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题名: Wavelength-dependent Photodissociation Dynamics of Benzaldehyde
作者: Liu, Ben-kang1, 2;  Wang, Bing-xing1, 2;  Wang, Yan-qiu1;  Wang, Li1
关键词: Benzaldehyde ;  Ultrafast process ;  Femtosecond pump-probe
刊名: CHINESE JOURNAL OF CHEMICAL PHYSICS
发表日期: 2009-12-27
DOI: 10.1088/1674-0068/22/06/587-591
卷: 22, 期:6, 页:587-591
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Physics, Atomic, Molecular & Chemical
研究领域[WOS]: Physics
英文摘要: The ultrafast dynamics of benzaldehyde upon 260., 271; 284, and 287 nm excitations have been studied by femtosecond pump-probe time-of-flight mass spectrometry. A bi-exponential decay component model was applied to fit the transient profiles of benzaldehyde ions and fragment ions. At the S-2 origin, the first decay of the component was attributed to the internal conversion to the high vibrational levels of S-1 state. Lifetimes of the first component decreased with increasing vibrational energy, due to the influence of high density of the vibrational levels. The second decay was assigned to the vibrational relaxation of the S-1 whose lifetime was about 600 fs. Upon 287 ran excitation, the first decay became ultrashort (similar to 56 fs) which was taken for the intersystem cross from S-1 to T-2, while the second decay component was attributed to the vibrational relaxation. The pump-probe transient of fragment was also studied with the different probe intensity at 284 nm pump.
关键词[WOS]: RESOLVED PHOTOELECTRON-SPECTROSCOPY ;  AROMATIC CARBONYL-COMPOUNDS ;  ABSORPTION CROSS-SECTIONS ;  RADIATIONLESS TRANSITIONS ;  RELAXATION DYNAMICS ;  ULTRAFAST DYNAMICS ;  DARK STRUCTURES ;  BENZENE DIMER ;  CHANNEL 3 ;  STATES
语种: 英语
WOS记录号: WOS:000273466600006
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/141562
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.Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China

Recommended Citation:
Liu, Ben-kang,Wang, Bing-xing,Wang, Yan-qiu,et al. Wavelength-dependent Photodissociation Dynamics of Benzaldehyde[J]. CHINESE JOURNAL OF CHEMICAL PHYSICS,2009,22(6):587-591.
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