The ultraviolet absorption spectrum of chlorine peroxide (ClOOCl) and implications for polar ozone chemistry

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• Dr Francis Pope (University of Cambridge)
• Monday 26 November 2007, 14:15-15:15
• Unilever Lecture Theatre, Department of Chemistry.

If you have a question about this talk, please contact Christine Braban.

A new experimental determination of the absorption spectrum of chlorine peroxide (ClOOCl),(1) has potentially disproved well-established mechanisms used to describe the formation of ozone holes.(2) The work carried out at NASA ’s Jet Propulsion Laboratory managed to synthesise ClOOCl in yields and purity which were previously unattainable. The recorded spectrum produces a lower ClOOCl photolysis rate, and hence reduces the ozone destruction attributable to ClOOCl. The talk will discuss the experimental aspects, the analytical description of the recorded spectra, and the implications of the findings with regard to ozone chemistry.

(1) Pope F.D. et al. J. Phys. Chem. A, 111, 4322 (2007). (2) Schiermeier Q. Nature, 449 (7161), 382 Sep 27 (2007).

This talk is part of the Centre for Atmospheric Science seminars, Chemistry Dept. series.

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