Dielectric spectroscopy of binary liquid systems as prototypes for interactions in Biological systems

While dielectric spectroscopy is useful in understanding weak molecular interactions such as hydrogen bonds in biological systems, the large number of interactions and the mean field data obtained lead to ambiguities in interpretation of the results. The study of weak interactions in small molecule prototypes is one way to reduce this problem. The fact that weak molecular interactions are short-ranged, and hence they depend mainly on the bonding atoms and not on the whole molecule is the philosophy of this method. In this paper, we present the results of dielectric studies of three liquids namely diethylamine, ethanolamine and propan-1-ol. These three liquids are easily available off the shelf. Binary systems of diethylamine (C4H11N)/ethanolamine (C2H7NO), diethylamine/propan-1-ol (C3H9O) and ethnolamine/propan-1-ol were prepared over the entire concentration region in steps of 10% concentration variation. Dielectric studies from 0.4 GHz Hz to 20 GHz using the coaxial probe technique. An Agilent PNA E 8361C was used for this purpose.