The Photoreduction of 2-Nitronaphthalene in 2-Propanol

Abstract
The photoreduction of 2-nitronaphthalene in 2-propanol has been studied at 313 nm. The photoreduction is suppressed in the presence of dissolved oxygen or a triplet quencher such as 1,3-cyclohexadiene. The results are consistent with the triplet state of 2-nitronaphthalene being the reactive species. 2-Naphthylhydroxylamine is formed as the reaction product. The quantum yield for the disappearance of 2-nitronaphthalene is estimated to be 0.037. The low quantum yield results from the slow reaction rate of hydrogen abstraction by the ππ* triplet state of 2-nitronaphthalene.

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