Orientational dynamics of hydrogen-bonded phenol

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Publication date
DOI http://dx.doi.org/10.1063/1.1809589
Reference Y.L.A. Rezus, D. Madsen and H.J. Bakker, Orientational dynamics of hydrogen-bonded phenol, J. Chem. Phys. 121, 10599-10604 (2004)
Group Ultrafast Spectroscopy

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.