PHOTOPHYSICAL TRIPLET-STATE PROCESSES OF 4-H-1-BENZOPYRANE-4-THIONE IN A PERFLUOROALKANE .2. DELAYED S-2-]S-0 FLUORESCENCE DUE TO TRIPLET-TRIPLET ANNIHILATION

Authors
EISENBERGER H NICKEL B RUTH AA STEER RP
Citation
H. Eisenberger et al., PHOTOPHYSICAL TRIPLET-STATE PROCESSES OF 4-H-1-BENZOPYRANE-4-THIONE IN A PERFLUOROALKANE .2. DELAYED S-2-]S-0 FLUORESCENCE DUE TO TRIPLET-TRIPLET ANNIHILATION, Journal of the Chemical Society. Faraday transactions, 92(5), 1996, pp. 741-746
Citations number
21
Categorie Soggetti
Chemistry Physical","Physics, Atomic, Molecular & Chemical
Journal title
Journal of the Chemical Society. Faraday transactions → ACNP
ISSN journal
09565000
Volume
92
Issue
5
Year of publication
1996
Pages
741 - 746
Database
ISI
SICI code
0956-5000(1996)92:5<741:PTPO4I>2.0.ZU;2-V
Abstract
With 4-H-1-benzopyrane-4-thione (BPT) in perfluoro-1,3-dimethylcyclohe xane a delayed monomer fluorescence S-2 --> S-0 due to triplet-triplet annihilation (TTA) is observable. The probability of generating an S- 2 state by the annihilation of two triplet states is ca. 0.03. The gen eration of S-2 by TTA can be interpreted as a special case of Forster energy transfer. There is no indication of a delayed fluorescence from an upper excimer state.