Solid state proton spin relaxation and methyl and t -butyl reorientation

We have measured the temperature T and Larmor frequency ω/2π dependence of the proton spin-lattice relaxation rate R in solid 1-hydroxy-2,4,6-tri-butylbenzene. The data is interpreted in terms of the rotational motion of the t-butyl groups and their constituent methyl groups. Our data is much more e...

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Bibliographic Details
Published in:The Journal of chemical physics 1994-01, Vol.100 (1), p.752-753
Main Authors: Beckmann, Peter A., Al-Hallaq, Hania A., Fry, Anne M., Plofker, Amy L., Roe, Brian A., Weiss, Jessica A.
Format: Article
Language:English
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Summary:We have measured the temperature T and Larmor frequency ω/2π dependence of the proton spin-lattice relaxation rate R in solid 1-hydroxy-2,4,6-tri-butylbenzene. The data is interpreted in terms of the rotational motion of the t-butyl groups and their constituent methyl groups. Our data is much more extensive than a previous report [J. Yamauchi and C. A. McDowell, J. Chem. Phys. 75, 1051 (1981)] resulting in a revised dynamical model and considerably larger rotational barriers. Interesting thermal history effects are discussed.
ISSN:0021-9606
1089-7690
DOI:10.1063/1.466946