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8710465 
Journal Article 
Mechanisms of deactivation of triplet 1-anthrol and 2-naphthol by aromatic n-heterocycles 
Yamamoto, SA; Kikuchi, K; Kokubun, H 
1977 
0 
Journal of Photochemistry
ISSN: 0047-2670
EISSN: 1873-2658 
7 
3 
177-184 
English 
A flash photolytic investigation to determine the efficiency of the hydrogen atom transfer reaction in the triplet state was carried out for the systems of 1-anthrol-quinoline and 2-naphthol-pyridine in cyclohexane. The triplet states of 2-naphthol and 1-anthrol react respectively with pyridine and quinoline at a reaction efficiency of unity. In contrast, the reaction efficiency of the triplet 1-anthrol hydrogen bonded with quinoline is 0.59 and that of the triplet 2-naphthol hydrogen bonded with pyridine is 0.80. The difference in reaction efficiencies between the free and the hydrogen-bonded species implies that the hydrogen atom transfer reaction of the free species does not occur in the hydrogen-bonded triplet state following the encounter state but directly in the encounter state. 1977.