Acta Phys. -Chim. Sin. ›› 2000, Vol. 16 ›› Issue (10): 948-951.doi: 10.3866/PKU.WHXB20001015

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Photoionization and Photodissociative lonization of Azoxybenzene(C12H10N2O) by Vacuum Ultraviolet Synchrotron Radiation (SR)

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

  1. National Synchrotron Radiation Laboratory,University of Science Technology of China,Hefei 230026|Department of Chemistry,University of Science Technology of China,Hefei 230026
  • Received:1999-12-07 Revised:2000-04-24 Published:2000-10-15
  • Contact: Sheng Liu-Si


The photoionization and photodissociative ionization processes of azoxybenzene (C12H10N2O,AOB) have been studied using the photoionization mass spectrometry with vacuum ultraviolet synchrotron radiation (SR) as the light source. The ionization potential (IP) of this molecule and four appearance potentials (AP) of the important ionic fragments from the SR photodissociative ionization of AOB have been measured. On the basis of the IP(C12H10N2O) and AP() measured in this experiment, the dissociative energy D0(-N2OC6H5) has been evaluated. Based on the results of the mass spectroscopy of AOB, the possible channels of photodissociative ionization of AOB have been analyzed.

Key words: Synchrotron radiation, Photoionization, Mass spectrum, Ionization potential, Azoxybenzene