Rp. Tuffin et al., TILTED LAYERED PHASES - THE INFLUENCE OF THE INCLUSION OF A NONLINEARMACROCYCLE IN CALAMITIC LIQUID-CRYSTALS - SYNTHESIS AND PHASE-BEHAVIOR, Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals, 304, 1997, pp. 223
This paper describes the synthesis and the characherisation of the pha
se behaviour of a homologous series based on the macrocycle 1,7-diaza-
4,10,13-tri-oxa-cyclopentadecane. The mesogenic units attached to the
two aza-groups consist of three aromatic rings and the length of the t
erminal chain is varied between six and sixteen methylene groups. Thre
e different types of tilted smectic phases were observed which are bel
ieved to differ in their layer packing in that one may have aligned ti
lt (normal smectic C) and the other two may have alternating tilt.