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Spin—rotational relaxation study of molecular reorientation in the presence of internal extended rotational diffusion

✍ Scribed by Doo Soo Chung; Eun Mi Kim; Kook Joe Shin

Publisher
Elsevier Science
Year
1984
Tongue
English
Weight
394 KB
Volume
108
Category
Article
ISSN
0009-2614

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✦ Synopsis

Rcccived 17 f\pril 1984 \lolecular reorientation in the presence of internal rotation is investigated and an analytical espression for the spin-rotational rate of a nucleus attached to the internal rotor is obtained in terms of the internal angular-momentum correlation rime. -4 model of n symmetric-top molecule undergoing anisotropic rotational diffusion is extended to include a modified extended diffusion of internal rotation. The result is applied to liquid toluene and the internal an&x-momentum correhtion time is evaluated from the 13C nuclear spin-rotational relaxation rate of the methyl carbon. A comparison with the previous result on the dipole-dipole relaxation data is made and the consistency of the present theory is discussed.

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