UV absorption cross-sections of a series of dimethylbenzaldehydes.

Abstract : The ultraviolet absorption cross-sections of 2,4-, 2,5-, 2,6-, 3,4- and 3,5- dimethylbenzaldehydes are reported in the wavelength range 240-320 nm. The measurements were carried out in the temperature range 318-363 K using two different experimental systems (D 2 lamp-monochromator and D 2 lamp-diode array). The absorption spectra of the five aldehydes have been found to exhibit relatively high absorption cross-sections in the region of the tropospheric interest with maxima around 290 nm. This work provides the first UV cross-section measurements for these aromatic aldehydes. The obtained cross-section values enable us to estimate the tropospheric photolysis lifetimes of these compounds. The results suggest that photolysis could be an important removal process for these species in the troposphere.
Document type :
Journal articles
Complete list of metadatas

https://hal.archives-ouvertes.fr/hal-00671953
Contributor : Dorothée Destouches <>
Submitted on : Monday, February 20, 2012 - 9:55:35 AM
Last modification on : Wednesday, March 20, 2019 - 1:20:18 AM

Links full text

Identifiers

Citation

Gisèle El Dib, Abdelkhaleq Chakir, Abdelwahid Mellouki. UV absorption cross-sections of a series of dimethylbenzaldehydes.. Journal of Physical Chemistry A, American Chemical Society, 2008, 112 (37), pp.8731-6. ⟨10.1021/jp803874e⟩. ⟨hal-00671953⟩

Share

Metrics

Record views

145