250657-42-2Relevant academic research and scientific papers
Long Range Photoinduced Electron Transfer in a Rigid Polymer
Guarr, Tom,McGuire, Mark E.,McLendon, George
, p. 5104 - 5111 (2007/10/02)
Electron (hole) tunnelling reactions are studied in a rigid polymer medium by following the reductive quenching of a series of Ru(LL)3(2+)* homologues by a series of aromatic amines.Tunnelling distances up to 12 Angstroem (edge to edge) are observed.The e
Homogenous Catalysis of the Photoreduction of Water. 6. Mediation by Polypyridine Complexes of Rhuthenium(II) and Cobalt(II) in Alkaline Media
Krishnan, C. V.,Brunschwig, Bruce S.,Creutz, Carol,Sutin, Norman
, p. 2005 - 2015 (2007/10/02)
The emission of (polypyridine)rhutenium(II) complexes (S) is quenched by (polypyridine)cobalt(II) (CoL32+) complexes via parallel oxidative, reductive, and energy-transfer paths, giving CoL3 +S+, CoL33+ + S-, respectively.The oxidative route provides the basis for a new water photoreduction sequence: in mixed acetonitrile-water solvents relatively high cage-escape yields of Ru(4,7-(CH3)2phen)33+ and Co(bpy)3+(S = Ru(4,7-(CH3)2phen)32+, phen = 1,10-phenanthroline, bpy = 2,2'-bipyridine) are obtained.The Ru(III) complex is reduced by triethanolamine (TEOA), and the Co(bpy)3+ reacts with water and/or TEOAH+ to give H2. the maximum H2 quantum yield obtained is 0.29 in 50percent acetonitrile-water.Unusual features of the system are the fact that, at low TEOA, Co(bpy)32+ scavenging of Ru(III) reduces the H2 yield and that the cage-escape and limiting H2 yields are strongly solvent dependent: for the Ru(4,7-(CH3)2phen)32+-Co(bpy)32+-TEOA system the H2 yield increases from cca.0.02 in H2O to 0.29 in the mixed solvent.Reduction potentials for CoL33+/2+ and CoL32+/+ couples are also reported.
