✦ LIBER ✦

Vibronic coupling with low-frequency vibrations in quasi-forbidden Frenkel exciton states

✍ Scribed by Piotr Petelenz

Publisher: Elsevier Science
Year: 1994
Tongue: English
Weight: 394 KB
Volume: 229
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(94)01089-7

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✦ Synopsis

A simple dimer model is used to demonstrate that in weakly allowed Frenkel exciton states, where the factor-group splitting is largely due to charge transfer interactions, the exciton-phonon coupling constant may be considerably different for the two Davydov components. The model is applied to the S, transition of the naphthalene crystal and suggests a smaller Davydov splitting than normally assumed (60 cm-' rather than 150 cm-' ).