Photochemistry of hetero-tris-chelated ruthenium(II) polypyridine complexes in dichloromethane

The results of an investigation of the photochemical and photophysical properties of a series of complexes of the type (RuL{sub 2}L{prime})Cl{sub 2} are reported, where L and L{prime} are bipyridine, phenanthroline, and methyl and phenyl derivatives of those ligands. All measurements were conducted...

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Bibliographic Details
Published in:Inorganic chemistry 1989-06, Vol.28 (12), p.2281-2285
Main Authors: Jones, Wayne E, Smith, Robert A, Abramo, Marsha T, Williams, Michael D, Van Houten, J
Format: Article
Language:English
Subjects:
140505 - Solar Energy Conversion- Photochemical, Photobiological, & Thermochemical Conversion- (1980-)
400500 - Photochemistry
AROMATICS
AZAARENES
AZINES
CHEMISTRY
CHLORINE COMPOUNDS
COMPLEXES
CONVERSION
DATA
ENERGY CONVERSION
Exact sciences and technology
EXPERIMENTAL DATA
General and physical chemistry
HALOGEN COMPOUNDS
HETEROCYCLIC COMPOUNDS
INFORMATION
INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PHENANTHROLINES
PHOTOCHEMISTRY
Physical chemistry of induced reactions (with radiations, particles and ultrasonics)
PYRIDINES
RUTHENIUM COMPLEXES
SOLAR ENERGY
TRANSITION ELEMENT COMPLEXES
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Summary:The results of an investigation of the photochemical and photophysical properties of a series of complexes of the type (RuL{sub 2}L{prime})Cl{sub 2} are reported, where L and L{prime} are bipyridine, phenanthroline, and methyl and phenyl derivatives of those ligands. All measurements were conducted in CH{sub 2}Cl{sub 2}. Luminescence lifetime and quantum yield data indicate that the ligand which accepts the electron in the localized MLCT excited state plays a significant role in the excited-state decay. HPLC analysis of the organic photoproducts from mixed-ligand complexes shows that flexible bipyridyl ligands are preferentially photolabilized, consistent with a dissociative mechanism involving an open-ended bipyridine in the transition state. 55 refs., 2 tabs.
ISSN:0020-1669
1520-510X
DOI:10.1021/ic00311a008