DEHYDROGENATION IN ELECTRON-INDUCED DISSOCIATIVE IONIZATION OF PYRIDINE MOLECULE

被引：0
|
作者：
Jurkowski, Michal K. [1 ]
Wasowicz, Tomasz J. [1 ]
机构：
[1] Gdansk Univ Technol, Inst Phys & Comp Sci, Div Complex Syst Spect, Ul G Narutowicza 11-12, PL-80233 Gdansk, Poland
来源：
ROMANIAN JOURNAL OF PHYSICS | 2023年 / 68卷 / 7-8期
关键词：
Pyridine; shake-off dehydrogenation; ThreSpect; cross-section; thresholds; dissociation; ionization; mass spectra; electrons; INCIDENT ENERGY-RANGE; APPEARANCE ENERGIES; HYDROGEN MIGRATION; KINETIC SHIFT; FRAGMENTATION; IMPACT; PHOTOIONIZATION; PYRIMIDINE; PYRAZINE;
D O I：
暂无
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The electron-impact dissociative ionization of pyridine has been investigated using mass spectrometry. Thirty-two well-resolved mass peaks have been identified in the cation mass spectra and assigned to the most likely ionic molecular fragments. The new sixteen ionic fragments' appearance energies have been determined, and sixteen others remeasured. The total cross-section for electron-impact ionization of pyridine has been measured at 100 eV. Thorough analysis indicates that at least three peaks' groups in the mass spectra occur via the shake-off dehydrogenation mechanism, i.e., by sequential hydrogen atoms elimination from the pyridine parent cation or its fragmentation products. The nature of this process is deciphered.
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页数：10
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