A vacuum ultraviolet photoionization mass spectrometric study of acetone |
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| Authors: | Wei Lixia Yang Bin Yang Rui Huang Chaoqun Wang Jing Shan Xiaobin Sheng Liusi Zhang Yunwu Qi Fei Lam Chow-Shing Li Wai-Kee |
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| Institution: | National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, P. R. China. |
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| Abstract: | 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. |
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