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dc.creatorKline, Neal D.en_US
dc.creatorMiller, Terry A.en_US
dc.creatorCoons, Marcen_US
dc.creatorHerbert, Johnen_US
dc.date.accessioned2013-07-16T21:36:02Z
dc.date.available2013-07-16T21:36:02Z
dc.date.issued2013en_US
dc.identifier2013-RI-11en_US
dc.identifier.urihttp://hdl.handle.net/1811/55258
dc.descriptionAuthor 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 43210en_US
dc.description.abstractIt 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.isoenen_US
dc.publisherOhio State Universityen_US
dc.titlePOSSIBLE OBSERVATION OF THE $^3$A$^\prime$ - $^1$A$^\prime$ ELECTRONIC TRANSITION OF THE METHYLENE PEROXY CRIEGEE INTERMEDIATEen_US
dc.typeArticleen_US
dc.typeImageen_US
dc.typePresentationen_US


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