Nonadiabatic dissociation dynamics in H2O: Competition between rotationally and nonrotationally mediated pathways
文献类型：期刊论文
| 作者 | Yuan, Kaijun1; Cheng, Yuan1; Cheng, Lina1; Guo, Qing1; Dai, Dongxu1; Wang, Xiuyan1; Yang, Xueming1; Dixon, Richard N.2 |
| 刊名 | proceedings of the national academy of sciences of the united states of america
 |
| 出版日期 | 2008-12-09 |
| 卷号 | 105期号:49页码:19148-19153 |
| 关键词 | photochemistry water photodissociation stereodynamics VUV photolysis |
| 英文摘要 | the photochemistry of h2o in the vuv region is important in interstellar chemistry. whereas previous studies of the photodissociation used excitation via unbound states, we have used a tunable vuv photolysis source to excite individual levels of the rotationally structured (c) over tilde state near 124 nm. the ensuing oh product state distributions were recorded by using the h-atom rydberg tagging technique. experimental results indicate a dramatic variation in the oh product state distributions and its stereodynamics for different resonant states. photodissociation of h2o((c) over tilde) in rotational states with k(a)' = 0 occurs exclusively through a newly discovered homogeneous coupling to the (a) over tilde state, leading to oh products that are vibrationally hot (up to v = 13), but rotationally cold. in contrast, for h2o in rotationally excited states with k(a)' > 0, an additional pathway opens through coriolis-type coupling to the (b) over tilde state surface. this yields extremely rotationally hot and vibrationally cold ground state oh(x) and electronically excited oh(a) products, through 2 different mechanisms. in the case of excitation via the 1(10) <- 0(00) transition the h atoms for these 2 product channels are ejected in completely different directions. quantum dynamical models for the (c) over tilde -state photodissociation clearly support this remarkable dynamical picture, providing a uniquely detailed illustration of nonadiabatic dynamics involving at least 4 electronic surfaces. |
| WOS标题词 | science & technology |
| 类目[WOS] | multidisciplinary sciences |
| 研究领域[WOS] | science & technology - other topics |
| 关键词[WOS] | multiphoton ionization spectroscopy ; oh prompt emission ; photodissociation dynamics ; molecular predissociation ; 2 comets ; water ; nm ; states ; jet ; d2o |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000261706600025 |
| 公开日期 | 2015-11-17 |
| 源URL | [http://159.226.238.44/handle/321008/141116]  |
| 专题 | 大连化学物理研究所_中国科学院大连化学物理研究所 |
| 作者单位 | 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 116023, Peoples R China 2.Univ Bristol, Sch Chem, Bristol BS8 1TS, Avon, England |
| 推荐引用方式 GB/T 7714 | Yuan, Kaijun,Cheng, Yuan,Cheng, Lina,et al. Nonadiabatic dissociation dynamics in H2O: Competition between rotationally and nonrotationally mediated pathways[J]. proceedings of the national academy of sciences of the united states of america,2008,105(49):19148-19153. |
| APA | Yuan, Kaijun.,Cheng, Yuan.,Cheng, Lina.,Guo, Qing.,Dai, Dongxu.,...&Dixon, Richard N..(2008).Nonadiabatic dissociation dynamics in H2O: Competition between rotationally and nonrotationally mediated pathways.proceedings of the national academy of sciences of the united states of america,105(49),19148-19153. |
| MLA | Yuan, Kaijun,et al."Nonadiabatic dissociation dynamics in H2O: Competition between rotationally and nonrotationally mediated pathways".proceedings of the national academy of sciences of the united states of america 105.49(2008):19148-19153. |
入库方式： OAI收割
来源：大连化学物理研究所
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