我们建立的反应质谱法(Reaction Mass Spectrometry,RMS)用于天然有机化合物立体化学分析是将立体选择反应试剂引入质谱仪离子源或碰撞室,使样品与试剂发生原位(in Situ)分子—离子反应产生特征离子,由这些离子的丰度提供样品立体结构信...我们建立的反应质谱法(Reaction Mass Spectrometry,RMS)用于天然有机化合物立体化学分析是将立体选择反应试剂引入质谱仪离子源或碰撞室,使样品与试剂发生原位(in Situ)分子—离子反应产生特征离子,由这些离子的丰度提供样品立体结构信息,RMS为快速超微量立体化学分析提供了一种新手段。展开更多
Mass spectrometry has been applied to the study of radicals for many years. These efforts mainly involve the determination of ionization, appearance energies of radicals and the study of radical-molecule reactions. Hv...Mass spectrometry has been applied to the study of radicals for many years. These efforts mainly involve the determination of ionization, appearance energies of radicals and the study of radical-molecule reactions. Hvistendahl and Undheim first reported that radicals produced during the volatilization stage were observed in the electron ionization (EI) mass spectra of certain cinnolinium iodides. Under chemical ionization(CI)conditions,radicals were first observed by McEwen and Rudat using a radical-trapping reaction, which was found to be at a sufficiently rapid speed in the gas phase to compete with ionization展开更多
文摘我们建立的反应质谱法(Reaction Mass Spectrometry,RMS)用于天然有机化合物立体化学分析是将立体选择反应试剂引入质谱仪离子源或碰撞室,使样品与试剂发生原位(in Situ)分子—离子反应产生特征离子,由这些离子的丰度提供样品立体结构信息,RMS为快速超微量立体化学分析提供了一种新手段。
基金Project supported by the Educational Committee of Henan Province
文摘Mass spectrometry has been applied to the study of radicals for many years. These efforts mainly involve the determination of ionization, appearance energies of radicals and the study of radical-molecule reactions. Hvistendahl and Undheim first reported that radicals produced during the volatilization stage were observed in the electron ionization (EI) mass spectra of certain cinnolinium iodides. Under chemical ionization(CI)conditions,radicals were first observed by McEwen and Rudat using a radical-trapping reaction, which was found to be at a sufficiently rapid speed in the gas phase to compete with ionization
