14 research outputs found
Photoâ and Electrochemical Properties of a CO<sub>2</sub> Reducing RutheniumâRhenium QuaterpyridineâBased Catalyst
The bridging ligand 2,2â˛,5â˛,3â˛â˛,6â˛â˛,2â˛â˛â˛âquaterpyridine was utilised to tether [(bpy)2Ru]2+ and [Re(CO)3Cl] subunits for the purpose of photocatalytic CO2 reduction. The photophysics and electrochemistry of the complex and associated mononuclear species are reported herein, in addition to photocatalytic, picosecond timeâresolved infrared and computational studies. Photophysical, timeâresolved IR, and electrochemical data together with quantum chemical calculations indicate weak communication between the two metal centres. As a result of the electronâwithdrawing effect of the ligand on both the Ru and Re subunits, the reducing power of the photosensitiser and catalytic unit were significantly attenuated relative to the intermolecular approach utilising [(bpy)3Ru]2+ and (bpy)Re(CO)3Cl
Photo-activated CO-release in the amino tungsten Fischer carbene complex, [(CO)<sub>5</sub>WC(NC<sub>4</sub>H<sub>8</sub>)Me], picosecond time resolved infrared spectroscopy, time-dependent density functional theory, and an antimicrobial study
Photo-activated CO-release in the amino tungsten Fischer carbene complex, [(CO)<sub>5</sub>WC(NC<sub>4</sub>H<sub>8</sub>)Me], picosecond time resolved infrared spectroscopy, time-dependent density functional theory, and an antimicrobial study
Genomic inbreeding estimation in small populations: evaluation of runs of homozygosity in three local dairy cattle breeds
Evidence for cobalt-cobalt bond homolysis and wavelength-dependent CO loss in (mu(2)-Alkyne)Co-2(CO)(6) complexes
An investigation into the photochemistry of, and the electrochemically induced CO-loss from, [(CO)<sub>5</sub>MC(OMe)Me](M = Cr or W) using low-temperature matrix isolation, picosecond infrared spectroscopy, cyclic voltammetry, and time-dependent density functional theory
Supramolecular Bimetallic Assemblies for Photocatalytic Hydrogen Generation from Water
A series of supramolecular assemblies of the type [Ru(L-L)2(Lâ-L)MX2)]n+ are reported where L-L is 2,2â-bipyridine (bipy) 4,4â-di-tetra-butyl-bipyridine (tbbipy) or 4,4â-diethoxycarbonyl-2,2â-bipyridine (dceb) and L-Lâ is tetrapyrido[3,2-a:2â,3â-c:3ââ,2ââ-h:2âââ,3âââ-j]phenazine (tpphz), 2,2â:5â,2â-terpyridine (2,5-bpp), 2,2â:6â,2â-terpyridine, (2,6-bpp), 2,5-di(pyridine-2-yl)pyrazine (2,5-dpp) or 2,3-di(pyridine-2-yl)pyrazine (2,3-dpp), and MX2 is PdCl2, PtCl2 or PtI2. The photocatalytic behaviour with respect to hydrogen generation of these compounds and their ultrafast photophysical properties are discussed as a function of the nature of the peripheral ligands, the bridging ligands and the catalytic centre. The results obtained show how differences in the chemical composition of the photocatalysts can affect intramolecular photoinduced electron transfer processes and the overall photocatalytic efficienc