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Science 21 June 2002:
Vol. 296. no. 5576, pp. 2201 - 2203
DOI: 10.1126/science.1071293
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Reports

Watching Vibrational Energy Transfer in Liquids with Atomic Spatial Resolution

Zhaohui Wang, Andrei Pakoulev, Dana D. Dlott*

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.

School of Chemical Sciences, University of Illinois at Urbana-Champaign, Box 01-6 CLSL, 600 South Mathews Avenue, Urbana, IL 61801, USA.
*   To whom correspondence should be addressed. E-mail: Dlott{at}scs.uiuc.edu

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