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Temperature dependence of the rotational relaxation times of aniostropic molecules in neat and mixed binary liquids

✍ Scribed by P.O. Ho; R.R. Alfano

Publisher
Elsevier Science
Year
1977
Tongue
English
Weight
682 KB
Volume
50
Category
Article
ISSN
0009-2614

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✦ Synopsis

The relaxation hmes of the opticat Kerr effect of rli~o~n~ene and in-nitrotoiue~e have been measured a$ Q function of tcmpcrature in neat and ntired bmmy liquids. The activation energy of molecular reorientation motion for various solutions 1~s been determined from Kerr effect and viscosity mexarcments. A modified Hill theory for the relaxation times provides sutbfxtory agreerncnt with the expcrirnental measurements for the mixed liquids. * Support in part by gants from NW-GH 41812, CUNY FRAP and Dr. Iiarry E. Dubin Fund. ** in patal f&t-tient of Ph. 0. degree in Physics. 5 Alfred Sloan Fellow. $$ Just like the relaxation time obtained from the depolarized Rayleigh wing linewidth [6], the Kerr rotatIonal relaxation time is a combination of the rotations about the individual axis of the mo!eculcs. The rekantion time i\ more strongiy weighted by the orientation about the axis which is associated with ttw iargest polari7ability change upon rotation 161.

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