Rigid medium stabilization of metal-to-ligand charge transfer excited states
Article Abstract:
A steady-state and time-resolved absorption and emission measurements were used to study the salts [Ru[(bpy).sub.3]][(P[F.sub.6]).sub.2], cis-[Ru[(bpy).sub.2]][(py).sub.2]][(P[F.sub.6]).sub.2],trans-[Ru[(bpy).sub.2]][(4-Etpy).sub.2]][(P[F.sub.6]).sub.2], [Ru[(tpy).sub.2]][(P[F.sub.6]).sub.2] and [Re(bpy)[(CO).sub.3](4-Etpy)](P[F.sub.6]) in which bpy stands for 2,2'-bipyridine, py for pyridine, 4-Etpy for 4-ethylpyridine and tpy for 2,2':6',2-terpyridine, added to poly(methyl methacrylate ) (PMMA) films and their photophysical properties. It is suggested that the inhibition of metal-ligand bond breaking and a photochemical cage effect results in the 'rigid medium stabilization effect ' for cis-[Ru[(bpy).sub.2]][(py).sub.2]][(P[F.sub.6]).sub.2] in PMMA.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2007
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Diffusional mediation of surface electron transfer on TiO2
Article Abstract:
Research was conducted to examine the diffusional mediation of surface electron transfer on TiO2. The kinetic study involved the cross-surface electron transfer in the reversible oxidation of (Os(super II)(bpy)2(4,4'-(CO2H)2bpy))(PF6)2 to OsIII surface adsorbed to nanocrystalline TiO2 films. Results demonstrate that the electron-transfer mediation of the oxidative component of the Os(super III/II) surface couple takes place in the presence of added Ru(bpy)(sub 3)(super 2+).
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 1999
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Energy transfer from luminescent porous silicon to adsorbed osmium(II) and ruthenium(II) polypyridyl complexes
Article Abstract:
A model was developed to analyze and define the properties of an energy transfer from luminescent porous silicon (p-Si) to adsorbed osmium(II) and ruthenium(II) polypyridyl complex compounds. The complex's surface adsorption on p-Si wafers quenched the emission. Facile energy transfer shifts from the surface to Ru(II) and Os(II) complexes. Such transfer is faster and more efficient for Os(II) than for Ru(II).
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 1998
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