Ultrafast electronic deactivation and vibrational dynamics of photoexcited uranium(IV) porphyrin sandwich complexes
Journal Article
·
· Journal of Physical Chemistry; (United States)
- Washington Univ., St. Louis, MO (United States)
- Univ. of Illinois, Champaign-Urbana (United States)
The ground- and excited-state optical spectra of two U[sup IV] bis(porphyrin) sandwich complexes reveal features characteristic of porphyrins held within van der Waals contact. The photoexcited complexes exhibit ultrafast (approximately 1 ps) deactivation to the ground electronic state in a multistep process involving intersystem crossing into the triplet manifold and subsequent relaxation via ligand-field (f,f) excited state(s). This ultrafast and highly energetic electronic deactivation is followed by complex time-dependent spectral changes on the picosecond time scale that are ascribed to vibrational relaxation in the ground electronic state. 22 refs., 5 figs.
- OSTI ID:
- 5712031
- Journal Information:
- Journal of Physical Chemistry; (United States), Vol. 97:28; ISSN 0022-3654
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
74 ATOMIC AND MOLECULAR PHYSICS
URANIUM COMPLEXES
ELECTRONIC STRUCTURE
PHOTOCHEMISTRY
SPECTROSCOPY
VIBRATIONAL STATES
PORPHYRINS
ACTINIDE COMPLEXES
CARBOXYLIC ACIDS
CHEMISTRY
COMPLEXES
ENERGY LEVELS
EXCITED STATES
HETEROCYCLIC ACIDS
HETEROCYCLIC COMPOUNDS
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
400500* - Photochemistry
400102 - Chemical & Spectral Procedures
664200 - Spectra of Atoms & Molecules & their Interactions with Photons- (1992-)
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
74 ATOMIC AND MOLECULAR PHYSICS
URANIUM COMPLEXES
ELECTRONIC STRUCTURE
PHOTOCHEMISTRY
SPECTROSCOPY
VIBRATIONAL STATES
PORPHYRINS
ACTINIDE COMPLEXES
CARBOXYLIC ACIDS
CHEMISTRY
COMPLEXES
ENERGY LEVELS
EXCITED STATES
HETEROCYCLIC ACIDS
HETEROCYCLIC COMPOUNDS
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
400500* - Photochemistry
400102 - Chemical & Spectral Procedures
664200 - Spectra of Atoms & Molecules & their Interactions with Photons- (1992-)