Spontaneous N formation by a diruthenium complex enables electrocatalytic and aerobic oxidation of ammonia.

The electrochemical conversion of ammonia to dinitrogen in a direct ammonia fuel cell (DAFC) is a necessary technology for the realization of a nitrogen economy. Previous efforts to catalyse this reaction with molecular complexes required the addition of exogenous oxidizing reagents or application of potentials greater than the thermodynamic potential for the oxygen reduction reaction-the cathodic process of a DAFC. We report a stable metal-metal bonded diruthenium complex that spontaneously produces dinitrogen from ammonia under ambient conditions.

Coordination of Hydrogen Peroxide with Late-Transition-Metal Sulfonamido Complexes.

Adducts of hydrogen peroxide and transition metals have been implicated as intermediates in biological and industrial processes but have only recently been observed. Therefore, knowledge of how hydrogen peroxide interacts with transition metals is extremely limited. Herein, we report the synthesis of HO complexes of cobalt, nickel, and copper supported by sulfonamido ligands with second-sphere hydrogen bonding.

Hydrogen Peroxide Coordination to Cobalt(II) Facilitated by Second-Sphere Hydrogen Bonding.

M(H2 O2 ) adducts have been postulated as intermediates in biological and industrial processes; however, only one observable M(H2 O2 ) adduct has been reported, where M is redox-inactive zinc. Herein, direct solution-phase detection of an M(H2 O2 ) adduct with a redox-active metal, cobalt(II), is described. This Co(II) (H2 O2 ) compound is made observable by incorporating second-sphere hydrogen-bonding interactions between bound H2 O2 and the supporting ligand, a trianionic trisulfonamido ligand.

Hydrogen Peroxide Complex of Zinc.

Metal(H2O2) complexes have been implicated in kinetic and computational studies but have never been observed. Accordingly, H2O2 has been described as a very weak ligand. We report the first metal(H2O2) adduct, which is made possible by incorporating intramolecular hydrogen-bonding interactions with bound H2O2.

Effective delivery of IgG-antibodies into infected cells via dendritic molecular transporter conjugate IgGMT.

IgG antibody-transporter conjugates enable intracellular uptake of biologically active IgG antibodies that inhibit viral mediated syncytia formation in respiratory syncytial virus green fluorescent protein (RSV-GFP) infected human epithelial cells (HEp-2).