MLCT excited states. Role of the hydrido ligand in hydrido polypyridyl complexes of osmium(II) and ruthenium(II)

Journal Article · Wed Nov 01 04:00:00 EST 1989 · Inorganic Chemistry; (USA)

DOI:https://doi.org/10.1021/ic00321a011· OSTI ID:7071164

Megehee, E G; Meyer, T J ^[1]

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1. Univ. of North Carolina, Chapel Hill (USA)

The photochemical and photophysical properties of the complexes (M(bpy){sub 2}(CO)X)PF{sub 6} (bpy = 2,2{prime}-bipyridine; M = Os, X = H, D, Cl; M = Ru, X = H, D) are reported in 4:1 ethanol/methanol solution from 90 to 300 K. Metal to ligand charge-transfer (MLCT) excitation fails to induce metal hydride photochemistry, but oxidative or reductive quenching of (Os(bpy){sub 2}(CO)H){sup +*} does induce a net redox chemistry. There is no evidence for significant contributions to the emission spectrum nor to nonradiative decay by the {nu}(Os-H) mode. For the analogous complex of Ru, there is a significant {nu}(Ru-H) k{sub H}/k{sub D} kinetic isotope effect for nonradiative decay. 37 refs., 4 figs., 4 tabs.

• OSTI ID: 7071164
• Journal Information: Inorganic Chemistry; (USA), Journal Name: Inorganic Chemistry; (USA) Vol. 28:22; ISSN 0020-1669; ISSN INOCA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
400202 -- Isotope Effects
Isotope Exchange
& Isotope Separation
400500 -- Photochemistry
AZINES
BIPYRIDINES
CARBONYLS
CHEMISTRY
CHLORIDES
CHLORINE COMPOUNDS
COMPLEXES
DATA
DEUTERIDES
DEUTERIUM COMPOUNDS
EXPERIMENTAL DATA
HALIDES
HALOGEN COMPOUNDS
HETEROCYCLIC COMPOUNDS
HYDRIDES
HYDROGEN COMPOUNDS
INFORMATION
ISOTOPE EFFECTS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OSMIUM COMPLEXES
PHOTOCHEMISTRY
PYRIDINES
RUTHENIUM COMPLEXES
TRANSITION ELEMENT COMPLEXES