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- W2063204507 abstract "The 13C spin—lattice relaxation time of buckminsterfullerene was measured in toulene-d8 at 303 K. The relaxation time was found to be 162 s, 8 times longer than previously estimated. Assuming the CSA mechanism dominates the relaxation process, the experimental T1 yielded a correlation time, τc, of 16.9 ps. Various hydrodynamic-based models were utilized in an attempt at duplicating this reorientational time. We found that the Stokes—Einstein—Debye (SED) model predicted a correlation time that was only a factor of 1.3 longer than the experimentally observed value. Surprisingly, other models (e.g. Gierer—Wirtz microviscosity, Hynes—Kapral—Weinberg, and free space model) predicted values that were approximately 4 times faster than the experimentally obtained value. By introducing a simple modification to the SED model, which we term the relative free volume model, we were able to duplicate, with a reasonable amount of accuracy, the experimental correlation time. Our modified model was then applied in a number of organic liquids, of varying viscosities and molecular properties, to predict the relaxation and reorientational times of C60 in these solvents." @default.
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- W2063204507 date "1992-10-01" @default.
- W2063204507 modified "2023-09-27" @default.
- W2063204507 title "Analysis of the reorientational motion of C60 in toluene-d8 at 303 K" @default.
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- W2063204507 doi "https://doi.org/10.1016/0009-2614(92)85067-k" @default.
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