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Rotational reorientation dynamics of C60 in various solvents. Picosecond transient grating experiments

✍ Scribed by I.V. Rubtsov; D.V. Khudiakov; V.A. Nadtochenko; A.S. Lobach; A.P. Moravskii

Publisher: Elsevier Science
Year: 1994
Tongue: English
Weight: 536 KB
Volume: 229
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(94)01074-9

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✦ Synopsis

The picosecond transient grating technique has been used to study the rotational reorientation of CGo in various solvents: in toluene 7 + 1.5 ps, o-dichlorobenzene 10.3 f 1.5 ps, o-xylene 13 f 2 ps and in decalin 3.5 + I .5 ps. The data obtained cannot be described by hydrodynamic Debye theory. Rough-sphere fluid theory predicts the correct values for Cbo rotation in toluene, odichlorobenzene and in decalin. The deviations for o-xylene are probably connected with the specifics of the local solvent structure or with the stronger interaction of C6n with solvent molecules. The rotation of C6n in decalin is rapid and approaches the rotation in the gas phase determined by inertia.

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The rotational dynamics of nile red has been studied in polar protic, polar aprotic and non-polar solvents. In the non-polar and the aprotic solvents, with the exception of long alkanenitriles, the rotation dynamics is consistent with the prediction of the Stokes-Einstein-Debye hydrodynamics theory