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题名: Photofragment translational spectroscopy of n-C3H7I and i-C3H7I near 280 and 304 nm
作者: Xu, Xiling1;  Yu, Zijun1;  Bi, Weibin1;  Xiao, Daoqing1;  Yu, Dan1;  Du, Yikui1;  Zhu, Qihe1
刊名: JOURNAL OF PHYSICAL CHEMISTRY A
发表日期: 2008-03-06
DOI: 10.1021/jp0756956
卷: 112, 期:9, 页:1857-1863
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Physical ;  Physics, Atomic, Molecular & Chemical
研究领域[WOS]: Chemistry ;  Physics
英文摘要: The photodissociation dynamics of propyl iodides n-C3H7I and i-C3H7I near 280 and 304 nm has been investigated with our mini-TOF photofragment translational spectrometer. When a single laser is applied for both the photodissociation of parent molecules and the REMPI of I atom photofragments, the TOF spectra of photofragments I*('P-1/2) and I (P-2(3/2)) are obtained at four different wavelengths for these two iodides. For n-C3H7I, some small vibrational peaks are partially resolved (with separation of similar to 522 cm(-1), corresponding to the RCH2 deformation frequency of the fragment n-C3H7) at 281.73, 279.71, and 304.67 nm. These results show that the RCH2 deformation is mostly excited. For i-C3H7I, we obtain some partially resolved vibrational peaks (with separation of similar to 352 cm(-1), corresponding to the HC(CH3)(2) out-of-plane bending frequency of the fragment i-C3H7) at 281.73 nm only. For n-C3H7I, the partitioning values of the available energy (E) over bar (int)/E-avl are 0.48 at 281.73 nm and 0.49 at 304.02 nm for the I* channel, and 0.52 at both 279.71 and 304.67 nm for the I channel. These energy partitioning values are comparable with the previous results at different wavelengths in the literature. For i-C3H7I, the (E) over bar (int)/E-avl values are 0.61 at 281.73 nm, 0.65 at 304.02 nm for the I* channel, and 0.62 at 279.71 nm, 0.49 at 304.67 nm for the I channel. The potential-energy-surface crossing and the beta values have also been discussed.
关键词[WOS]: PHOTODISSOCIATION DYNAMICS ;  RECOIL ANISOTROPY ;  METHYL-IODIDE ;  A-BAND ;  INTERNAL EXCITATION ;  ENERGY DEPENDENCE ;  INFRARED-SPECTRA ;  ALKYL RADICALS ;  KINETIC-ENERGY ;  CF3I
语种: 英语
WOS记录号: WOS:000253512600003
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/141151
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Chem, State Key Lab Mol React Dynam, Beijing Natl Lab Mol Sci, Beijing 100080, Peoples R China

Recommended Citation:
Xu, Xiling,Yu, Zijun,Bi, Weibin,et al. Photofragment translational spectroscopy of n-C3H7I and i-C3H7I near 280 and 304 nm[J]. JOURNAL OF PHYSICAL CHEMISTRY A,2008,112(9):1857-1863.
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