DIRECT EVIDENCE OF PHOTODISSOCIATION OF CARBAZOLE VIA THE HIGHER EXCITED TRIPLET STATE BY A DOUBLE EXCITATION METHOD
- 5 October 1977
- journal article
- research article
- Published by Oxford University Press (OUP) in Chemistry Letters
- Vol. 6 (10) , 1173-1176
- https://doi.org/10.1246/cl.1977.1173
Abstract
Photodissociation of carbazole is investigated in cyclohexane at room temperature by a double excitation method which utilizes two successive excitation light pulses; the first flash L1 is used to populate the lowest excited triplet state T1 of carbazole and the second flash L1 to excite T1 into the higher excited triplet state Tn. Selective Tn←T1 excitation of carbazole by L2 brings about both the formation of carbazyl radical and the depletion of T1. Therefore, it is concluded that carbazyl radical is formed via Tn.Keywords
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