DICP OpenIR
Ultraviolet photodissociation of C2F5I with a small and simple photofragment translational spectrometer
Yu, Zijun1,2; Xu, Xiling1,2; Cheng, Min1,2; Yu, Dan1,2; Du, Yikui1; Zhu, Qihe1
关键词Molecule-photon Collisions Organic Compounds Photodissociation Potential Energy Surfaces Rotational-vibrational Energy Transfer
刊名JOURNAL OF CHEMICAL PHYSICS
2009-07-28
DOI10.1063/1.3186737
131期:4
收录类别SCI
文章类型Article
WOS标题词Science & Technology ; Physical Sciences
类目[WOS]Physics, Atomic, Molecular & Chemical
研究领域[WOS]Physics
关键词[WOS]248 NM ; UV-PHOTODISSOCIATION ; ALKYL IODIDES ; RECOIL ANISOTROPY ; ENERGY DEPENDENCE ; MOLECULAR-BEAMS ; AB-INITIO ; CF3I ; DYNAMICS ; SPECTROSCOPY
英文摘要Photodissociation dynamics of C2F5I near 280 and 304 nm has been investigated on a small and simple time-of-flight photofragment translational spectrometer (PTS). On this new PTS, the photolyzed and ionized fragments, not accelerated by electric field, travel freely for a short flight path (< 50 mm) and are detected by microchannel plates. In the spectra of the I-*(P-2(1/2)) channel at 281.73 and 304.02 nm, vibrational peaks with spacing of similar to 350 cm(-1) are partially resolved, indicating the preferential excitation of CF2 wag mode (nu(11)=366 cm(-1)) of C2F5 photofragment. The fraction of the available energy disposed into the internal energy is higher than 50% for both I-* channel and I channel, showing the high excitation of vibration in the C2F5 fragments. The fragment recoil anisotropy parameter beta(I-*), determined to be 1.70 at 281.73 nm and 1.64 at 304.02 nm, reveals that I-* atoms are produced predominantly from the parallel (3)Q(0)<- N transition. The anisotropy parameter beta(I), determined to be 1.25 at 279.71 nm and 0.88 at 304.67 nm, implies that I atoms are produced from two excited states, i.e., direct dissociation via the perpendicular (3)Q(1)<- N transition, and indirect dissociation via the parallel (3)Q(0)<- N transition then curve crossing to the (1)Q(1) potential energy surface. Analysis on the recent studies with vibrational state resolution in the photodissociation of alkyl iodides in the A band reveals that the "symmetric bending" mode on alpha-carbon of alkyl iodides is the preferential vibrational excitation mode, which can be explained by the classic impulsive model.
语种英语
WOS记录号WOS:000268613700054
引用统计
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/141469
专题中国科学院大连化学物理研究所
作者单位1.Chinese Acad Sci, Inst Chem, Natl Lab Mol Sci, State Key Lab Mol React Dynam, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714
Yu, Zijun,Xu, Xiling,Cheng, Min,et al. Ultraviolet photodissociation of C2F5I with a small and simple photofragment translational spectrometer[J]. JOURNAL OF CHEMICAL PHYSICS,2009,131(4).
APA Yu, Zijun,Xu, Xiling,Cheng, Min,Yu, Dan,Du, Yikui,&Zhu, Qihe.(2009).Ultraviolet photodissociation of C2F5I with a small and simple photofragment translational spectrometer.JOURNAL OF CHEMICAL PHYSICS,131(4).
MLA Yu, Zijun,et al."Ultraviolet photodissociation of C2F5I with a small and simple photofragment translational spectrometer".JOURNAL OF CHEMICAL PHYSICS 131.4(2009).
条目包含的文件
条目无相关文件。
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Yu, Zijun]的文章
[Xu, Xiling]的文章
[Cheng, Min]的文章
百度学术
百度学术中相似的文章
[Yu, Zijun]的文章
[Xu, Xiling]的文章
[Cheng, Min]的文章
必应学术
必应学术中相似的文章
[Yu, Zijun]的文章
[Xu, Xiling]的文章
[Cheng, Min]的文章
相关权益政策
暂无数据
收藏/分享
所有评论 (0)
暂无评论
 

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。