Synthesis and characterisation of novel alkoxycyanobiphenyl-substituted rufigallols

Abstract

Microwave-assisted synthesis of novel alkoxycyanobiphenyl-substituted rufigallols are reported by systematically replacing one, two, four, five or six cyanobiphenyl-tethered alkoxy chains. The synthesis of the target compounds was challenging since classical reactions failed to produce these hybrids. Chemical structures of the hybrids were determined by ¹H nuclear magnetic resonance (NMR), ¹³C NMR, infrared, ultraviolet spectroscopy and elemental analysis. The thermotropic liquid crystalline properties of the new compounds were investigated by polarising optical microscopy, differential scanning calorimetry and X-ray diffractometry.

Keywords:

• Liquid crystals
• rufigallol
• cyanobiphenyl
• oligomer
• disc–rod hybrids
• microwave-assisted synthesis