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

Substance: glycolaldehyde				Other Names: acetaldehyde, hydroxy-

Formula: C2H4O2						CAS-No.: 141-46-8

Study: uv absorption cross section, photolysis, quantum yields


Authors: R. Karunanandan, D. Hölscher, T.J. Dillon, A. Horowitz, J.N. Crowley, L. Vereecken, J. Peeters

Title: Reaction of HO with Glycolaldehyde, HOCH2CHO: Rate Coefficients (240-362 K) and Mechanism

Journal/Source: J. Phys. Chem. A, 111 (5), 897-908, (2007); DOI: 10.1021/jp0649504


Data: diagram, table

Energy/Wavelength range: 184.9 nm; 205 - 335 nm

Resolution: 

Temperature: 298 K

Temperature dependence: no

Pressure/Concentration: 0.0805 - 0.355 Torr

Phase: gas

pH:


Comments: The absorption cross-section of HOCH2CHO at 184.9 nm was determined to be (3.85 ± 0.2) x 10-18 cm2 molecule-1, 
and the quantum yield of HO formation from the photolysis of HOCH2CHO at 248 nm was found to be (7.0 ± 1.5) × 10-2. 
In addition the absorption spectrum was measured between ~ 210 and 335 nm. At 282 nm, close to the maximum absorption, an unweighted, 
least-squares fit of the data at this wavelength yields a cross-section of (6.94 ± 0.10) x 10-20 cm2 molecule-1.

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