-) anions to generate a one-dimensional chain. The bmi ligands coordinate to the Cu-II ions in monodentate modes and are pendant on opposite sides of the main chain. In the crystal, the chains are linked by O-H center dot center dot center dot O and O-H center dot center dot center dot N hydrogen bonds, as well as by pi-pi interactions, into a three-dimensional network. A thermogravimetric analysis was carried out and the fluorescence behaviour of the complex was also investigated.