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Photofragment Translational Spectroscopy of CF3I at 238 nm: Vibrational Distribution of CF3 Fragments and Curve Crossing Probability
Lin Dan1,2; Cheng Min1; Du Yikui1; Zhu Qihe1
2018-08-10
Source PublicationCHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE
ISSN0251-0790
Volume39Issue:8Pages:1713-1720
AbstractThe 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.
KeywordPhotodissociation Trifluoromethyl Iodide Photofragment Translational Spectroscopy Vibrational State Excitation Potential Curve Crossing Probability
DOI10.7503/cjcu20180152
Indexed BySCI
Language英语
WOS IDWOS:000440135100014
PublisherHIGHER EDUCATION PRESS
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Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/43050
Collection中国科学院化学研究所
Corresponding AuthorCheng Min
Affiliation1.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
Recommended Citation
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.
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