Photofragment Translational Spectroscopy of CF3I at 238 nm: Vibrational Distribution of CF3 Fragments and Curve Crossing Probability

doi:10.7503/cjcu20180152

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	Photofragment Translational Spectroscopy of CF3I at 238 nm: Vibrational Distribution of CF3 Fragments and Curve Crossing Probability
	Lin Dan 1,2; Cheng Min 1; Du Yikui 1; Zhu Qihe 1
刊名	CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE
	2018-08-10
卷号	39 期号:8 页码:1713-1720
关键词	Photodissociation Trifluoromethyl Iodide Photofragment Translational Spectroscopy Vibrational State Excitation Potential Curve Crossing Probability
ISSN号	0251-0790
DOI	10.7503/cjcu20180152
英文摘要	The photodissociation dynamics of CF3I at 238 nm was studied using our high resolution mini-TOF (time of flight) photofragment translational spectrometer. The results indicated the strongest signal comes from the I* channel of the (3)Q(0) parallel transition [i.e., CF3I(X)-> CF,I((3)Q(0))-> CF3(v)+I, and the vibrational peaks of CF3 fragments were resolved. From the peak gap, both the overtone bands (v(1), v(2) = 0) and the combination bands(v(1), v(2) = 1) of CF3 fragments were partially resolved (v(1) = 701 cm(-1) , the symmetric stretch mode; v(2) = 1086 cm(-1), the umbrella mode) . At 238 nm, the ratio of the two band series was found with Sigma P(v(1), 1)/Sigma P(v(1), 0) = 0.48/0.52. The vibrational distribution of CF3 fragments were also measured. The branching fractions of the four pathways were 0.664 for X ->(3)Q(0)-> I, 0.084 for X ->(3)Q(0)->(1)Q(1)-> I, 0.178 for) X ->(1)Q(1)-> I and 0.074 for X ->(1)Q(1)->(3)Q(0)-> I. The experimental curve crossing probability for (3)Q(0)->(1)Q(1), was P-0 -> 1 = 0.112 and that for (1)Q(1)->(3)Q(0) was P-1 -> 0 = 0.294. The anisotropy parameter of I channel was beta(I*) = 1.70, and that of I channel was beta(I) = -0.04.
语种	英语
出版者	HIGHER EDUCATION PRESS
WOS记录号	WOS:000440135100014
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/43049]
专题	中国科学院化学研究所
通讯作者	Cheng Min
作者单位	1.Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, State Key Lab Mol React Dynam, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Lin Dan,Cheng Min,Du Yikui,et al. Photofragment Translational Spectroscopy of CF3I at 238 nm: Vibrational Distribution of CF3 Fragments and Curve Crossing Probability[J]. CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE,2018,39(8):1713-1720.
APA	Lin Dan,Cheng Min,Du Yikui,&Zhu Qihe.(2018).Photofragment Translational Spectroscopy of CF3I at 238 nm: Vibrational Distribution of CF3 Fragments and Curve Crossing Probability.CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE,39(8),1713-1720.
MLA	Lin Dan,et al."Photofragment Translational Spectroscopy of CF3I at 238 nm: Vibrational Distribution of CF3 Fragments and Curve Crossing Probability".CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE 39.8(2018):1713-1720.