双哌嗪盐类化合物电子轰击离子化质谱研究
STUDY ON BIS-PIPERAZINIUM SALTS(M2+2Br-2HCl) BY ELECTRON IMPACT IONIZATION MASS SPECTROMETRY
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摘要: 对6个新合成的双哌嗪盐类化合物进行了电子轰击离子化质谱及其裂解规律的研究.研究表明:通过降低电子轰击电流强度,该类化合物的电子轰击离子化质谱的准分子离子和特征碎片峰非常清晰.但M+和M2+离子峰并未出现.在低电子能量条件下,发现了[M-2]+,[M-R]+,[M-R-1]+,[M-2R]+,甚至[RX]+离子峰的存在.这些现象可能与分子内的R+重排反应有关.进一步尝试提出该类化合物的电子轰击离子化质谱裂解规律,为该类化合物的质谱研究提供有用的信息.
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关键词:
- 质谱学 /
- 双哌嗪盐类研究 /
- 电子轰击离子化质谱(EIMS) /
- 裂解途径
Abstract: Electron impact ionization mass spectra of six new synthetic bis-piperazinium salts (M2+2Br-2HCl) with anti-tumor activities were obtained. Although the M+ ions and double charge ions M2+ were not observed in EI mass spectra, some strange ions such as [M-2]+ ions,[M-R]+ ions , [M-R-1]+ ions, [M-2R]+ ions and even [RX]+ ions presented in EIMS by decreasing the electron energy. These phenomena may be explained as R+ rearrangement and intermolecular reaction occurring in the condensed phase. We tried to describe the main routes of fragmentation and high sensitive mass spectra of the fragments oabout these compounds. -
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