dc.creator Kline, Neal D. en_US dc.creator Miller, Terry A. en_US dc.creator Coons, Marc en_US dc.creator Herbert, John en_US dc.date.accessioned 2013-07-16T21:36:02Z dc.date.available 2013-07-16T21:36:02Z dc.date.issued 2013 en_US dc.identifier 2013-RI-11 en_US dc.identifier.uri http://hdl.handle.net/1811/55258 dc.description Author Institution: Laser Spectroscopy Facility, Department of Chemistry, The Ohio State University, 120 W. 18th Avenue, Columbus, Ohio 43210; Department of Chemistry, The Ohio State University, Columbus, Ohio 43210 en_US dc.description.abstract It is possible that we have observed for the first time the transition from the ground $^1$A$'$ state to the low lying $^3$A$'$ state of the methylene peroxy Criegee intermediate, CH$_2$O$_2$, which is otherwise known as carbonyl or formaldehyde oxide. Criegee intermediates are reactive intermediates that are formed in the ozonolysis of olefins in both liquid and gaseous phases with the methylene peroxy intermediate being formed specifically from the ozonolysis of ethene. In the atmosphere Criegee intermediates are formed in reactions that lead to secondary organic aerosols and participate in reactions with SO$_2$ and NO$_2$. A peroxy-like spectrum was observed in the near-IR using cavity ringdown spectroscopy after photolysis of a diiodomethane precursor at 248 nm followed by a reaction with O$_2$. Possible assignment of the spectrum to CH$_2$O$_2$ is based on a strong analogy between the electronic structure of methylene peroxy and ozone. However experiments and electronic structure calculations are continuing to positively attribute the spectrum to either CH$_2$O$_2$ or CH$_2$IO$_2$ which could also be formed by this chemistry. en_US dc.language.iso en en_US dc.publisher Ohio State University en_US dc.title POSSIBLE OBSERVATION OF THE $^3$A$^\prime$ - $^1$A$^\prime$ ELECTRONIC TRANSITION OF THE METHYLENE PEROXY CRIEGEE INTERMEDIATE en_US dc.type Article en_US dc.type Image en_US dc.type Presentation en_US
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