77408-39-0Relevant articles and documents
4(4-Alkyloxybenzoyloxy)-4'-cyanoazobenzenes: A Homologous Series of Liquid Crystals Exhibiting the Unusual Phase Sequence Smectic A - Nematic - Smectic A
Heppke, Gerd,Hopf, Reinhard,Kohne, Bernd,Praefcke, Klaus
, p. 1384 - 1388 (2007/10/02)
The synthesis and the phase transition temperatures of homologous liquid crystalline 4(4-alkyloxybenzoyloxy)-4'-cyanoazobenzenes with alkyl chain length n = 1-12 and n = 16 are reported.All compounds exhibit smectic A phases; the SA phase region being interrupted by a "re-entrant" nematic phase for alkyl chain length n >/= 9. - Keywords: Liquid Crystals, 4(4-Alkyloxybenzoyloxy)-4'-cyanoazobenzenes, Smectic A Phase, Re-entrant Nematic Phase