双(2-乙醇砜基)烷烃三甲基硅基衍生物的质谱规律研究

Study on bis(2-hydroxyethylsulfony)alkane TMS Derivatives by Mass Spectrometry

采用电子电离质谱(EI-MS)研究双(2-乙醇砜基)烷烃三甲基硅基(TMS)衍生物的质谱裂解行为。发现该类化合物的分子离子峰很弱,最大的特征碎片为[M—CH3]+,其次为[M—SO2CH2CH2OSi(CH3)3]+,二者之间未明显呈现其他特征碎片离子。探讨质谱碎片峰的裂解规律,给出该类化合物的质谱裂解特征,为该类化合物的结构确证提供质谱依据。

TMS derivatives of bis（2-hydroxyethylsulfony） alkane were investigated by electron ionization mass spectrometry（EI-MS）. The results show that their molecular ion peaks of all above compounds are weak observed in mass spectra, but the fragment ions [M-CH3 ]^＋ and [M-SO2 CH2 CH20Si（CH3）3 ]^＋ appear with higher abundance ratio. The fragmentation mechanism of the compounds is proposed. The characteristic fragment ion is pointed out to identify the compounds.