Nickel(II) bis(diphosphine) complexes that contain positioned bases in the second coordination sphere have been found to catalyze the reduction of O(2) with H(2) to selectively form water. The complexes also serve as electrocatalysts for the reduction of O(2) with the addition of a weak acid. In contrast, a closely related nickel diphosphine complex without the positioned bases is catalytically...

The title mononuclear nickel(II) complex, [Ni(C(9)H(9)ClNO(2))(2)]·H(2)O, was obtained by the reaction of 5-chloro-salicyl-aldehyde, 2-amino-ethanol and nickel nitrate in methanol. The Ni atom is six-coordinated by two phenolate O, two imine N and two hy-droxy O atoms from two crystallographically different Schiff base ligands, forming an octa-hedral geometry. In the crystal, mol-ecules are lin...

Using spin-polarized density functional theory calculations, we study binding properties of small metal nanoclusters (Cu(13) and Al(13)) onto carbon nanotubes (CNTs). On defect-free CNTs, the binding affinity with the Cu or Al cluster is very weak. When various defects such as vacancies, substitutional nickel defects, and nickel adatoms are introduced in CNTs to increase the binding strength, t...

A completely green synthesis protocol has been adopted to obtain silver nanoaggregates capped by the natural compound (1E, 6E)-1,7-bis(4-hydroxy-3-methoxyphenyl)-1,6-heptadiene-3,5-diene), also known as curcumin. The synthesis has been monitored by infrared, Raman, visible and fluorescence spectroscopies. Characterization confirms that curcumin reduces and caps the nanoparticles, and such a pro...

In this article, new metal-mediated cyclization and reductive coupling reactions of bicyclic olefins with alkynes are described. Oxabicyclic alkenes undergo cyclization with alkyl propiolates at 80 °C catalyzed by nickel complexes to give benzocoumarin derivatives in high yields. The reaction of bicyclic alkenes (oxaand azacyclic alkenes) with alkyl propiolates at room temperature in the presen...