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. Author to whom correspondence should be addressed: (e-mail address):