Hybrid organo-inorganic materials of the VPO system

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Structure and magnetic properties of an organic-inorganic hybrid compound : Zn/Cu (biquinoline)(VO2)(PO4H2)(PO4H).(H20)n

J. Chil. Chem. Soc., 2007, 51, 1173-117

Influence of structural changes on photophysical properties of terpyridine derivates: Experimental studies and theoretical calculations

International audienceFour terpyridine ligands containing different aryl substituents 4'-(4-quinolinyl)-3,2':6′,3″-terpyridine (3-qtpy), 4'-(4-quinolinyl)-2,2':6′,2″-terpyridine (2-qtpy), 4'-(3-methyl-2-thienyl)-4,2':6′,4″-terpyridine (4-stpy) and 4'-(3-methyl-2-thienyl)-2,2':6′,2″-terpyridine (2-stpy) were synthesized in a one-pot procedure and characterized by elemental analysis, FT-IR and 1H- and 13C NMR spectroscopy. Additionally, the 2-stpy structure was confirmed by single crystal X-ray diffraction analysis. The influence of the N-position in the tpy and aryl substituents on the photophysical properties was systematically investigated by spectroscopic methods and simulated by density functional theory (DFT and TD-DFT) calculations. Thermal stability was observed until about 280 °C, making these kind of ligands interesting candidates for their use as complex ligands, which are obtained by solvothermal synthesis under temperatures of about 180 °C. The electrochemical behavior was also investigated. All molecules show irreversible anodic and cathodic voltammetric peaks in organic medium

Direct and Reverse Limiting Series of Transition Metal Phosphides with Ordered Defects and Metal/Non Metal Ratio Close to 2

International audienc

Redetermination of Ni5P4

Acta Cryst, 2007, E63, i158-i15

Crystal structure of erbium palladium arsenic, ErPdAs

Z. Kristallogr. NCS, 2007, 222, 11-1

Unusual trinuclear complex of copper(II) containing a 4′-(3-methyl-2-thienyl)-4,2′:6′,4″-terpyridine ligand. Structural, spectroscopic, electrochemical and magnetic properties

International audienceWe report the synthesis, characterization, crystal and molecular structure as well as the spectroscopic, electrochemical and magnetic properties of an unexpected trinuclear copper(II) complex (1), made of three Cu(2-TTA)2 units (2-TTA = 2-thenoyltrifluoroacetone) bridged by two 4'-(3-methyl-2-thienyl)-4,2′:6′,4″-terpyridine (4-stpy) ligands. The central Cu(II) atom shows an octahedral geometry, while the lateral metal centers present a slightly distorted square pyramidal coordination sphere. It is suggested that the introduction of the relatively bulky substituent groups (2-thienyl and [sbnd]CF3) in the 2-TTA ligand are responsible of this uncommon coordination mode. The magnetic behavior of 1 is reported in terms of a combination of monomer and dimer units, leading to weak antiferromagnetic interaction (J = −1.93 cm−1). The cyclovoltammogram of 1 exhibits, in the cathodic potential region, three redox events due to Cu2+/Cu+ and Cu+/Cu0 redox couples and to the mono-electronic reduction of the 4-stpy ligand