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Dissociation Pathway Analysis of Thymine under Low Energy VUV Photon Excitation
Shao-bo Li,Hui-jun Guo,Li-dong Zhang*,Fei Qi
Author NameAffiliationE-mail
Shao-bo Li National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, ChinaDepartment of Chemical and Materials Engineering, Hefei University, Hefei 230022, China  
Hui-jun Guo National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, China  
Li-dong Zhang* National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, China zld@ustc.edu.cn 
Fei Qi National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, China  
Abstract:
Photon-induced dissociation pathways of thymine are investigated with vacuum ultraviolet photoionization mass spectrometry and theoretical calculations. The photoionization mass spectra of thymine at different photon energy are measured and presented. By selecting suitable photon energy, exclusively molecular ion m/z=126 is obtained. At photon energy of 12.0 eV, the major ionic fragments at m/z=98, 97, 84, 83, 70, and 55 are obtained, which are assigned to C4H6N24O+、C4H5N2O+、C3H4N2O+(or C4H6NO+)、C4H5NO+、C2NO2+ and C3H5N+, respectively. With help of theoretical calculations, the detailed dissociation pathways of thymine at low energy are well established.
Key words:  Thymine, Dissociation pathway, VUV photoionization, Mass spectrometry, Theoretical calculation
FundProject:
胸腺嘧啶低能量VUV光解离路径的实验和理论研究
李少波,郭会军,张李东*,齐飞
摘要:
利用同步辐射真空紫外光电离质谱和理论计算研究了胸腺嘧啶的光解离反应路径, 通过改变光子能量得到不同的质谱信号, 光子能量在12.0 eV时主要的碎片有m/z=98 (C4H6N24O+)、97 (C4H5N2O+)、84 (C3H4N2O+或C<
关键词:  胸腺嘧啶,解离路径,VUV光电离,质谱,理论计算
DOI:10.1088/1674-0068/24/03/275-283
分类号: