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A U(VI) mononuclear coordination complex [UO2(a4-ptz)2·(H2O)3] (1) and a Zn(II) 1-D coordination polymer [Zn(a4-ptz)2·(H2O)2]·2H2O (2) have been synthesized with 5-[N-acetato(4-pyridyl)]tetrazolate (a4-ptz) as ligand. Complex 1 has a slightly distorted pentagonal bipyramid around each U center. Complex 2 is octahedral with four a4-ptz and two water ligands. Each Zn center is linked by carboxylate-O(1) and tetrazolate-N(2) of a4-ptz forming a 1-D polymeric chain. Complexes 1 and 2 are self-assembled to form 3-D supramolecular structures through hydrogen bonds. The luminescence properties of 1 and 2 were investigated at room temperature in the solid state. The results suggest that 1 and 2 may be useful as photoactive materials. [ABSTRACT FROM AUTHOR]

Abstract: Reactions of MCl2 (M=Mg, Ca, Sr, Ba) and a4-ptz (a4-ptz=5-[N-acetato (4-pyridyl)] tetrazolate) potassium salt in water, respectively, and produced four new complexes [Mg(H2O)6]·(a4-ptz)2 ·2H2O (1), [Ca(a4-ptz)2(H2O)2] n ·2nH2O (2), [Sr(a4-ptz)2(H2O)2] n ·2nH2O (3), [Ba4(a4-ptz)8(H2O)8] n ·4nH2O (4). These compounds were structurally characterized by elemental analysis, IR spectroscopy and single-crystal X-ray diffraction. Compound 1 has mononuclear structure bearing distinct intermolecular hydrogen-bond interactions to form a three-dimensional supramolecular network. While compounds 2–4 have one-dimensional polymeric chains that are bridged by two water molecules linker, respectively. The luminescence properties of 1–4 were investigated at room temperature in the solid state. [Copyright &y& Elsevier]

Abstract: Three novel complexes [Mn(atza)2(H2O)4] (1), [Mn(nptza)2(CH3OH)4] (2), and [Mn(a4-ptz)2(H2O)2] n ·2nH2O] (3) [atza=5-aminotetrazole-1-acetato, nptza=5-[(4-nitryl)phenyl] tetrazole-1-acetato, a4-ptz=5-[N-acetato(4-pyridyl)] tetrazole] containing carboxylate–tetrazolate ligands have been synthesized and characterized by element analysis. X-ray crystallography shows that complexes 1 and 2 both contain mononuclear structure. The complex 3 is a 1D polymeric chain structure. Compounds 1–3 are self-assembled to form supramolecular structures through hydrogen bonds interactions. [Copyright &y& Elsevier]

Abstract: Two copper(II) coordination polymers [Cu(atza)2]n ·2nH2O (1) and [Cu(atza)2(4,4′-bipy)0.5 ·H2O]n (2) [atza=5-aminotetrazole-1-acetato] have been synthesized and characterized by X-ray diffraction analysis, element analysis and IR spectra. Compound 2 is a offspring from reaction of a preformed compound 1 with 4,4′-bipyridyl. The two connected modes of the 2D network layered are provided through μ-atza and/or 4,4′-bipyridyl bridges, and forming 3D supramolecular structures by hydrogen bonding interactions. The dehydration and rehydration processes of compound 1 was investigated [Copyright &y& Elsevier]