Rapid solvent-induced recombination and slow energy relaxation in a simple chemical reaction: Picosecond studies of iodine photodissociation in CCl/sub 4/

Journal Article · Sun Mar 03 23:00:00 EST 1985 · Phys. Rev. Lett.; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.54.951· OSTI ID:6009495

Berg, M; Harris, A L; Harris, C B

The time scale for solvent ''caging'' in the classic I/sub 2/ photodissociation reaction appears to be < or =15 ps, on the basis of examination of new picosecond absorption spectra. The previously observed slow recovery (>100 ps) of molecular absorption is shown to be due to both ground-state vibrational relaxation and excited-state trapping in the recombined molecule. In addition, newly observed absorptions in the 350--400-nm region provide direct information on solvent-induced predissociation and excited-state vibrational relaxation.

• Research Organization: Department of Chemistry, University of California at Berkeley, and the Materials and Molecular Research Division, Lawrence Berkeley Laboratory, Berkeley, California 94720
• OSTI ID: 6009495
• Journal Information: Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 54:9; ISSN PRLTA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400500* -- Photochemistry
ABSORPTION SPECTRA
CARBON TETRACHLORIDE
CHEMISTRY
CHLORINATED ALIPHATIC HYDROCARBONS
DISSOCIATION
ELEMENTS
ENERGY LEVELS
EXCITED STATES
GROUND STATES
HALOGENATED ALIPHATIC HYDROCARBONS
HALOGENS
IODINE
NONMETALS
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
PHOTOCHEMISTRY
RECOMBINATION
SOLVENT PROPERTIES
SPECTRA
TRAPPING
VIBRATIONAL STATES