Back to Search
Start Over
UV absorption spectrum of the C2 Criegee intermediate CH3CHOO.
- Source :
-
Journal of Chemical Physics . 8/21/2014, Vol. 141 Issue 7, p1-7. 7p. - Publication Year :
- 2014
-
Abstract
- The UV spectrum of CH³CHOO was measured by transient absorption in a flow cell at 295 K. The absolute absorption cross sections of CH³CHOO were measured by laser depletion in a molecular beam to be (1.06 ± 0.09) × 10-17 cm² molecule-1 at 308 nm and (9.7 ± 0.6) × 10² molecule-1 at 352 nm. After scaling the UV spectrum of CH³CHOO to the absolute cross section at 308 nm, the peak UV cross section is (1.27 ± 0.11) × 10-17 cm² molecule-1 at 328 nm. Compared to the simplest Criegee intermediate CH2OO, the UV absorption band of CH³CHOO is similar in intensity but blue shifted by 14 nm, resulting in a 20% slower photolysis rate estimated for CH³CHOO in the atmosphere. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00219606
- Volume :
- 141
- Issue :
- 7
- Database :
- Academic Search Index
- Journal :
- Journal of Chemical Physics
- Publication Type :
- Academic Journal
- Accession number :
- 97625156
- Full Text :
- https://doi.org/10.1063/1.4892582