Academic Journal
Photofragmentation of Isoleucine by Vacuum Ultraviolet Photoionization
| العنوان: | Photofragmentation of Isoleucine by Vacuum Ultraviolet Photoionization |
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| المؤلفون: | Xie, Yang, Cao, Lan-lan, Zhang, Qiang, Chen, Jun, Chu, Gen-bai, Zhao, Yu-jie, Shan, Xiao-bin, Liu, Fu-yi, Sheng, Liu-si |
| المصدر: | Chinese Journal of Chemical Physics ; volume 25, issue 4, page 379-388 ; ISSN 1674-0068 2327-2244 |
| بيانات النشر: | AIP Publishing |
| سنة النشر: | 2012 |
| الوصف: | 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. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| DOI: | 10.1088/1674-0068/25/04/379-388 |
| الاتاحة: | http://dx.doi.org/10.1088/1674-0068/25/04/379-388 https://pubs.aip.org/cps/cjcp/article-pdf/25/4/379/12057169/379_1_online.pdf |
| رقم الانضمام: | edsbas.A2A24F89 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1088/1674-0068/25/04/379-388 |
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