Picosecond Raman measurements of electron transfer in the metal-to-ligand charge-transfer excited states of 1,10-phenanthroline-ruthenium(II) complexes
- Louisiana State Univ., Baton Rouge (USA)
Picosecond time-resolved resonance Raman spectroscopy has been utilized to investigate the metal-to-ligand charge-transfer (MLCT) excited states of Ru(II) mixed ligand complexes of 1,10-phenanthroline and 2,2{prime}-bipyridine. A two-color pump and probe technique is shown to provide a powerful method for separating the highly congested spectra of these complexes. The first pure excited-state spectrum of (Ru(phen){sub 3}){sup 2+} has been obtained. It is clearly demonstrated by using this approach that the interpretation of previous nanosecond Raman results on similar complexes is incorrect with respect to the assignments of the electronic-state parentage of the observed vibrational bands. The implications of these results are discussed with respect to the dynamics of interligand electron transfer in the excited MLCT state.
- OSTI ID:
- 6660945
- Journal Information:
- Journal of Physical Chemistry; (USA), Journal Name: Journal of Physical Chemistry; (USA) Vol. 94:2; ISSN 0022-3654; ISSN JPCHA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400201* -- Chemical & Physicochemical Properties
AROMATICS
AZAARENES
CHARGE TRANSPORT
COMPLEXES
DATA
DATA ANALYSIS
ELECTRON TRANSFER
ENERGY LEVELS
EXCITED STATES
EXPERIMENTAL DATA
HETEROCYCLIC COMPOUNDS
INFORMATION
LASER SPECTROSCOPY
MEASURING INSTRUMENTS
MEASURING METHODS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PHENANTHROLINES
RAMAN SPECTROSCOPY
RUTHENIUM COMPLEXES
SPECTROSCOPY
TRANSITION ELEMENT COMPLEXES