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Vibrationally Resolved Photofragment Translational Spectroscopy of CH3I from 277 to 304 nm with Increasing Effect of the Hot Band
Cheng, Min1,2; Yu, Zijun1,2; Hu, Lili1,2; Yu, Dan1,2; Dong, Changwu1,2; Du, Yikui1; Zhu, Qihe1
2011-02-24
Source PublicationJOURNAL OF PHYSICAL CHEMISTRY A
ISSN1089-5639
Volume115Issue:7Pages:1153-1160
AbstractThe photodissociation dynamics of CH3I from 277 to 304 nm is studied with our mini-TOF photofragment translational spectrometer. A single laser beam is used for both photodissociation of CH3I and REMPI detection of iodine. Many resolved peaks in each photofragment translational spectrum reveal the vibrational states of the CH3 fragment. There are some extra peaks showing the existence of the hot-band states of CH3I. After careful simulation with consideration of the hot-band effect, the distribution of vibrational states of the CH3 fragment is determined. The fraction sigma of photofragments produced from the hot-band CH3I varies from 0.07 at 277.38 nm to 0.40 at 304.02 nm in the I* channel and from 0.05 at 277.87 nm to 0.16 at 304.67 nm in the I channel. E-int/E-avl of photofragments from ground-state CH3I remains at about 0.03 in the I* channel for all four wavelengths, but E-int/E-avl decreases from 0.09 at 277.87 run to 0.06 at 304.67 nm in the I channel. From the ground-state CH3I, the quantum yield Phi(I*) is determined to be 0.59 at 277 nm and 0.05 at 304 nm. The curve-crossing probability P-cc from the hot-band CH3I is lower than that from the ground-state CH3I. The potential energy at the curve-crossing point is determined to be 32 740 cm(-1).
DOI10.1021/jp106624q
Indexed BySCI
Language英语
WOS IDWOS:000287337900001
PublisherAMER CHEMICAL SOC
Citation statistics
Cited Times:12[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/72530
Collection中国科学院化学研究所
Corresponding AuthorDu, Yikui
Affiliation1.Chinese Acad Sci, Inst Chem, State Key Lab Mol React Dynam, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Cheng, Min,Yu, Zijun,Hu, Lili,et al. Vibrationally Resolved Photofragment Translational Spectroscopy of CH3I from 277 to 304 nm with Increasing Effect of the Hot Band[J]. JOURNAL OF PHYSICAL CHEMISTRY A,2011,115(7):1153-1160.
APA Cheng, Min.,Yu, Zijun.,Hu, Lili.,Yu, Dan.,Dong, Changwu.,...&Zhu, Qihe.(2011).Vibrationally Resolved Photofragment Translational Spectroscopy of CH3I from 277 to 304 nm with Increasing Effect of the Hot Band.JOURNAL OF PHYSICAL CHEMISTRY A,115(7),1153-1160.
MLA Cheng, Min,et al."Vibrationally Resolved Photofragment Translational Spectroscopy of CH3I from 277 to 304 nm with Increasing Effect of the Hot Band".JOURNAL OF PHYSICAL CHEMISTRY A 115.7(2011):1153-1160.
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