Synthesis of 4-Alkyl-2′′, 3′′ difluoro terphenyl nitrile using coupling reactions

► 4-Alkyl-2′′, 3” difluoro terphenyl chiral dopants are synthesised. ► Convergent approach was applied to synthesis chiral dopants. ► Mixture of 4-Alkyl-2”, 3” difluoro terphenyl nitrile in achiral host mixture HM1 and LM3 generate ferroelectric liquid crystal properties. ► Ferroelectric properties were found to be dependent upon the lengths of the alkyl chain attached to chiral dopant.