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学科主题: 物理化学
题名: Hydrogen bonding tunes the early stage of hydrogen-atom abstracting reaction
作者: Yang, Yang1, 2;  Liu, Lei1;  Chen, Junsheng1;  Han, Keli1
通讯作者: 韩克利
刊名: PHYSICAL CHEMISTRY CHEMICAL PHYSICS
发表日期: 2014-09-07
DOI: 10.1039/c4cp01371a
卷: 16, 期:33, 页:17828-17834
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: The spontaneous and collision-assisted hydrogen-atom abstracting reaction (HA) dynamics of triplet benzil are investigated through the combination of transient absorption spectroscopy with TD-DFT calculations. HA dynamics exhibit a remarkable dependence on the hydrogen donor properties. The effects of the triplet-state hydrogen bonding on the reaction dynamics are illustrated. In particular, it is experimentally observed that strengthened triplet-state hydrogen bonding could accelerate the HA, whereas weakened triplet-state hydrogen bonding would postpone the HA. The triplet-state hydrogen bonding has great influences on the early stage of the HA reaction, while the bond dissociation energy of the hydrogen donors determines the subsequent reaction pathways. Protic solvents could sustain longer lifetimes of the excited-state intermediate formed after HA than non-protic solvents by 10 mu S. This investigation provides insights into the HA dynamics and guidance to improve the product efficiency of photochemical reactions.
关键词[WOS]: ELECTRON-TRANSFER ;  EXCITED-STATE ;  FLUORESCENCE ;  TRIPLETS ;  SOLVENTS ;  PHOTOCHEMISTRY ;  MECHANISM ;  DYNAMICS ;  PHENOLS
语种: 英语
WOS记录号: WOS:000341064800053
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/144191
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.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, Key Lab Chem Lasers, Dalian 116023, Peoples R China

Recommended Citation:
Yang, Yang,Liu, Lei,Chen, Junsheng,et al. Hydrogen bonding tunes the early stage of hydrogen-atom abstracting reaction[J]. PHYSICAL CHEMISTRY CHEMICAL PHYSICS,2014,16(33):17828-17834.
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