Supramolecular network of a framework material supported by the anion-π linkage of Keggin-type heteropolyoxotungstates: experimental and theoretical insights.

A novel inorganic-organic hybrid, {Na[Tb(L)(H2O)4]3(SiW12O40)}·4H2O, in which L = 4-hydroxypyridine-2,6-dicarboxylic acid (chelidamic acid), was prepared and characterized by elemental analyses, Fourier transform infrared spectroscopy, and single-crystal X-ray diffraction. It consists of a trinuclear terbium cluster bonded to a Keggin-type polyoxotungstate. In the terbium cluster three crystallographically equivalent Tb3+ ions are bridged by carboxylate oxygen atoms belonging to three chelidamic acid units to form an equilateral triangle.

An inorganic-organic hybrid supramolecular framework based on the γ-[MoO] cluster and cobalt complex of aspartic acid: X-ray structure and DFT study.

A new inorganic-organic hybrid based on an aspartate functionalized polyoxomolybdate, [pentaaquacobalt(II)]-μ-aspartate-[γ-octamolybdate]-μ-aspartate-[pentaaquacobalt(II)] tetrahydrate, [Co(CHNO)(γ-MoO)(HO)]·4HO (1), has been synthesized under hydrothermal conditions from the reaction of an Evans-Showell-type polyoxometalate, (NH)[CoMoHO], and L-aspartic acid. The complex exhibits a supramolecular three-dimensional framework structure in the crystal lattice. Compound 1 was structurally characterized by elemental analyses, IR and UV-Vis (diffuse reflectance) spectroscopy and single-crystal X-ray diffraction.

Photochemical and electrochemical hydrogen evolution reactivity of lanthanide-functionalized polyoxotungstates.

The first example of hydrogen evolution reactivity (HER) of lanthanide-functionalized Keggin-based polyoxotungstates under photochemical and electrochemical conditions is reported. The HER activity under homogeneous, visible light-driven conditions and under heterogeneous, electrochemical conditions depends on the type of lanthanide functionalization, so that a new class of model HER catalysts for systematic reactivity studies is now accessible.

A survey of the different roles of polyoxometalates in their interaction with amino acids, peptides and proteins.

One of the most attractive areas in inorganic chemistry is the synthesis of polyoxometalates (POMs) exhibiting new properties and applications. Since the impact of POMs in biochemistry and related fields of research has increased in the last few years, there has been a special interest in this topic. Significant progress in biological applications has been made where the interaction of POMs with amino acids, peptides and proteins is relevant.

Synthesis, Characterization and Fluorescence Properties of Zn(II) and Cu(II) Complexes: DNA Binding Study of Zn(II) Complex.

Zinc(II) and copper(II) complexes containing Schiff base, 2- methoxy-6((E)-(phenylimino) methyl) phenol ligand (HL) were synthesized and characterized by elemental analysis, IR, NMR, and single crystal X-ray diffraction technique. The fluorescence properties and quantum yield of zinc complex were studied. Our data showed that Zn complex could bind to DNA grooves with Kb = 10(4) M(-1).