Synthesis and Mesomorphic Studies of a Series of Liquid Crystalline 2-(4-Alkylphenyl)-6-Methoxyquinolines

Abstract

This study describes the novel synthesis of a homologous series of quinoline-containing liquid crystalline 2-(4-alkylphenyl)-6-methoxyquinolines (nPQOMe, n = 4–8) compounds. Preparation of these compounds was completed in the overall two-step reaction and fair to good yields (47–60%) were obtained. Thermotropic behaviors of these liquid crystalline compounds were investigated using differential scanning calorimetry and polarized optical microscopy. Liquid crystals of these 2-(4-alkylphenyl)-6-methoxyquinolines display only nematic phase.

Keywords:

• liquid crystals
• quinoline-containing compounds
• synthesis
• thermal analysis

ACKNOWLEDGMENTS

Financial support of our work by the office of research and development of Fu Jen Catholic University is gratefully acknowledged.

Notes

^a Isolated yields are based upon after recrystalization.

^a Cr = crystalline phase, N = nematic phase, I = isotropic phase.