Arylarsonate- and Phosphonate-Capped Polyoxomolybdates, [(RCHAs)MoO] and [(R'CHP)MoO].

We report on the synthesis and structural characterization of four arylarsonate- and phosphonate-capped polyoxomolybdates that exhibit different organic substituents in the para position of the phenyl group. The reaction of arylarsonates (RAsO, wherein R = 4-BrCH or 4-NCH) with molybdate in aqueous pH 3.5 media resulted in the cyclic hexamolybdates [(BrCHAs)MoO] () and [(NCHAs)MoO] (), whereas the reaction of arylphosphonates (R'PO, wherein R' = 4-OCCH or 4-OCCHCH) with molybdate in aqueous pH 3 media resulted in the cyclic pentamolybdates [(OCCHP)MoO] () and [(HOCCHCHP)MoO] (), respectively.

Shape and Size Tuning of Bi-Centered Polyoxopalladates: High Resolution Bi NMR and Bi Radiolabeling for Potential Pharmaceutical Applications.

We have discovered five bismuth(III)-containing polyoxopalladates (POPs) which were fully characterized by solution and solid-state physicochemical techniques: the cube-shaped [BiPdO(AsPh)] (BiPdAsL), [BiPdO(AsCHN)] (BiPdAsL), and [BiPdO(AsCHCOO)] (BiPdAsL) as well as the star-shaped [BiPdO(PO)H] (BiPdP) and [BiPdO(PPh)] (BiPdPL), respectively. The organically modified capping groups phenylarsonate, -azidophenylarsonate, and -carboxyphenylarsonate were chosen as the azido (-N) and carboxyl (-COOH) groups open up opportunities to covalently conjugate (via click reaction, amide coupling, etc.) with targeting vectors.

A Mononuclear Co(II) Coordination Complex Locked in a Confined Space and Acting as an Electrochemical Water-Oxidation Catalyst: A "Ship-in-a-Bottle" Approach.

Preparing efficient and robust water oxidation catalyst (WOC) with inexpensive materials remains a crucial challenge in artificial photosynthesis and for renewable energy. Existing heterogeneous WOCs are mostly metal oxides/hydroxides immobilized on solid supports. Herein we report a newly synthesized and structurally characterized metal-organic hybrid compound [{Co3 (μ3 -OH)(BTB)2(dpe)2} {Co(H2O)4(DMF)2}0.

Synthesis, characterization and magnetism of metal-organic compounds: role of the positions of the coordinating groups of a meso-flexible ligand in placing anisotropy to exhibit spin-canting behaviour.

In continuation of our recent investigation on flexible ligands, three new metal-organic coordination framework containing compounds, formulated as {Co(2)(L2)2(px3ampy)(2)}(n)·npx3ampy (1), {Co(L2)(px3ampy)(0.5)}(n) (2) and {Co(2)(L3) (px3ampy)(2)(H(2)O)}(n)·3nH(2)O (3) have been synthesized using three structurally different meso-flexible polycarboxylate ligands, H(2)L1(4,4'-methylenebis-(oxy)dibenzoic acid), H(2)L2 (3,3'-methylenebis-(oxy)dibenzoic acid) and H(4)L3 (5,5'-methylene-bis(oxy)diisophthalic acid) bearing the flexible spacer in the middle of the skeleton, along with a long flexible pyridyl ligand px3ampy (1,4-bis(3-pyridylaminomethyl)benzene). Compounds 1-3 have been characterized by single crystal X-ray diffraction analysis, IR spectroscopy and thermogravimetric (TG) studies including elemental analysis.