(2 + 2) Resonance-enhanced multiphoton ionization-fragmentation study of dimethylamine
Wei Jie; Fang Li; Zhang Bing; Guo Wen-yue; Zhang Lian-di; Zhang Shu-dong; Cai Ji-ye; Wei Jie; Laser Spectroscopy Laboratory, Anhui Institute of Optics and Fine Mechanics, Academia Sinica, Heifei 230031, China; Fang Li; Laser Spectroscopy Laboratory, Anhui Institute of Optics and Fine Mechanics, Academia Sinica, Heifei 230031, China; Zhang Bing; Laser Spectroscopy Laboratory, Anhui Institute of Optics and Fine Mechanics, Academia Sinica, Heifei 230031, China; Guo Wen-yue; Laser Spectroscopy Laboratory, Anhui Institute of Optics and Fine Mechanics, Academia Sinica, Heifei 230031, China; Zhang Lian-di; Laser Spectroscopy Laboratory, Anhui Institute of Optics and Fine Mechanics, Academia Sinica, Heifei 230031, China; Zhang Shu-dong; Laser Spectroscopy Laboratory, Anhui Institute of Optics and Fine Mechanics, Academia Sinica, Heifei 230031, China; Cai Ji-ye; Laser Spectroscopy Laboratory, Anhui Institute of Optics and Fine Mechanics, Academia Sinica, Heifei 230031, China
Журнал:
Acta Physica Sinica (Overseas Edition)
Дата:
1997-10-01
Аннотация:
The multiphoton ionization spectra of dimethylamine are given in the 445-470 nm region. A time-of-flight mass spectrometer was used, and experiment was done under collision free condition. It is found that (2 + 2) resonance-enhanced multiphoton ionization through (n<sub>N</sub>, 3<sub>s</sub>) Rydberg state produces parent ions which endure pseudo-α and C–N bond cleavages. The former forms CH<sub>3</sub>N<sup>+</sup>H = CH<sub>2</sub> ions, and the latter gives CH<sub>2</sub>=N<sup>+</sup>H<sub>2</sub> ions.
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