Welcome to Journal of University of Chinese Academy of Sciences,Today is

›› 2009, Vol. 26 ›› Issue (6): 749-758.DOI: 10.7523/j.issn.2095-6134.2009.6.004

• Research Articles • Previous Articles     Next Articles

Vacuum ultraviolet photoionization mass spectrometric study of methyl acrylate

DU Qi, SHAN Xiao-Bin, LIU Fu-Yi, HAN Ju-Guang, SHENG Liu-Si   

  1. National Synchrotron Radiation Laboratory and School of Nuclear Science and Technology, University of Science and Technology of China, Hefei 230029, China
  • Received:2009-05-06 Revised:2009-05-18 Online:2009-11-15
  • Supported by:

    supported by National Natural Science Foundation of China (10875126, 10675112), and SRF for ROCS, SEM corresponding authors

Abstract:

The vacuum ultraviolet (VUV) photoionization and dissociative photoionization of methyl acrylate have been studied at the photon energy range of 9.0~15.5 eV by using synchrotron radiation and a reflection time-of-flight mass spectrometer (TOF-MS). The photoionization mass spectra and photoionization efficiency (PIE) curves for fragment ions m/e=86(C4H6O+2), 85(C4H5O+2), 59(C2H3O+2), 58(C3H6O+), 55(C3H3O+), 42(C3H+6), 31(CH3O+), 27(C2H+3), and 15(CH+3) from methyl acrylate have been measured. In addition, the energetics of the dissociative photoionization species have been calculated using ab initio Gaussian-3 (G3) programs. The calculated ionization energies (IEs) and appearance energies (AEs) are in good agreement with the experimental data. Moreover, the main dissociative photoionization channels, simple bond cleavage reactions, are proposed.

Key words: methyl acrylate, VUV photoionization, synchrotron radiation, dissociation channels

CLC Number: