Exciplex laser photolysis study of acetone with relevance to tropospheric chemistry

The photolysis quantum yield of acetone at 308 nm displays complex temperature- and pressure-dependence in accordance with recent publications. Exciplex laser photolysis at 248 and 308 nm wavelengths coupled with gas-chromatographic analysis was applied to determine the photodissociation quantum yie...

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Bibliographic Details
Published in:Chemical physics letters 2007-05, Vol.440 (1), p.31-35
Main Authors: Nádasdi, Rebeka, Kovács, Gergely, Szilágyi, István, Demeter, Attila, Dóbé, Sándor, Bérces, Tibor, Márta, Ferenc
Format: Article
Language:English
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Summary:The photolysis quantum yield of acetone at 308 nm displays complex temperature- and pressure-dependence in accordance with recent publications. Exciplex laser photolysis at 248 and 308 nm wavelengths coupled with gas-chromatographic analysis was applied to determine the photodissociation quantum yield of acetone (QY). At 308 nm, QY has been found to decrease with decreasing temperature ( T = 323–233 K) and to decrease with increasing pressure ( P = 13–998 mbar synthetic air) supporting the recent suggestion that the photolysis of acetone plays a less important role in the chemistry of the upper troposphere than previously thought. Water vapour has no effect on QY in disagreement with a recent publication.
ISSN:0009-2614
1873-4448
DOI:10.1016/j.cplett.2007.04.014