New fluorescent mesogens with a chalcone central linkage

Abstract

Mesogens with a chalcone central linkage are rare. It is believed that the chalcone linkage is not conducive to mesomorphism. In the present study two homologous series were synthesized having the chalcone as a central linkage. 4-n-alkoxy-4′-hydroxy chalcones do not exhibit mesomorphism, however, higher members of 4-n-alkoxy-4′(4″-n-octyloxybenzoyl) chalcones, exhibit mesomorphism. The fluorescent behaviour of the chalcones is evaluated. All the compounds are characterized by standard methods.