Ionization/dissociation processes of methyl-substituted derivates of cyclopentanone in intense femtosecond laser field
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- 作者：Qiaoqiao Wang ; Yuri A. Dyakov ; Di Wu ; Dongdong Zhang ; Mingxing Jin ; Fuchun Liu ; Hang Liu ; Zhan Hu ; Dajun Ding ; Hirobumi Mineo ; Yoshiaki Teranishi ; Sheng Der Chao ; Sheng Hsien Lin ; O.K. Kosheleva ; A.M. Mebel
- 刊名：Chemical Physics Letters
- 出版年：2013
- 出版时间：24 October, 2013
- 年：2013
- 卷：586
- 期：Complete
- 页码：21-28
- 全文大小：2380 K
文摘
Ionization and dissociation of 2- and 3-methyl cyclopentanones have been investigated in molecular beams by their irradiation with intense 394 and 788 nm laser fields with pulse duration of 90 fs and intensity of 3 ¡Á 1013-4 ¡Á 1014 W/cm2. The analysis of the resulting mass spectra allowed us to discern the effects of methyl substitution and its position on the outcome of ionization/dissociation processes induced by the intense femtosecond laser field. Generalized Keldysh-Faisal-Reiss (g-KFR) and ab initio G3(MP2,CCSD)//B3LYP/6-31G?/RRKM theoretical calculations helped to uncover the formation mechanism of major ionic fragments observed in the mass spectra including C5H10+, C4H6O+, C3H3O+, C3H4O+, C3Hx+, and C2Hx+.