کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5397194 | 1505776 | 2007 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Ionic yield and dissociation pathways from soft X-ray double-ionization of alcohols
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Ionic yield and dissociation pathways from soft X-ray double-ionization of alcohols Ionic yield and dissociation pathways from soft X-ray double-ionization of alcohols](/preview/png/5397194.png)
چکیده انگلیسی
We present data from inner shell excitation and double-ionization of alcohols of interstellar interest, methanol and ethanol at energies around C 1s edge. The measurements were taken at the Brazilian Synchrotron Light Laboratory (LNLS), employing soft X-ray photons (100-310Â eV) from a toroidal grating monochromator (TGM) beamline. The experimental set up consists of a high vacuum chamber with a time-of-flight mass spectrometer TOF-MS. Mass spectra were obtained using coincidence techniques. Mean kinetic energies, abundances and dissociation pathways for each ionic pair in coincidence have been obtained from the analysis of the corresponding peak shapes and slopes observed in photoelectron photoion photoion (PE2PICO) coincidence mass spectra. The main dissociation channels of double ionized methanol were associated to the ions pairs H+Â +Â COH+, H+Â +Â CO+, H+Â +Â CH2+ and H+Â +Â CH+. In the case of double ionized ethanol, the main dissociation channels were associated to the ions pairs CH3+Â +Â COH+, H+Â +Â COH+, H+Â +Â CH2+ and H+Â +Â C2H2+. About 40% and 25% of the dissociation channels of doubly ionized methanol and ethanol, respectively, lead to the production of reactant COH+ ion, important for the formation of other organic molecules.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Electron Spectroscopy and Related Phenomena - Volume 155, Issues 1â3, March 2007, Pages 70-76
Journal: Journal of Electron Spectroscopy and Related Phenomena - Volume 155, Issues 1â3, March 2007, Pages 70-76
نویسندگان
S. Pilling, H.M. Boechat-Roberty, A.C.F. Santos, G.G.B. de Souza,