SF5CF3: the atmospheric properties of this ultimate greenhouse gas

Richard Tuckett

Research output: Book/ReportCommissioned report

59 Downloads (Pure)


One molecule of SF5CF3, an adduct of the SF5 and CF3 free radicals, causes more global warming than one molecule of any other greenhouse gas. Using coincidence spectroscopy at the Daresbury SRS, we have determined the strength of the SC bond to be as large as 3.86  0.45 eV or 372  43 kJ mol-1 . This molecule is therefore very unlikely to be removed from the earth’s atmosphere by UV photolysis in the stratosphere. Complementary experiments at Birmingham and Super-Aco, Paris have shown that the main sink route of this greenhouse pollutant is low-energy electron attachment in the mesosphere, with Lyman- photodissociation at 121.6 nm only being a minor channel. By comparison with data for SF6, the lifetime of SF5CF3 in the earth’s atmosphere is estimated to be ca. 1000 years. 
Original languageEnglish
PublisherGovernment Research Council
Number of pages5
Publication statusPublished - 1 Jan 2004

Bibliographical note

Synchrotron Radiation Department of CCLRC, Annual Report 2004


Dive into the research topics of 'SF5CF3: the atmospheric properties of this ultimate greenhouse gas'. Together they form a unique fingerprint.

Cite this