Application of transient infrared spectroscopy to intramolecular energy transfer in [(phen) (CO)[sub 3]Re[sup I](NC) Ru[sup II](CN) (bpy)[sub 2]][sup +]
- Univ. of North Carolina, Chapel Hill, NC (United States)
- Los Alamos National Lab., NM (United States)
- Universita di Ferrara (Italy)
Significant advances have been made in the design and characterization of molecular assemblies, which, when photolyzed, undergo intramolecular electron or energy transfer. Time-resolved resonance Raman spectroscopy has been successfully applied to the study of excited states and molecular assemblies, but time-resolved infrared spectroscopy is particularly well-suited for complexes containing ligands such as CO or CN. Unlike the transient Raman experiment, infrared spectroscopy does not rely on resonance enhancement in the excited state since the metal-CO and -CN stretching vibrations have high oscillator strengths, providing high sensitivity. We describe here a novel application of the technique to the elucidation of intramolecular energy transfer in the ligand-bridged complex [(phen)(CO)[sub 3]Re[sup I](NC) Ru[sup II](CN) (bpy)[sub 2]][sup +] (phen is 1, 10-phenanthroline; bpy is 2,2'-bipyridine). These results show that the transient infrared technique can be a powerful tool for the elucidation of oxidation state and mechanisms involving photochemical intermediates by direct observation of ligand vibrations. 15 refs., 2 figs.
- DOE Contract Number:
- FG05-86ER13633
- OSTI ID:
- 7302072
- Journal Information:
- Journal of the American Chemical Society; (United States), Vol. 115:23; ISSN 0002-7863
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
RHENIUM COMPLEXES
ENERGY TRANSFER
INFRARED SPECTRA
RUTHENIUM COMPLEXES
LASERS
PHOTOLYSIS
REACTION INTERMEDIATES
CHEMICAL REACTIONS
COMPLEXES
DECOMPOSITION
PHOTOCHEMICAL REACTIONS
SPECTRA
TRANSITION ELEMENT COMPLEXES
400201* - Chemical & Physicochemical Properties
400500 - Photochemistry
400102 - Chemical & Spectral Procedures