Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Photochemical Properties of Hydrofluoroethers CH3OCHF2, CH3OCF3, and CHF2OCH2CF3: Reactivity toward OH, IR Absorption Cross Sections, Atmospheric Lifetimes and Global Warming Potentials

Published

Author(s)

Vladimir L. Orkin, Victor Khamaganov, A G. Guschin

Abstract

Rate constants for the gas phase reactions of OH radicals with three partially fluorinated ethers, CH3OCF3 (kHFE-143a), CH3OCHF2 (kHFE-152a), and CHF2OCH2CF3 (kHFE-245fa), were measured using a discharge flow – electron paramagnetic resonance technique over the temperature range 298 K to 460 K. The temperature dependences of the rate constants can be represented by the following. cm3 molecule-1 s-1; cm3 molecule-1 s-1; cm3 molecule-1 s-1. The atmospheric lifetimes due to reactions with tropospheric OH were estimated to be 5.1, 1.8, and 5.4 years respectively. The IR absorption cross-sections of the three fluorinated ethers were measured between 400 cm 1 and 2000 cm-1 and their global warming potentials were estimated.
Citation
Atmospheric Environment

Keywords

hydroxyl, fluorinated ether, atmospheric lifetime, IR spectra, global warming potential

Citation

Orkin, V. , Khamaganov, V. and Guschin, A. (2014), Photochemical Properties of Hydrofluoroethers CH3OCHF2, CH3OCF3, and CHF2OCH2CF3: Reactivity toward OH, IR Absorption Cross Sections, Atmospheric Lifetimes and Global Warming Potentials, Atmospheric Environment, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=909717 (Accessed June 12, 2024)

Issues

If you have any questions about this publication or are having problems accessing it, please contact reflib@nist.gov.

Created September 22, 2014, Updated March 17, 2017