Zusätzliche dielektrische Verluste starrer, polarer Moleküle in verdünnter Lösung bei Frequenzen oberhalb des Maximums der Debye-Absorption / Additional Dielectric Loss of Rigid Polar Molecules in Dilute Solutions at Frequencies in the Far Infrared [FIR

Abstract

Abstract The dielectric loss of ten polar molecules in dilute solutions has been measured in the 0.3 GHz to 300 GHz range. Besides the Debye-absorption of the polar molecules, in all solvents, i.e. heptane, cyclohexane, mesitylene and decalin there could be separated an additional part of dielectric loss in the range of mm-waves. This absorption has been approximated by a Debye-curve to gain the step of dispersion and the time-constant. The dielectric loss of the unpolar solvents themselves, which is due to collision induced dipole moments, has also been investigated. The results are discussed and compared with the FIR-absorption of the polar molecules.