Two- and three-body dissociations of C3H6 isomer dications investigated by 4 keV/u Ar8+ impact
Two- and three-body dissociations of C3H6 isomer dications investigated by 4 keV/u Ar8+ impact
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通过 4 keV/u Ar8 撞击研究 C3H6 异构体二价体的二体和三体解离
DOI：
10.1063/5.0123266
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发表时间：
2022
影响因子：
4.4
通讯作者：
Xinwen Ma
中科院分区：
文献类型：
--
作者：
Dalong Guo;Kaizhao Lin;Xiaolong Zhu;Ruitian Zhang;Yong Gao;Dongmei Zhao;Xubin Zhu;Shaofeng Zhang;Xinwen Ma
用反应显微镜研究了C_3H_6的两种异构体环丙烷和丙烯在4keV/uAr ~（8+）诱导下的裂解动力学。C_3H_62 ~+离子的四个二体和两个三体解离通道被确定为每个异构体，其中涉及CC键断裂的通道被发现比H_3 ~+和H_2 ~+形成通道更有利。观察到的CH 3+或H 3+形成通道的环丙烷的质子迁移的碳骨架解离前的直接证据。通过比较两种异构体不同通道的相对分支比，揭示了明显的异构体效应。此外，它表明，一个连续的解离机制与H消除之前CC键裂解可能是占主导地位的两个三体解离通道的两个异构体。
The fragmentation dynamics of two isomers of C3H6, cyclopropane and propene, induced by 4 keV/u Ar8+ are investigated employing a reaction microscope. Four two-body and two three-body dissociation channels of C3H62+ dications are identified for each isomer, among which the channels involving CC bond breaking are found to be much more favored than H3+ and H2+ formation channels. The observation of the CH3+ or H3+ formation channels from cyclopropane are direct evidence of the proton migration within the carbon skeleton before dissociation. Obvious isomer effects are revealed by comparing the relative branching ratios of different channels of the two isomers. Moreover, it was shown that a sequential dissociation mechanism with H elimination prior to CC bond cleavage may be dominant for the two three-body dissociation channels for both isomers.