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以同步辐射为光源,用光电离质谱和符合技术对对硝基苯乙醚分子进行了真空紫外光电离与光离解研究。测得了这一分子的电离势及C6H5NO+3、C6H5O+2、C6H5O+等六个主要碎片离子的出现势,根据实验所得的质谱图、能量关系,结合该分子的具体结构,初步分析了该分子同步辐射光离解电离的可能通道,并得到了分子离子的键离解能D0(O2NC6H4C2H+5)。
Using synchrotron radiation as light source, the study of vacuum ultraviolet photoionization and photodissociation of p - nitro phenetole was carried out by photoionization mass spectrometry and coincidence technique. The ionization potentials of these molecules and the appearance potentials of six major fragment ions such as C6H5NO + 3, C6H5O + 2 and C6H5O + were measured. Based on the experimental mass spectra and energy relationships, the molecular structure of the molecule was analyzed. Synchrotron radiation can dissociate the possible channels of ionization and get the bond dissociation energy D0 (O2NC6H4C2H + 5) of molecular ions.