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题名: Dynamics of Highly Excited Nitroaromatics
作者: Wang, Bingxing1, 2;  Liu, Benkang1, 2;  Wang, Yanqiu1;  Wang, Li1
刊名: JOURNAL OF PHYSICAL CHEMISTRY A
发表日期: 2010-12-23
DOI: 10.1021/jp104727p
卷: 114, 期:50, 页:12972-12978
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: Although the photodissociation of nitroaromatics in low excitation electronic states has been extensively studied in recent decades, little is known about the highly excited electronic states. The fragmentation dynamics of three nitroaromatics, nitrobenzene, o-nitrotoluene, and m-nitrotoluene, in highly excited states, populated by the absorption of two photons at 271 nm, are studied with time-of-flight mass spectrometry. The temporal evolutions of the highly excited states are monitored by one-photon ionization at 408 nm. The transients of parent and fragment ions exhibit two ultrafast deactivation processes. The first process is ultrafast internal conversion from the initial excitation to Rydberg states in tens of femtoseconds. The second one is conversion from the Rydberg states to the vibrational manifold in the ground electronic states within hundreds of femtoseconds. The internal conversion process is accelerated by methyl substitution. In o-nitrotoluene, the two processes become much faster due to the hydrogen transfer from the CH(3) to the NO(2) group (ortho effect).
关键词[WOS]: RESOLVED PHOTOELECTRON-SPECTROSCOPY ;  ENERGY-LOSS SPECTROSCOPY ;  MULTIPHOTON IONIZATION ;  MASS-SPECTROMETRY ;  PHOTODISSOCIATION DYNAMICS ;  RELAXATION DYNAMICS ;  QUANTUM CONTROL ;  RYDBERG STATES ;  O-NITROTOLUENE ;  NITROBENZENE
语种: 英语
WOS记录号: WOS:000285236500002
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/142170
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:
Wang, Bingxing,Liu, Benkang,Wang, Yanqiu,et al. Dynamics of Highly Excited Nitroaromatics[J]. JOURNAL OF PHYSICAL CHEMISTRY A,2010,114(50):12972-12978.
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