200874-72-2Relevant academic research and scientific papers
Chiral Mesogenic Compounds: Carbocyclic and Heterocyclic Schiff Bases
Barbera, J.,Melendez, E.,Serrano, J. L.,Sierra, M. T.,Ezcurra, A.,Jubindo, M. A. Perez
, p. 151 - 158 (2007/10/02)
Five different chiral p-substituted anilines derived from 4-aminobenzoic acid and from 4-aminophenol were condensed with four carbocyclic and heterocyclic aldehydes in order to obtain chiral Schiff bases resembling DOBAMBC and HOBACPC.With the exception of the pyridine-3-carboxaldehyde derivatives, the compounds are mesomorphic.Some of the compounds exhibit ferroelectric SC* phases, and all exhibit SA or Ch mesophases on heating.Benzaldehyde and pyridine-2-carboxaldehyde derivatives show similar mesomorphic behavior, as was to be expected from MNDO semiempirical calculations.Values of the spontaneous polarization of certain compounds were measured.
EFFECT OF CHAIN BRANCHING ON MESOMORPHISM IN BROAD MOLECULES.
Dave,Kurian,Patel,Prajapati
, p. 311 - 317 (2007/10/02)
Two new homologous series of Schiff's bases were synthesized. The method of preparation and the liquid crystalline properties of these compounds are described. Both series are nematogenic; the smectic phase is absent even in higher members of the series. In series I, the C//2 and C//3 homologue exhibit two solid modifications. The influence of branching in the end alkoxy groups of these compounds on the mesomorphism is discussed. The mesomorphic properties of these compounds are compared with those of related compounds.
