摘要
利用同步辐射光和反射飞行时间质谱,研究了丙烯酸甲酯9.0～15.5eV能量范围的真空紫外光电离和光解离.实验测量丙烯酸甲酯的光电离质谱和解离碎片离子m/e =86(C4H6O2+),85(C4H5O2+),59(C2H3O2+),58(C3H6O+) ,55(C3H3O+),42(C3H6+),31(CH3O+),27(C2H3+),和15(CH3+)的光电离效率曲线.并利用量子化学从头算(G3),计算碎片离子的能级,推测它们的解离通道.计算的电离能和出现势与实验结果符合很好.结果表明,丙烯酸甲酯的光电离解离通道以单键断裂反应为主.
The vacuum uhraviolet （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（C4H6O2^＋）,85（C4H5O2^＋）,59（C2H3O2^＋）,58（C3H6O^＋）,55（C3H3O^＋）,42（C3H6^＋）,31（CH3O^＋）,27（C2H3^＋）,and 15（CH3^＋） from methyl acrylate have been measured. In addition, the energeties 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
出处
《中国科学院研究生院学报》
CAS
CSCD
北大核心
2009年第6期749-758,共10页
Journal of the Graduate School of the Chinese Academy of Sciences
基金
supported by National Natural Science Foundation of China (10875126,10675112)
SRF for ROCS,SEM
关键词
丙烯酸甲酯
真空紫外光电离
同步辐射
离解通道
methyl acrylate, VUV photoionization, synchrotron radiation, dissociation channels
作者简介
corresponding authors, E-mail： fyliu @ ustc. edu. cn,
corresponding authors, E-mail： lssheng @ ustc. edu. cn
