Kinetics and yields of OH radical from the CH 3OCH 2 + O 2 reaction using a new photolytic source

• Published in: Chemical physics letters Vol. 487; no. 1; pp. 45 - 50
• Main Authors: Eskola, A.J., Carr, S.A., Blitz, M.A., Pilling, M.J., Seakins, P.W.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 2010
• ISSN: 0009-2614; 1873-4448
• DOI: 10.1016/j.cplett.2010.01.025

Chemical scheme and experimental results for OH formation from CH 3OCH 2 + O 2 as a function of pressure. The methoxymethyl radical, CH 3OCH 2, formed from the photodissociation of CH 3OCH 2Br at 248 nm, was observed to form OH on reaction with O 2. The kinetics of OH formation were measured as a function of pressure at 295 K using this new photolytic methoxymethyl radical precursor, detecting OH by LIF, giving rate coefficients in good agreement with the literature values for CH 3OCH 2 + O 2 (R2). This reaction proceeds via the formation of an energised CH 3OCH 2O 2 adduct, which either dissociates to OH + 2H 2CO or is collisionally stabilised. To quantify OH production from the CH 3OCH 2 + O 2 reaction, both relative and absolute OH yield measurements were performed as a function of pressure.