Resonance Raman spectra of ruthenium(II) complexes of bipyridine and substituted bipyridines: ground- and excited-state properties
Resonance-enhanced Raman vibrational spectra are reported for Ru(bpy)/sub 3//sup 2 +/ and trissubstituted complexes of bipyridine substituted at the ring 4-position, Ru(4-Xbpy)/sub 3//sup n+/: X = NO/sub 2/, OEt(n = 2); X = PEt/sub 3//sup +/ (n = 5). For comparison, spectra of Ru(bpy)/sub 2/Cl/sub 2/, Ru(4,4'-Me/sub 2/bpy)/sub 3//sup 2 +/, and Ru(4,4'-(NO/sub 2/)/sub 2/bpy)/sub 2/Cl/sub 2/ are presented and analyzed. Analysis of the resonance Raman spectra for this series provides evidence for the nature of the bipyridine ring substituent effects on the electronic properties of the complexes. The ground-state properties are perturbed as shown by frequency shifts and the appearance of additional resonance-enhanced Raman bands. In addition, the variation in the relative intensities of the resonance-enhanced Raman bands can be related to the polarization of the excited state for the metal to ligand charge-transfer bands in resonance due to electronic effects of th substituents.
- Research Organization:
- City Univ. of New York, Flushing
- OSTI ID:
- 6593756
- Journal Information:
- Inorg. Chem.; (United States), Journal Name: Inorg. Chem.; (United States) Vol. 21:6; ISSN INOCA
- Country of Publication:
- United States
- Language:
- English
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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ABSORPTION SPECTRA
AZINES
BIPYRIDINES
CHALCOGENIDES
COMPARATIVE EVALUATIONS
COMPLEXES
DATA
ELECTRONIC STRUCTURE
ENERGY LEVELS
EXCITED STATES
EXPERIMENTAL DATA
GROUND STATES
HETEROCYCLIC COMPOUNDS
INFORMATION
NITROGEN COMPOUNDS
NITROGEN OXIDES
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PYRIDINES
RAMAN SPECTRA
RUTHENIUM COMPLEXES
SPECTRA
STEREOCHEMISTRY
TRANSITION ELEMENT COMPLEXES
VIBRATIONAL STATES