Synchrotron threshold photoelectron photoion coincidence spectroscopy of radicals produced in a pyrolysis source: The methyl radical

被引：15
|
作者：
Zhu, Yupeng [1 ,2 ]
Wu, Xiangkun [3 ,4 ]
Tang, Xiaofeng [1 ]
Wen, Zuoying [1 ,2 ]
Liu, Fuyi [5 ]
Zhou, Xiaoguo [3 ,4 ]
Zhang, Weijun [1 ,6 ]
机构：
[1] Chinese Acad Sci, Anhui Inst Opt & Fine Mech, Lab Atmospher Physicochem, Hefei 230031, Anhui, Peoples R China
[2] Univ Sci & Technol China, Grad Sch, Hefei 230026, Anhui, Peoples R China
[3] Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Peoples R China
[4] Univ Sci & Technol China, Dept Chem Phys, Hefei 230026, Peoples R China
[5] Univ Sci & Technol China, Natl Synchrotron Radiat Lab, Hefei 230029, Peoples R China
[6] Univ Sci & Technol China, Sch Environm Sci & Optoelect Technol, Hefei 230026, Anhui, Peoples R China
来源：
CHEMICAL PHYSICS LETTERS | 2016年 / 664卷
基金：
中国国家自然科学基金;
关键词：
Methyl radical; Flash pyrolysis; Threshold photoelectron spectroscopy; PEPICO; Vacuum ultraviolet; Photoionization; UMBRELLA MODE; CHEMISTRY; DYNAMICS; ELECTRONS; SPECTRUM; STATES; CH3;
D O I：
10.1016/j.cplett.2016.10.041
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
We present here a flash pyrolysis source coupled with a threshold photoelectron photoion coincidence (TPEPICO) spectrometer and vacuum ultraviolet synchrotron radiation to investigate the spectroscopy and photochemistry of free radicals. The radicals are produced from pyrolysis in a heated silicon carbide tube, and the TPEPICO scheme provides a strategy to obtain pure spectra of the radicals without contamination from other byproducts. As a representative example, the methyl radical was studied, and its threshold photoelectron spectrum shows a series of umbrella vibrational transitions. The adiabatic ionization energy of the methyl radical was determined to be 9.84 +/- 0.01 eV. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码：237 / 241
页数：5
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