Vuiation of concentration ofCeH6, C6D6, CiHsCH3, and o-CgH+(CH& in metbylcyclohexane ~~e.s a de-ae&ce in the ratio of phosphorescence to fluorescence yields and also the phosphorescence decay times at 77 K. The detection of delayed fluorescence shows that triplet-triplet annihilation czn explain the
Deuteration effects on the phosphorescence of aromatic hydrocarbons
β Scribed by J.B. Birks; T.D.S. Hamilton; J. Najbar
- Publisher
- Elsevier Science
- Year
- 1976
- Tongue
- English
- Weight
- 363 KB
- Volume
- 39
- Category
- Article
- ISSN
- 0009-2614
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β¦ Synopsis
bbservations of the phosphorescence decay of isotopic mixtures of naphthalene-ha and d &hD p enanthrene-h 10 and -dlo, and chrysene-h Iz and d12, in ethanol solutions at 77 K are anaIyscd to determine !he ratio .k~/k~ of the tripIet radiative rate parameters of the perprotonated and perdeuterated compounds. The ratio is 1.20 (eO.07) for naphthalene, 1.39 00.06) for phenanthrene, and 0.98 (kO.04) for chrysene.
π SIMILAR VOLUMES
Phosphorescence from pyrene and naphthalene in the vapour phase has been obsrved. The lifetime and quantum yields are studied between 0.04 and 10 torr.
Phosphorescence lifetimes measured for C6K5CCH. C6H5CCD, C6D$CH, and C6D5CCD in rigid glasses at 77% show that deuterium substitution for the single acetylenic hydrogen has almost the same effect as deuterium substitution for all five phenyl ring hydrogens in altering the radiationless deactivation
The phosphorescence spectra of several simple arenes, pyrene, naphthahne, biphenyl and their bfiminated derivatives have been observed in aqueous micellar solutions at room temperature. The success of these experiments is due to the protective screening of the arene triplet state by solubilization i