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题名: VUV Photodissociation Dynamics of Nitrous Oxide: The O(S-1(j=0)) and O(P-3(j=2,1,0)) Product Channels
作者: Yu, Shengrui1, 2;  Yuan, Daofu1, 2;  Chen, Wentao1, 2;  Yang, Xueming1, 2, 3;  Wang, Xingan1, 2, 4
刊名: JOURNAL OF PHYSICAL CHEMISTRY A
发表日期: 2015-07-23
DOI: 10.1021/acs.jpca.5b04438
卷: 119, 期:29, 页:8090-8096
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: Vacuum ultraviolet photodissociation dynamics of nitrous oxide was investigated using the time-sliced velocity ion imaging technique. Images of the O(S-1(j=0)) and the O(P-3(j=2,1,0)) products were measured at nine photolysis wavelengths from 124.44 to 133.20 nm, respectively. Three main dissociation channels: O(S-1(0)) + N-2(X-1 Sigma(+)(g)), O(P-3(j=2,1,0)) + N-2(A(3)Sigma(+)(u)), and O(P-3(j=2,1,0)) + N-2(B-3 Pi(g)) were observed and identified in the product images where vibrational states of N2 were fully resolved. Product total kinetic energy releases and angular distributions were acquired. In all product channels, the branching ratios of vibrational states of N-2 products were determined. In addition, the O(P-3(j=2,1,0)) + N-2(A(3)Sigma(+)(u))/O(P-3(j=2,1,0)) + N-2(B-3 Pi(g)) branching ratios were determined. We found that in the O(P-3(j=2,1,0)) channels the O(P-3(j=2,1,0)) + N-2(B-3 Pi(g)) channel becomes dominant at long photolysis wavelength, indicating a strong coupling between the singlet D((1)Sigma(+)(g)) state and the triplet (3)Pi state. For both O(S-1(0)) and O(P-3(j=2,1,0)) products, the derived angular anisotropy parameters (beta values) are very close to 2 at lower vibrational states of the correlated N2 electronic states and gradually decrease with the increasing vibrational quantum number. These behaviors suggest that the photodissociation processes are primarily governed by a fast dissociation in a linear geometry, while the N-2 products at excited vibrational states are very likely produced via a more bent transition state.
关键词[WOS]: VACUUM UV ;  N2O ;  PHOTOLYSIS ;  ENERGY ;  OXYGEN ;  PHOTOFRAGMENTS ;  DISSOCIATION ;  SPECTRA
语种: 英语
WOS记录号: WOS:000358624200016
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/146427
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.Univ Sci & Technol China, Sch Chem & Mat Sci, Ctr Adv Chem Phys, Hefei 230026, Anhui, Peoples R China
2.Univ Sci & Technol China, Sch Chem & Mat Sci, Dept Chem Phys, Hefei 230026, Anhui, Peoples R China
3.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 116023, Liaoning Provin, Peoples R China
4.Univ Sci & Technol China, iChEM Collaborat Innovat Ctr Chem Energy Mat, Hefei 230026, Anhui, Peoples R China

Recommended Citation:
Yu, Shengrui,Yuan, Daofu,Chen, Wentao,et al. VUV Photodissociation Dynamics of Nitrous Oxide: The O(S-1(j=0)) and O(P-3(j=2,1,0)) Product Channels[J]. JOURNAL OF PHYSICAL CHEMISTRY A,2015,119(29):8090-8096.
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