Dielectric Relaxation of Dilute Solutions in the Millimeter Wave Region

Abstract

The dielectric losses of benzophenone, diphenylether, diphenylamine, chlorobenzene, and aniline, measured at 12.33, 6.19, 3.08, and 2.47 mm wavelength in dilute benzene solutions, have been found to fit Debye type relaxation curves within the limits of experimental error. The distinctly lower relaxation time of diphenylether and of diphenylamine, compared to the one for benzophenone, can be explained by a high internal mobility of the phenyl rings in these two molecules. Similarly, the mobility of the amino group in aniline results in a decrease of the relaxation time, compared to the rigid chlorobenzene molecule.