Photochemical Properties of Hydrofluoroethers CH3OCHF2, CH3OCF3, and CHF2OCH2CF3: Reactivity toward OH, IR Absorption Cross Sections, Atmospheric Lifetimes and Global Warming Potentials
Vladimir L. Orkin, Victor Khamaganov, A G. Guschin
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.
, Khamaganov, V.
and Guschin, A.
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 December 2, 2023)