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Non-Born—Oppenheimer vibronic coupling and deuterium isotope effect on T1 → S0 radiative transitions of aromatic hydrocarbons

✍ Scribed by S.F. Fisher; E.C. Lim

Publisher: Elsevier Science
Year: 1972
Tongue: English
Weight: 483 KB
Volume: 14
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(72)87136-7

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✦ Synopsis

Radiative lifetimes of the lowest triplet states are determined for several aromatic hydrocarbons from the measured fluorescence quantum yield, phosphorescence quantum yield, and lifetime of phosphorescence.

It is found that the radiative lifetime is considerably Iorger for pcrdeuterated naphthalene and phenanthrene than for the corresponding perprotonated species A theoretical explanation is presented wSich involves a new non-Born-Oppenheimer coupling mechanism.

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