Rapid polarity reversal in the charge-transfer excited state of 9,9 prime -bianthryl

Journal Article · Thu Apr 20 04:00:00 EDT 1989 · Journal of Physical Chemistry; (USA)

DOI:https://doi.org/10.1021/j100345a011· OSTI ID:5115540

Toublanc, D B; Fressenden, R W ^[1]; Hitachi, A ^[2]

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1. Univ. of Notre Dame, IN (USA)
2. Waseda Univ., Tokyo (Japan)

A number of studies, including transient microwave absorption, of the fluorescent excited state of 9,9{prime}-bianthryl have clearly shown this state to have a significant dipole moment. One anthryl group spontaneously becomes positive and the other negative. Further microwave experiments are reported here which measure both absorption and dispersion associated with the reorientation of the dipole. These results show an excess of dispersion which is far too large to come from the rotation of the molecule as a whole. Rapid internal reversal of the dipole with a relaxation time of about 10 ps is suggested to account for the data.

• OSTI ID: 5115540
• Journal Information: Journal of Physical Chemistry; (USA), Journal Name: Journal of Physical Chemistry; (USA) Vol. 93:8; ISSN JPCHA; ISSN 0022-3654
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400500* -- Photochemistry
ABSORPTION SPECTROSCOPY
AROMATICS
BENZENE
CHEMICAL REACTIONS
CHEMISTRY
DECOMPOSITION
DIPOLE MOMENTS
ELECTRON TRANSFER
ENERGY LEVELS
EXCITED STATES
HYDROCARBONS
LIFETIME
MICROWAVE SPECTRA
ORGANIC COMPOUNDS
PHOTOCHEMICAL REACTIONS
PHOTOCHEMISTRY
PHOTOLYSIS
POLARIZATION
REACTION INTERMEDIATES
RELAXATION
SPECTRA
SPECTROSCOPY