Solid-state tmnsitions in crystalline tetmcene h%e been investigated b\ Raman spectroscopy and b> anisotropy of the effect of ZI magetic field on its prompt fluorescence. Discontinuous changes in the temperature dependence of Ramrtn lattice modes nnd new phonon lines occur nezu 182 zmd 144 K, signif
Bimolecular radiationless transitions in crystalline tetracene
โ Scribed by C.E. Swenberg; W.T. Stacy
- Publisher
- Elsevier Science
- Year
- 1968
- Tongue
- English
- Weight
- 190 KB
- Volume
- 2
- Category
- Article
- ISSN
- 0009-2614
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โฆ Synopsis
Bimolecular
decay of an excited singlet exciton into two triplet excitons is suggested to be an imporchannel in crystailinc tetracene and its corresponding rate is estimated to orocess is tentatively proposed to account for the observed reJ.ative fluorescence efficiencies of anthracene, tetracene and pentacene.
๐ SIMILAR VOLUMES
It is shown that the fluorescence and intorsystem crossing in monocyclic diazines originate from the second excited singlet state (S$. The occurrence of these phenomena is justified on the basis of the slow S, -E+ internal conversion resulting from the low density of states.