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Extremely fast radiationless transition from the triplet state of 9,10-diazaphenanthrene

โœ Scribed by Masahide Terazima

Book ID
103026673
Publisher
Elsevier Science
Year
1987
Tongue
English
Weight
479 KB
Volume
140
Category
Article
ISSN
0009-2614

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โœฆ Synopsis

The decay of the lowest excited triplet state of 9,10-diazaphenanthrene (DAP) was investigated. A surprisingly high sublevel decay rate ( kv= 3.3 X 10' s-' ) in biphenyl and fluorene hosts was found at 3.0 K from the decay of a time-resolved EPR (TREPR) signal. This high decay rate was confirmed by a lifetime measurement of the delayed fluorescence using a picosecond laser and photon counting system. The nature of the fast radiationless transition is discussed.

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โœ W. Drews; R. Schmidt; H.-D. Brauer ๐Ÿ“‚ Article ๐Ÿ“… 1983 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 420 KB

in tinal form 9 July 1983 hleasurumcnts of the quxttum yield for photoperoxidation of 9,10dipl~enylantl~racene as a function of dissolved oxygen concentration in 101ucne at 20ยฐC. are consistent with gcncration of '02 from both the lowest singet and triplet states of the hydrocarbon.