Absolute cross-sections for dissociative photoionization of some small esters

Wang, Juan; Yang, Bin; Cool, Terrill A.; Hansen, Nils

doi:10.1016/j.ijms.2010.02.010

Absolute cross-sections for dissociative photoionization of some small esters

Journal Article · Sat May 01 00:00:00 EDT 2010 · International Journal of Mass Spectrometry

DOI:https://doi.org/10.1016/j.ijms.2010.02.010· OSTI ID:1060499

Wang, Juan ^[1]; Yang, Bin; Cool, Terrill A.; Hansen, Nils

Combustion Research Facility, Sandia National Laboratories, Livermore, CA 94551

The first measurements of absolute cross-sections for near-threshold molecular and dissociative photoionization are presented for 11 small esters (methyl formate, ethyl formate, vinyl acetate, methyl propanoate, ethyl propanoate, methyl butanoate, methyl isobutanoate, methyl propenoate, ethyl propenoate, methyl crotonate, and methyl methacrylate). Photoionization mass spectrometry (PIMS) is employed with an energy resolution of 40 meV (fwhm) using a monochromated VUV synchrotron light source. An extensive literature exploring isomerization/dissociation mechanisms is available for six of these molecules. There are, however, no previous observations of dissociative ionization for four simple monounsaturated esters (methyl propenoate, ethyl propenoate, methyl crotonate, and methyl methacrylate), and dissociative ionization of ethyl propanoate has received scant attention. Appearance energies for dissociative photofragment ions of these five molecules are presented.

Research Organization:: Cornell Univ., Ithaca, NY (United States)

Sponsoring Organization:: USDOE

DOE Contract Number:: FG02-01ER15180

OSTI ID:: 1060499

Report Number(s):: DOE-ER15180-7

Journal Information:: International Journal of Mass Spectrometry, Journal Name: International Journal of Mass Spectrometry Journal Issue: 1-3 Vol. 292; ISSN 1387-3806

Publisher:: Elsevier

Country of Publication:: United States

Language:: English

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Absolute cross-sections for dissociative photoionization of some small esters

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