Synchrotron Radiation Study of Photoionization and Photodissociation of Freon HFC-134a

Chem. J. Chinese Universities ›› 2005, Vol. 26 ›› Issue (12): 2314.

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Synchrotron Radiation Study of Photoionization and Photodissociation of Freon HFC-134a

HUANG Chao-Qun¹,YANG Bin¹,YANG Rui1,WEI Li-Xia¹,WANG Si-Sheng¹,SHAN Xiao-Bin¹,QI Fei¹,ZHANG Yun-Wu¹,SHENG Liu-Si^1*, HAO Li-Qing², ZHOU Shi-Kang², WANG Zhen-Ya²

1. National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, China;
2. Laboratory of Environmental Spectroscopy, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China

Received:2004-11-17 Online:1905-03-14 Published:1905-03-14
Contact: SHENG Liu-Si;E-mail:lssheng@ustc.edu.cn

Abstract

Abstract:

Photoionization and photodissociation of HFC-134a were studied by using synchrotron radiation and a reflectron time-of-flight mass spectrometry(RTOF-MS). The ionization energy of parent molecule(12. 68±0. 04) eV and appearance potentials of various fragment ions were determined by measuring their photoionization efficiency curves. Energies, symmetry point groups and ground electronic states of the neutrals and cations of parent and its fragments were calculated by Gaussian-03 program with the G3 method. According to the theoretical and experimental results, some dissociation channels and their dissociation energies of CH₂FCF⁺₃ were analyzed.

Key words: Freon HFC-134a; Photoionization; Ionization energy; Appearance potential; Dissociation energy, Freon HFC-134a, Photoionization, Ionization energy, Appearance potential, Dissociation energy

CLC Number:

O644

TrendMD:

HUANG Chao-Qun, YANG Bin, YANG Rui, WEI Li-Xia, WANG Si-Sheng, SHAN Xiao-Bin, QI Fei, ZHANG Yun-Wu, SHENG Liu-Si, HAO Li-Qing, ZHOU Shi-Kang, WANG Zhen-Ya. Synchrotron Radiation Study of Photoionization and Photodissociation of Freon HFC-134a[J]. Chem. J. Chinese Universities, 2005, 26(12): 2314.

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Synchrotron Radiation Study of Photoionization and Photodissociation of Freon HFC-134a

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