Photofragmentation of Isoleucine by Vacuum Ultraviolet Photoionization
Photofragmentation of Isoleucine by Vacuum Ultraviolet Photoionization
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真空紫外光电离异亮氨酸的光裂解
DOI:
10.1088/1674-0068/25/04/379-388
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发表时间:
2012-08
期刊:
影响因子:
--
通讯作者:
Liu-si Sheng
中科院分区:
文献类型:
--
作者:
Yang Xie;Lan-Lan Cao;Qiang Zhang;Jun Chen;Gen-bai Chu;Xiao-bin Shan;Fu-yi Liu;Liu-si Sheng
Vacuum ultraviolet photon-induced ionization and dissociation of isoleucine are investigated with synchrotron radiation photoionization mass spectroscopy and theoretical calculations. The main fragment ions at m/z=86, 75, 74, 69, 57, 46, 45, 44, 41, 30, 28, and 18 from isoleucine are observed in the mass spectrum at the photon energy of 13 eV. From the photoionization efficiency curves, appearance energies for the principal fragment ions C5H12N+ (m/z=86), C2H5NO2+ (m/z=75), C5H9+ (m/z=69), C4H9+ (m/z=57), and CH4N+ (m/z=30) are determined to be 8.84±0.07, 9.25±0.06, 10.20±0.12, 9.25±0.10, and 11.05±0.07 eV, respectively, and possible formation pathways are established in detail by the calculations at the B3LYP/6-31++G(d, p) levels. These proposed channels include simple bond cleavage reactions as well as reactions involving intermediates and transition structures. The experimental and computational appearance energies or barriers are in good agreement.
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影响因子:
15
作者:
G. Junk;H. Svec
通讯作者:
G. Junk;H. Svec
DOI:
10.1002/rcm.3198
发表时间:
2007-10
期刊:
Rapid communications in mass spectrometry : RCM
影响因子:
--
作者:
A. Armirotti;Carlo Scapolla;U. Benatti;G. Damonte
通讯作者:
A. Armirotti;Carlo Scapolla;U. Benatti;G. Damonte
DOI:
10.1039/b925338f
发表时间:
2010-05
期刊:
Physical chemistry chemical physics : PCCP
影响因子:
--
作者:
Chien-Ming Tseng;Ming-Fu Lin;Yi Lin Yang;Yu-Chieh Ho;C. Ni;Jia-Lin Chang
通讯作者:
Chien-Ming Tseng;Ming-Fu Lin;Yi Lin Yang;Yu-Chieh Ho;C. Ni;Jia-Lin Chang
DOI:
10.1021/jp9002565
发表时间:
2009-04
期刊:
The journal of physical chemistry. A
影响因子:
--
作者:
Lidong Zhang;Yang Pan;Huijun Guo;Taichang Zhang;Liu-si Sheng;F. Qi;Po-Kam Lo;K. Lau
通讯作者:
Lidong Zhang;Yang Pan;Huijun Guo;Taichang Zhang;Liu-si Sheng;F. Qi;Po-Kam Lo;K. Lau
DOI:
10.1016/0168-1176(95)04263-k
发表时间:
1995-10
期刊:
International Journal of Mass Spectrometry and Ion Processes
影响因子:
--
作者:
Liu-si Sheng;F. Qi;L. Tao;Yunwu Zhang;Shu-qin Yu;Chi-Kin Wong;Wai-Kee Li
通讯作者:
Liu-si Sheng;F. Qi;L. Tao;Yunwu Zhang;Shu-qin Yu;Chi-Kin Wong;Wai-Kee Li