Vibronic activity probed by laser jet spectroscopy

Technical Report · Tue Oct 01 04:00:00 EDT 1985

OSTI ID:5188763

Warren, J A

Laser jet spectroscopy is applied to study the vibronic activity in ..beta..-methylnaphthalene and phenanthrene. Results of these studies indicate that the technique is invaluable in the determination of the mechanisms and spectral manifestations of vibronic coupling in large polyatomic species. In the S/sub 1/ state of ..beta..-methylnaphthalene, a Duschinsky rotation of normal coordinates results in extensive mode mixing as evidenced by highly structured single vibronic level (SVL) fluorescence spectra and drastic absorption/fluorescence mirror symmetry breakdown (MSB). In phenanthrene, absorption/fluorescence MSB is shown to be primarily the result of Condon/Herzberg-Teller transition moment interferences and model calculations again indicate that simple first order formulae can be used to reproduce the observed spectra.

• Research Organization: Ames Lab., IA (USA)
• DOE Contract Number: W-7405-ENG-82
• OSTI ID: 5188763
• Report Number(s): IS-T-1205; ON: DE86016038
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
AROMATICS
CONDENSED AROMATICS
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EXCITED STATES
HYDROCARBONS
LASER SPECTROSCOPY
MODE SELECTION
NAPHTHALENE
ORGANIC COMPOUNDS
PHENANTHRENE
SPECTROSCOPY
VIBRATIONAL STATES