science-softCon uv/vis+ photochemistry database;	www.photochemistry.org; (C) science-softCon 2019

Substance: methyl carbonyl oxide			Other Names: 

Formula: C2H4O2; CH3CHOO				CAS-No.: 

Study: uv absorption spectrum

                
Authors: M.C. Smith, W.-L. Ting, C.-H. Chang, K. Takahashi, K.A. Boering, J. Jr-Min Lin

Title: UV absorption spectrum of the C2 Criegee intermediate CH3CHOO

Journal/Source: J. Chem. Phys., 141, 074302, (2014); http://dx.doi.org/10.1063/1.4892582 


Data: table, diagram

Energy/Wavelength range: 280 - 440 nm

Resolution: 

Temperature: 295 K

Temperature dependence: no

Pressure/Concentration: 

Phase: gas

pH:


Comments: 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) × 10-18 cm2 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.

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