Acta Chimica Sinica ›› 2005, Vol. 63 ›› Issue (9): 834-840. Previous Articles     Next Articles

Original Articles

聚酰胺类DNA识别分子质谱的碎裂机理

李钦玲1 2,周江1,汤菲力1,袁谷*1   

  1. (1北京大学化学学院 化学生物学系 生物有机与分子工程教育部重点实验室 北京 100871)
    (2青海民族学院化学系 西宁 810007)
  • 投稿日期:2004-08-03 修回日期:2005-01-11 发布日期:2010-12-10
  • 通讯作者: 袁谷

ESI-mass Spectral Fragmentation Pathways of DNA Recognizing Polyamides

LI Qin-Ling2, ZHOU Jiang1, TANG Fei-Li1, YUAN Gu*1   

  1. (1Department of Chemical Biology, Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing 100871)
    (2Department of Chemistry, Qinghai University for Nationalities, Xi'ning 810007)
  • Received:2004-08-03 Revised:2005-01-11 Published:2010-12-10
  • Contact: YUAN Gu

Mass spectral fragmentation mechanisms of eight polyamides containing N-methylpyrrole and N-methylimidazole were investigated by electrospray ionization tandem mass spectrometry. The ESI-MSn data show that the principal fragmentation pathways of the polyamides are the cleavage of C—CO, CO—NH and NH—C bonds of the amide groups, or together with rearrangement of hydrogen atom. The differences of the ESI mass spectra suggest the structural information of polyamides, and the two isomers were distinguished by ESI-MS.

Key words: polyamide, ESI mass spectrometry, fragmentation pathway