A vacuum ultraviolet photoionization mass spectrometric study of acetone.
The photoionization and dissociative photoionization of acetone have been studied at the photon energy range of 8-20 eV. Photoionization efficiency spectra for ions CH3COCH3+, CH3+, C2H3+, C3H3+, C3H5+, CH(2-)CO+, CH3CO+, C3H4O+, and CH3COCH2+ have been measured. In addition, the energetics of the dissociative photoionization has been examined by ab initio Gaussian-3 (G3) calculations. The computational results are useful in establishing the dissociation channels near the ionization thresholds. With the help of G3 results, the dissociation channels for the formation of the fragment ions CH3CO+, CH2CO+, CH3+, C3H3+, and CH3COCH2+ have been established. The G3 results are in fair to excellent agreement with the experimental data.
Wei
Lixia
L
National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, P. R. China.
Yang
Bin
B
Yang
Rui
R
Huang
Chaoqun
C
Wang
Jing
J
Shan
Xiaobin
X
Sheng
Liusi
L
Zhang
Yunwu
Y
Qi
Fei
F
Lam
Chow-Shing
CS
Li
Wai-Kee
WK