We prepared a series of isoregic chiral smectic polyesters based on (R)-(-)
-4'-(omega-[2-(p-hydroxy-o-nitrophenyloxy)-1-propoxy]-1-alkyloxy)-4-bipheny
lcarboxylic acid, The head-to-tail (p-hydroxybenzoic acid) type monomers en
able us to proceed the isoregically controlled polycondensation. All the mo
nomers exhibited the chiral smectic C and nematic mesophases. The isoregic
chiral smectic polyesters have good thermal stability and exhibit monolayer
ed chiral smectic C and smectic A structures.