This paper des
cribes the synthesis and liquid-
crystalline properties of the homologous series of 4-heptyloxybenzylidene-4?alkyloxyanilines (7-
n). Six of them are presented for the first time. Based on the polarization mi
cros
copy (POM and TOA methods) and the
calorimetri
c (DSC) measurements following polymorphism has been dete
cted: nemati
c, sme
cti
c C and sme
cti
c I mesophases. The presen
ce of these mesophases was
confirmed by the mis
cibility method, using 4-o
ctyloxyphenyl 4-nitrobenzoate and terephtal-bis (4-butyloaniline) as a mesophase referen
ces.
Extraordinary results have been found in the mixtures of the investigated compounds with 4-octyloxyphenyl 4-nitrobenzoate; Induced smectic A has been observed, which is connected with very strong intermolecular interactions. Additionally destabilization of nematic and smectic C phases was visible.