Watching Vibrational Energy Transfer in Liquids with Atomic Spatial Resolution
Watching Vibrational Energy Transfer in Liquids with Atomic Spatial Resolution
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DOI：
10.1126/science.1071293
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发表时间：
2002-06
期刊：
影响因子：
56.9
通讯作者：
Zhaohui Wang;Andrei V. Pakoulev;D. Dlott
中科院分区：
文献类型：
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作者：
Zhaohui Wang;Andrei V. Pakoulev;D. Dlott
采用超快光谱技术研究了液体分子不同部位振动报告基团之间的振动能量传递。当中红外激光脉冲激发不同醇的OH伸缩振动时，观察到振动能量在中间的CH2或CH基团之间移动，能量上下移动，最终到达末端的CH3基团。在OH和CH3之间的路径上每增加一个CH2基团，振动能量传递的时间增加约0.4皮秒。
Ultrafast spectroscopy was used to study vibrational energy transfer between vibrational reporter groups on different parts of a molecule in a liquid. When OH stretching vibrations of different alcohols were excited by mid-infrared laser pulses, vibrational energy was observed to move through intervening CH2 or CH groups, taking steps up and down in energy, ending up at terminal CH3 groups. For each additional CH2 group in the path between OH and CH3, the time for vibrational energy transfer increased by about 0.4 picosecond.