物理化学学报 >> 1999, Vol. 15 >> Issue (09): 860-864.doi: 10.3866/PKU.WHXB19990917

研究简报 上一篇    

对氨基偶氮苯的同步辐射光电离与光离解

武国华, 盛六四, 高辉, 张允武   

  1. 中国科学技术大学,国家同步辐射实验室,合肥 230029
  • 收稿日期:1998-12-30 修回日期:1999-03-26 发布日期:1999-09-15
  • 通讯作者: 武国华

Studies on p-aminoazobenzene(C12H11N3)Using Photoionization Mass Spectrum with Synchrotron Radiation(SR)

Wu Guo-Hua, Sheng Liu-Si, Gao Hui, Zhang Yun-Wu   

  1. Nationl Synchrotron Radiation Laboratory,University of Science and Technology of China,Hefei 230029
  • Received:1998-12-30 Revised:1999-03-26 Published:1999-09-15
  • Contact: Wu Guo-Hua

关键词: 同步辐射, 光电离, 质谱, 电离势, 对氨基偶氮苯

Abstract:

In this paper, the photoionization and photodissociative ionization processes of p-aminoazobenzene (pAAB, C12H11N3) using coincidence technology with vacuum ultraviolet synchrotron radiation (SR) photoionizaton mass spectroscopy are reported. The ionization potential (IP) of this molecule and the appearance potentials (AP) of the important ionic fragments from the SR photodissociative ionization of pAAB have been measured. On the basis of the IP(C12H11N3) and AP measured in this experiment and the IP(C6H5) from the literature, the dissociative energy D 0(C 6H 5-N 2C 6H 4NH 2),D 0(C 6H + 5-N 2C 6H 4NH 2),D 0(C 6H 5-N 2C 6H 4NH + 2),D 0(C 6H 5N 2-C 6H 4NH 2 +) and ionization potential of free radical N 2C 6H 4NH 2 have been evaluated. Based on the results of the mass spectroscopy of pAAB obtained with SR photoionization, the possible channels of photodissociative ionization of pAAB have been analyzed. The processes(molecular ions or the fregmental ions) giving rise to the ions C 6H + 5 and C 6H 6N + need further study.  

Key words: Synchrotron Radiation, Photoionization, Mass Spectrum, Ionization potential, p-aminoazobenzene