Stabilization and Destabilization of Liquid Crystalline Phases by Hydrogen Bondings

Abstract
Stabilization and destabilization of liquid crystalline phases in mixtures of derivatives of phenol and cyclohexanole with pyrrolidines and pyridines were investigated by phase diagrams. Whereas in mixtures with pyrrolidines a strong destabilization of the liquid crystalline state was found, mixtures with pyridines stabilize LC phases. The results are interpreted by 1:1 associates formed by hydrogen bridges and the molecular shape of these complexes.