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OBSERVATION OF VIBRATIONALLY HOT CH$_{2}$CHO IN THE 351NM PHOTODISSOCIATION OF XCH$_{2}$CH$_{2}$ONO (X=F,Cl,Br,OH)

Please use this identifier to cite or link to this item: http://hdl.handle.net/1811/52255

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Title: OBSERVATION OF VIBRATIONALLY HOT CH$_{2}$CHO IN THE 351NM PHOTODISSOCIATION OF XCH$_{2}$CH$_{2}$ONO (X=F,Cl,Br,OH)
Creators: Chhantyal-Pun, Rabi; Chen, Ming-Wei; Miller, Terry A.
Issue Date: 2012
Abstract: Alkyl nitrites have been used in the past as precursors for producing alkoxy radicals which are important intermediates in combustion and atmospheric chemistry. Substituted alkoxies, particularly hydroxy substituted alkoxy radicals, are important intermediates in the atmospheric chemistry of alkenes. In this talk we will present results obtained from the 351nm photodissociation of XCH$_{2}$CH$_{2}$ONO (X=F,Cl,Br,OH). The resulting photo-fragments were probed by laser induced fluorescence (LIF) technique downstream of a free-jet expansion. We were not able to observe any transitions resulting from the corresponding XCH$_{2}$CH$_{2}$O radicals except for FCH$_{2}$CH$_{2}$ONO. We were able to observe HCHO and also vibrationally hot CH$_{2}$CHO from all the different precursors. In CH$_{2}$CHO, there is a significant excitation in the CC torsion and CCO bend vibrations. There is also some excitation in CC stretching and CH$_{2}$ rock vibrations. HCHO is produced due to dissociation of XCH$_{2}$CH$_{2}$O in the ground state as the CC scission energy is less than the available photon energy.
URI: http://hdl.handle.net/1811/52255
Other Identifiers: 2012-RE-08
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