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611467 
Journal Article 
Absorption cross section determination of biogenic C 5-aldehydes in the actinic region 
Lanza, B; Jiménez, E; Ballesteros, B; Albaladejo, J 
2008 
Yes 
Chemical Physics Letters
ISSN: 0009-2614 
454 
4-6 
184-189 
WOS:000254425200008 
UV absorption cross sections (sigma(lambda)) for 3 methylbutanal, trans-2-methyl-2-butenal, and 3-methyl-2-butenal have been determined between 255
and 390 nm and as a function of temperature (273-305 K). A D-2 lamp and a 0.5 m spectrograph
coupled to a charged-couple device were employed in these measurements. sigma(lambda) values were
found to be independent of temperature in the range studied. The cross section data reported in
this Letter were used to provide estimates of the photolysis rate coefficients (J(i)) for these
compounds as a function of altitude in the troposphere. Photolysis and OH reaction both appear to
be important in determining the atmospheric fate of these compounds. (c) 2008 Published by
Elsevier B. V. 
ABSORPTION cross sections; ALDEHYDES; ACTIN; PHOTOCHEMISTRY