title: Vacuum ultraviolet photoionization mass spectrometric study of ethylenediamine.
abstract: The photoionization and dissociative photoionizations of ethylenediamine have been studied both experimentally and theoretically. In experiments, photoionization efficiency spectra for ions NH(2)CHCH(3)(+), NH(2)CH=CH(2)(+), CH(2)NH(2)(+), NH(3)(+), NH(2)CH(2)CHNH(2)(+) and NH(2)CH(2)CH(2)NH(2)(+) have been obtained. In addition, the energetics of the dissociative photoionization is investigated with ab initio Gaussian-3 (G3) calculations. The computational results are useful in analyzing the dissociation channels near the ionization thresholds. With the help of the G3 results, the dissociation channels for the formation of the aforementioned fragment ions have been established.
authors.affiliation: National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, P. R. China.
authors.forename: Lixia
authors.initials: L
authors.lastname: Wei
authors.forename: Bin
authors.initials: B
authors.lastname: Yang
authors.forename: Jing
authors.initials: J
authors.lastname: Wang
authors.forename: Chaoqun
authors.initials: C
authors.lastname: Huang
authors.forename: Liusi
authors.initials: L
authors.lastname: Sheng
authors.forename: Yunwu
authors.initials: Y
authors.lastname: Zhang
authors.forename: Fei
authors.initials: F
authors.lastname: Qi
authors.forename: Chow-Shing
authors.initials: CS
authors.lastname: Lam
authors.forename: Wai-Kee
authors.initials: WK
authors.lastname: Li