Dissociative photoionization of l-menthone: An experimental and theoretical study |
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Authors: | Lei Gong Fuyi Liu Liusi Sheng Zhenya Wang |
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Institution: | a School of Nuclear Science and Technology, National Synchrotron Radiation Laboratory, University of Science and Technology of China, 42 Hezuohua South Road, Hefei, Anhui 230029, PR China b Laboratory of Environmental Spectroscopy, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China |
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Abstract: | The dissociative photoionization mechanism of l-menthone has been investigated with photoionization mass spectrometry using synchrotron radiation. The adiabatic ionization energy (IE) of l-menthone and the appearance energies (AE) of its major fragment ions C9H15O+, C9H17+, C8H16+, C7H11O+, C6H10O+, C6H9O+, C5H8O+, C5H10+, C4H6O+, C5H9+, C4H8+, C4H7+, C3H7+, C3H6+, C2H2O+, and CH3+ are determined with their photoionization efficiency (PIE) spectra in the photon energy region of ∼8−15.5 eV. Breakdown diagrams identifying the major products are presented. Dissociative photoionization channels for formation of these fragment ions are proposed based on comparison of determined experimental appearance energies and energies predicted with the DFT calculations. According to our results, the experimental dissociation energies are in fair agreement with the theoretical values of the possible photodissociation channels of C10H18O. |
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Keywords: | l-Menthone" target="_blank">l-Menthone Dissociative photoionization Synchrotron radiation Photoionization mass spectrometry Quantum chemistry calculation |
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