EPR of triplet excitions in tetracene crystals: spin polarization and the role of singlet exciton fission
β Scribed by L. Yarmus; J. Rosenthal; M. Chopp
- Publisher
- Elsevier Science
- Year
- 1972
- Tongue
- English
- Weight
- 574 KB
- Volume
- 16
- Category
- Article
- ISSN
- 0009-2614
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π SIMILAR VOLUMES
The. lifetime T of a correlated pair of triplet excitons has been determined from the linewidth of the RYDMR spectrum. Tbe value r = 7 X lO+ s obtained has been used to cak&te the rate constants of the singlet exciton fsion into a pair of triplet excitons in a tetracene single crystal. The fission w
The photoexcitcd triplet states of chlorophyll a and b are studied by the EPR method at -85 K using modulated ii&t excitation. Both compounds show anomalous EPR line intensities and transient kinetics, indicating e!ectron spin polxi~ation (ESP) in the photoexcitcd triplet state. EPR studies, using h
Photoionization and optical absorption of singlet excitons in a t-stilbene crystal have been studied. The ionization effkiency of the singlet exciton is a constant over the energy range of 5.4-6.5 eV. This is another example indicating that autoionization after a rapid relaxation is a common behavio