Selective perturbation of ligand field excited states in polypyridine ruthenium(II) complexes
A new bipyridine-type ligand which allows the selective perturbation of ligand field (LF) excited-state energies is introduced. Any metal-to-ligand charge-transfer (MLCT) excited states occur at nearly the same energy as in the bipyridine complex. The syntheses of the corresponding ruthenium(II) complexes and their photophysical properties are reported. The results clearly support a current model for the excited-state behavior of polypyridine complexes in which the lowest MLCT decays by thermal population of a higher lying LF state. This method of selective LF-state perturbation nicely complements the perturbation of MLCT states achieved by modification of the ligand's reduction potential.
- Research Organization:
- Louisiana State Univ., Baton Rouge
- OSTI ID:
- 6312842
- Journal Information:
- J. Am. Chem. Soc.; (United States), Journal Name: J. Am. Chem. Soc.; (United States) Vol. 106:20; ISSN JACSA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400500* -- Photochemistry
AZINES
BIPYRIDINES
CHEMISTRY
COMPLEXES
DATA
ENERGY LEVELS
EXCITED STATES
EXPERIMENTAL DATA
HETEROCYCLIC COMPOUNDS
INFORMATION
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PHOTOCHEMISTRY
PYRIDINES
RUTHENIUM COMPLEXES
TRANSITION ELEMENT COMPLEXES