Orientational dynamics of hydrogen-bonded phenol.

Autor: Rezus, Y. L. A., Madsen, D., Bakker, H. J.
Předmět:
Zdroj: Journal of Chemical Physics; Dec2004, Vol. 121 Issue 21, p10599-10604, 6p, 1 Diagram, 9 Graphs
Abstrakt: We use femtosecond mid-infrared pump-probe spectroscopy to study the effects of hydrogen bonding on the orientational dynamics of the OD-stretch vibration of phenol-d. We study two samples: phenol-d in chloroform and phenol-d in chloroform to which we added excess acetone. For phenol-d in chloroform, we observe rotational diffusion of the OD group around the CO bond, with a correlation time of 3.7 ps. For phenol-d hydrogen bonded to acetone, the reorientation time is strongly dependent on the probe frequency, varying from 3 ps on the blue side of the spectrum to more than 30 ps on the red side. © 2004 American Institute of Physics. [ABSTRACT FROM AUTHOR]
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