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题名: Ultrafast dynamics of dye molecules in solution as a function of temperature
作者: Liu, JY;  Fan, WH;  Han, KL;  Xu, DL;  Lou, NQ
刊名: JOURNAL OF PHYSICAL CHEMISTRY A
发表日期: 2003-03-27
DOI: 10.1021/jp0268157
卷: 107, 期:12, 页:1914-1917
收录类别: SCI
文章类型: Article
部门归属: 1101
项目归属: 1101
产权排名: 1;1
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: Femtosecond time-resolved studies using fluorescence depletion spectroscopy were performed on Rhodamine 700 in acetone solution and on Oxazine 750 in acetone and formamide solutions at different temperatures. The experimental curves that include both fast and slow processes have been fitted using a biexponential function. Time constants of the fast process, which corresponds to the intramolecular vibrational redistribution (IVR) of solute molecules, range from 300 to 420 fs and increase linearly as the temperature of the environment decreases. The difference of the average vibrational energy of solute molecules in the ground state at different temperatures is a possible reason that induces this IVR time-constant temperature dependence. However, the time constants of the slow process, which corresponds to the energy transfer from vibrational hot solute molecules to the surroundings occurred on a time scale of 1-50 ps, changed dramatically at lower temperature, nonlinearly increasing with the decrease of temperature. Because of the C-H...O hydrogen-bond between acetone molecules, it is more reasonable that acetone molecules start to be associated, which can influence the energy transfer between dye molecules and acetone molecules efficiently, even at temperatures far over the freezing point.
关键词[WOS]: VIBRATIONAL-RELAXATION ;  C-H...O ;  FLUORESCENCE SPECTROSCOPY ;  STIMULATED-EMISSION ;  ENERGY-TRANSFER ;  FEMTOSECOND ;  DEPLETION ;  ACETONE ;  SYSTEMS
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000181717500003
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/82415
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, Dalian 116023, Peoples R China

Recommended Citation:
Liu, JY,Fan, WH,Han, KL,et al. Ultrafast dynamics of dye molecules in solution as a function of temperature[J]. JOURNAL OF PHYSICAL CHEMISTRY A,2003,107(12):1914-1917.
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