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1
ꢀ
reactive species such as OH or O2. Furthermore, formation
of dihydroxybiphenyls and phenoxyphenols can potentially be
the first steps of an oligomerisation process, similar to the
reactions that yield the humic-like substances in the
atmosphere.49,50
Photoexcited quinones can oxidise nitrite to nitrogen
dioxide, which enhances phenol nitration compared to the
irradiation of nitrite alone. Such a process could lead to
significant generation of phytotoxic nitrophenols in the
atmospheric aqueous phase, which could contribute to vegetation
damage. Because of the potential importance of quinone-
enhanced nitration, further investigation will be required to
assess its significance in the atmospheric aerosol phase.
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Acknowledgements
Financial support from PNRA-Progetto Antartide is gratefully
acknowledged. We are thankful to Prof. Eliano Diana for
useful discussion.
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