FRAGMENTATION OF THE POPOP MOLECULE BY ELECTRON-IMPACT IONIZATION

被引：5
|
作者：
Romanova, L. G. [1 ]
Zavilopulo, A. N. [1 ]
Shpenik, O. B. [1 ]
Kukhto, A. V. [2 ]
Agafonova, A. S. [1 ]
机构：
[1] Natl Acad Sci Ukraine, Inst Elect Phys, UA-88017 Uzhgorod, Ukraine
[2] Natl Acad Sci Belarus, BI Stepanov Phys Inst, Minsk, BELARUS
来源：
JOURNAL OF APPLIED SPECTROSCOPY | 2008年 / 75卷 / 04期
关键词：
mass spectroscopy; POPOP; electron impact; fragmentation;
D O I：
10.1007/s10812-008-9084-8
中图分类号：
O433 [光谱学];
学科分类号：
0703 ; 070302 ;
摘要：
Single and dissociative ionizations of the POPOP molecule by electron impact in the gas phase are studied using mass spectroscopy. Fragmentation pathways of the molecule are proposed taking into account the common system of conjugated pi-electrons and heteroatoms in the POPOP molecule. The appearance thresholds for certain fragments of the molecule are determined based on experimentally measured ionization cross sections as functions of the ionizing electron energy. An ion with m/z = 144 [C9H6ON](+) that is complementary to a fragment with m/z = 220 [C13H10ON](+) (present in the NIST mass spectrum database) is found for the first time in the mass spectrum of POPOP. Its appearance threshold is determined (E-ap = 9.48 eV).
引用
收藏
页码：506 / 513
页数：8
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