Pressure-Dependent Kinetics of the Reaction between CH3O2 and OH: TRIOX Formation

Chao Yan, Lev N. Krasnoperov

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


Reaction of methyl peroxy radicals with hydroxyl radicals (1) was studied using pulsed laser photolysis coupled to transient UV-vis absorption spectroscopy at 296 K over the 1-100 bar pressure range (bath gas He): CH3O2 + OH → CH3O + HO2 (1a), CH3O2 + OH → CH2OO + H2O (1b), and CH3O2 + OH → CH3OOOH (TRIOX) (1d). Channel 1a is the dominant channel under ambient conditions, while the contribution of channel 1b is less than 5% at 1 bar and 296 K. Channel 1c is strongly pressure-dependent and becomes dominant at high pressures. The measured branching ratio of channel 1c is α1c = 0.87 ± 0.20 at 100 bar and 296 K. The chain termination channel 1c forming important product TRIOX is experimentally evaluated over an extended pressure range (1-100 bar) for the first time. The stabilization channel 1c might play a role at ambient pressures and low temperatures as well as high pressures at ambient and elevated temperatures.

Original languageEnglish (US)
Pages (from-to)8349-8357
Number of pages9
JournalJournal of Physical Chemistry A
Issue number39
StatePublished - Oct 3 2019

All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry


Dive into the research topics of 'Pressure-Dependent Kinetics of the Reaction between CH3O2 and OH: TRIOX Formation'. Together they form a unique fingerprint.

Cite this