Muftakhov Mars V, Khatymov Rustem V, Shchukin Pavel V, Pogulay Andrey V, Mazunov Victor A
Institute of Molecular and Crystal Physics, Ufa Research Center, Russian Academy of Sciences, Prospekt Oktyabrya, 151, 450075 Ufa, Russia.
J Mass Spectrom. 2010 Jan;45(1):82-8. doi: 10.1002/jms.1693.
The reactions of resonant electron capture by the molecules of benzene nitroderivatives has been studied in the gas phase. Some fragment negative ions were found to be unstable with respect to electron autodetachment. This circumstance has been used for the determination of their structure. In particular, it has been established that the low measured appearance energy of neutral component of M-H ion beam is a result of isomerization of nitrobenzenes' molecular ion, leading to the 2-nitrosophenol structure with the subsequent formation of the phenoxide anion in the autodetaching state. The effective yield curves of some types of fragment ions demonstrate fine vibrational structures, testifying the predissociation mechanism of ion formation. For all detected ions, the absolute cross sections of formation have been measured.
在气相中研究了苯硝基衍生物分子的共振电子俘获反应。发现一些碎片负离子相对于电子自脱附是不稳定的。这一情况已被用于确定它们的结构。特别是，已经确定M-H离子束中性组分的低测量出现能是硝基苯分子离子异构化的结果，导致形成2-亚硝基苯酚结构，随后在自脱附状态下形成酚盐阴离子。某些类型碎片离子的有效产率曲线显示出精细的振动结构，证明了离子形成的预解离机制。对于所有检测到的离子，都测量了其形成的绝对截面。
