The B&.sbnd;X (3500 Å) transition of azulene: Medium-dependent effects attributable to vibronic coupling and vibronic Fermi resonance
✍ Scribed by A.R. Lacey; E.F. McCoy; I.G. Ross
- Publisher
- Elsevier Science
- Year
- 1973
- Tongue
- English
- Weight
- 903 KB
- Volume
- 21
- Category
- Article
- ISSN
- 0009-2614
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✦ Synopsis
The vibrational structure of the absorption spectrum of azuiene near 3500 .% (to the semnd excited singiet state, % is marked& altered by chvlting the molecular environment, even though the corresponding emission spectrum remains largely unchanged, The interpretation proposed invokesvibronic coupling suffibenz~y nroq (i) to erect LG~ changes in the vibrational energy levels of surf B, 0.i) ~0 -upi=vibron;dly nrGve modes ta each other, 2nd (iii] to induce resonances ts-ith mote tvio-ctuantum states oE the right symmetry. The coupling is to a hgher State D, and the effects of different media are attributed to modifications of the energy gap between the g and 6 #_ates.