Ultrafast Predissociation Dynamics of Excited State of Acrylic Acid
文献类型：期刊论文
| 作者 | Zhang Rong-Rong; Qin Chao-Chao; Long Jin-You; Yang Ming-Hui; Zhang Bing1 |
| 刊名 | ACTA PHYSICO-CHIMICA SINICA
 |
| 出版日期 | 2012-03-01 |
| 卷号 | 28期号:3页码:522-527 |
| 关键词 | Time-resolved mass spectrum Ultrafast dynamics Pump-probe Time-of-flight mass spectroscopy Internal conversion |
| 英文摘要 | The ultrafast predissociation dynamics of acrylic acid after excitation to the second electronically excited state (S-2) with a 200 nm pump pulse were studied using a femtosecond pump-probe technique combined with time-of-flight mass spectroscopy (TOF-MS). The time-resolved mass spectra signals of the parent ion and fragment ions were collected. By using the kinetic equations to fit and analyze the time-resolved mass spectra ion signals, the existence of the predissociation channel was revealed. The excited molecule populated in the S-2 state decayed to the first electronically excited state (S-1) through a fast internal conversion process over a period of 210 fs. The excited molecule populated on the S-1 state then decayed to the vibrationally hot ground state (S-0) through another internal conversion process over a period of 1.49 ps. Finally, on the vibrationally hot ground state surface, the molecule dissociated to the neutral fragments, H2C=CH and HOCO, H2C=CHCO and OH via C - C bond fission and C - O bond fission, respectively. The corresponding predissociation time constants were determined to be approximately 4 and 3 ps, respectively. The generation of fragment ions can occur in two ways, both from the dissociation of the parent ion and the ionization of the neutral fragments on the vibrationally hot ground state surface. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Chemistry, Physical |
| 研究领域[WOS] | Chemistry |
| 关键词[WOS] | GAS-PHASE ; SURFACE CROSSINGS ; CARBOXYLIC-ACIDS ; AB-INITIO ; 193 NM ; PHOTODISSOCIATION ; ACROLEIN ; ALPHA,BETA-ENONES ; PHOTOCHEMISTRY ; DISSOCIATION |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000301693800003 |
| 公开日期 | 2016-05-09 |
| 源URL | [http://ir.wipm.ac.cn/handle/112942/1643]  |
| 专题 | 武汉物理与数学研究所_原子分子光物理研究部 |
| 作者单位 | 1.Chinese Acad Sci, Wuhan Inst Phys & Math, State Key Lab Magnet Resonance & Atom & Mol Phys, Wuhan 430071, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang Rong-Rong,Qin Chao-Chao,Long Jin-You,et al. Ultrafast Predissociation Dynamics of Excited State of Acrylic Acid[J]. ACTA PHYSICO-CHIMICA SINICA,2012,28(3):522-527. |
| APA | Zhang Rong-Rong,Qin Chao-Chao,Long Jin-You,Yang Ming-Hui,&Zhang Bing.(2012).Ultrafast Predissociation Dynamics of Excited State of Acrylic Acid.ACTA PHYSICO-CHIMICA SINICA,28(3),522-527. |
| MLA | Zhang Rong-Rong,et al."Ultrafast Predissociation Dynamics of Excited State of Acrylic Acid".ACTA PHYSICO-CHIMICA SINICA 28.3(2012):522-527. |
入库方式： OAI收割
来源：武汉物理与数学研究所
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