Production and Photodissociation of the Methyl Perthiyl Radical

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• 作者：Neil C. Cole-Filipiak ; Mark Shapero ; Courtney Haibach-Morris ; Daniel M. Neumark
• 刊名：Journal of Physical Chemistry A
• 出版年：2016
• 出版时间：July 14, 2016
• 年：2016
• 卷：120
• 期：27
• 页码：4818-4826
• 全文大小：438K
• 年卷期：0
• ISSN：1520-5215

文摘

The photodissociation dynamics of the methyl perthiyl (CH₃SS) radical are investigated via molecular beam photofragment translational spectroscopy, using “soft” electron ionization to detect the radicals and their photofragments. With this new capability, we have shown that CH₃SS can be generated from flash pyrolysis of dimethyl trisulfide. Utilizing this source of radicals and the advantages afforded by soft electron ionization, we have reinvestigated the photodissociation dynamics of CH₃SS at 248 nm, finding CH₃S + S to be the dominant dissociation channel with CH₃ + SS as a minor process. These results differ from previous work reported in our laboratory in which we found CH₃ + SS and CH₂S + SH as the main dissociation channels. The difference in results is discussed in light of our new capabilities for characterization of radical production.