Mesomorphic properties of three-benzene-ring containing bent-core liquid crystals 1,3-phenyIene-bis4-(aIkylcarboyloxyl)benzyiideneamine

摘要

A homologous series of three-benzene-ring containing bent-cores compounds l,3-phenylene-bis[4-(alkylcarboyloxyl)benzylideneamine] were synthesized. In these molecules the terminal ester chains CH_3(CH_2)_n-2COO-, where n was the number of carbon atoms in the terminal chains, were linked to the central three-benzene-ring containing bent-core. As n changed from 1-12, the melting temperatures and clearing points were in the high temperature ranges of 136-206°C. As n changed in the range of 14-19, the melting temperatures and clearing points were dramatically dropped in a low temperature ranges 60-82°C.