Carbon monoxide oxidation over ruthenium catalysts has shown an unusual catalytic behavior. Here we report a particle size effect on CO oxidation over Ru nanoparticle (NP) catalysts. Uniform Ru NPs with a tunable particle size from 2 to 6 nm were synthesized by a polyol reduction of Ru(acac)(3) precursor in the presence of poly(vinylpyrrolidone) stabilizer. The measurement of catalytic activity...

We report the successful use of Ru(II)(terpy)(2) (1, terpy = 2,2':6',2''-terpyridine) as a catalyst in the Belousov-Zhabotinsky (BZ) oscillating chemical reaction. We also examine several additional Ru(II) complexes, Ru(II)(bipy)(2)(L')(2) (2, L' = 4-pyridinecarboxylic acid; bipy = 2,2'-bipyridine) and Ru(II)(bipy)(2)(L'') (3, L'' = 4,4'-dicarboxy-2,2'-bipy; 4, L'' = N-allyl-4'-methyl-[2,2'-bip...

In the title compound, [RuCl(2)(C(6)H(6))(C(19)H(17)P)], the Ru(II) atom has a distorted pseudo-octa-hedral coordination environment with the metrical parameters around the metallic core as Ru-centroid(η(6)-benzene) = 1.6894 (11) Å, Ru-P = 2.3466 (6), Ru-Cl(avg.) = 2.4127 (7) Å; Cl-Ru-Cl = 88.07 (2) and Cl-Ru-P = 82.77 (2), 87.65 (2)°. The effective cone angle for the benzyl-diphenyl-phosphane ...

In the title compound, [Ru(3)(C(6)H(12)Cl(3)O(3)P)(C(29)H(30)P(2))(CO)(9)], the bis-(di-o-tolyl-phosphan-yl)methane ligand bridges one Ru-Ru bond and the monodentate phosphite ligand bonds to the third Ru atom. Both ligands are equatorial with respect to the Ru(3) triangle. Each Ru atom bears one equatorial and two axial terminal carbonyl ligands. The dihedral angles between the two benzene rin...

Diaminostannylenes react with [Ru(3)(CO)(12)] without cluster fragmentation to give carbonyl substitution products regardless of the steric demand of the diaminostannylene reagent. Thus, the Sn(3)Ru(3) clusters [Ru(3){μ-Sn(NCH(2)(t)Bu)(2)C(6)H(4)}(3)(CO)(9)] (4) and [Ru(3){μ-Sn(HMDS)(2)}(3)(CO)(9)] (6) [HMDS = N(SiMe(3))(2)] have been prepared in good yields by treating [Ru(3)(CO)(12)] with an ...

Water oxidation is a linchpin in solar fuels formation, and catalysis by single-site ruthenium complexes has generated significant interest in this area. Combining several theoretical tools, we have studied the entire catalytic cycle of water oxidation for a single-site catalyst starting with [Ru(II)(tpy)(bpm)(OH(2))](2+) (i.e., [Ru(II)-OH(2)](2+); tpy is 2,2':6',2''-terpyridine and bpm is 2,2'...

In the title triangulo-triruthenium(0) compound, [Ru(3)(C(25)H(22)As(2))(C(6)H(12)Cl(3)O(3)P)(CO)(9)], the bis-(diphenyl-arsino)methane ligand bridges an Ru-Ru bond and the monodentate phosphine ligand bonds to the third Ru atom. Both the arsine and phosphine ligands are equatorial with respect to the Ru(3) triangle. In addition, each Ru atom carries one equatorial and two axial terminal carbon...

The electrogenerated chemiluminescence (ECL) of Ru(dp-bpy):+ (dp-bpy = 4,4’-diphenyl-2,2’bipyridine) and Ru(dp-phen):+ (dp-phen = 4,7-diphenyl-l,lO-phenanthroline) in acetonitrile and aqueous solutions was studied. The diphenyl-substituted compounds produced a more intense emission than the nonsubstituted Ru(bpy):+ Ru(dp-phen):+ m acetonitrile. The ECL efficiencies, dECL, of Ru(dp-bpy):+ and we...

ru/al2o3 catalysts were prepared by conventional incipient wetness impregnation as well as colloid deposition of rucl3 precursor via in situ reduction with ethylene glycol (polyol) method on alumina support. the samples were characterized by tem, xrd and tpr techniques. the catalytic performance tests were carried out in a fixed-bed micro-reactor under different operating conditions. ethylene g...

The relationships between the intervalence energy (E(IT)) and the free energy difference (DeltaG) that exists between the minima of redox isomers (Fe(II)-Ru(III)/Fe(III)-Ru(II)) for various heterobimetallic complexes [(R-Fcpy)Ru(NH(3))(5)](2+/3+) (R = H, ethyl, Br, actyl; Fcpy = (4-pyridyl)ferrocenyl; Ru(NH(3))(5) = pentaam(m)ineruthenium) were examined. The changes in DeltaG for the complexes ...