抄録
25, 26, 27, 28-Tetrapropoxy-5, 11, 17,23-tetrakis(4-dodecytexyphenyl-yn)calix[4]arene was synthesized and studied on their mesomorphic phase transitions. It was found that these compounds show both a thermotropic and lyotropic properties. For the thermotropic phase transkion, the compound melts at 54℃ into isotropic phase. But the formation of viscous state with birefringence on cooling takes so long time and a mesophase was obtained under annealing condkion at 40-70℃ leading to developing hexagonal columnar phase which is crystallized at 40℃. This slow development of columnar mesophase is probably due to the diffculty for molecular stacking to form columns. This compound also shows lyotropic lametla and hexagonal phases by the addition of hexane and acetone.
