844697-10-5Relevant academic research and scientific papers
Kinetically induced intermolecular association: Unusual enthalpy changes in the nematic phase of a novel dimeric liquid-crystalline molecule
Yoshizawa, Atsushi,Yamaguchi, Akihisa
, p. 2060 - 2061 (2002)
A novel dimeric liquid-crystalline molecule in which two mesogenic groups are connected via catechol was found to have smectic-like layer ordering in the nematic phase, and unusual enthalpy changes were observed in the nematic phase on heating from the mo
Topological effect in dimeric liquid crystals
Yoshizawa,Kawaguchi
, p. 97/[1963]-105/[1971] (2005)
We have prepared some new dimeric liquid crystals in which two phenylpyrimidine moieties are connected via (±)-trans-1,2-cyclohexanediol or p-toluenesulfon amide and investigated the transition behaviour. (±)-trans-1,2-Bis(6-[4-(5-octylpyrimidin-2-yl)phen
Synthesis and phase transition behavior of novel liquid crystal tetramers
Narumi, Tsuyoshi,Yoshizawa, Atsushi,Yamamoto, Jun,Takanishi, Yoichi
experimental part, p. 263 - 273 (2011/08/02)
We synthesized novel liquid crystal tetramers possessing cyanobiphenyl and phenylpyrimidine moieties, and investigated their phase transition behavior. The liquid crystal tetramers exhibited nematic (N) and smectic A (SmA) phases. X-ray diffraction measurements suggest that the SmA phase has an intercalated structure. We discuss the transition behavior of the newly designed tetramers in terms of their molecular shape. Copyright Taylor & Francis Group, LLC.
Unusual smectic phases organized by novel λ-shaped mesogenic molecules
Yamaguchi, Akihisa,Nishiyama, Isa,Yamamoto, Jun,Yokoyama, Hiroshi,Yoshizawa, Atsushi
, p. 280 - 288 (2007/10/03)
A homologous series of novel λ-shaped mesogenic compounds in which three mesogenic groups are connected to 3, 4-dihydroxybenzoic acid has been prepared and their physical properties investigated by means of optical microscopy, differential scanning calorimetry and X-ray diffraction measurements. The λ-shaped compounds studied showed unusual smectic phases. 4-Cyanobiphenyl-4′-yl 3,4-bis{6-[4-(5-octylpyrimidin-2-yl) phenyloxy]hexyloxy}benzoate was found to realize an incommensurate SmA (SmAinc) phase. A "uniform planarly" aligned sample of 2-(4-octylphenyl) pyrimidin-5-yl 3,4-bis{6-[4-(5-octylpyrimidin-2-yl)phenyloxy]hexyloxy} benzoate showed a Schlieren-like texture in the smectic phase. We discuss structural effects of the λ-shaped compounds on molecular organization in liquid-crystalline phases.
Influence of the alkyl spacer length on the phase transition behaviour of the Λ-shaped liquid crystal
Yamaguchi, Akihisa,Yoshizawa, Atsushi,Nishiyama, Isa,Yamamoto, Jun,Yokoyama, Hiroshi
, p. 85/[1951]-95/[1961] (2007/10/03)
We reported that a novel λ-shaped liquid-crystalline molecule 1-6 in which a cyanobiphenyl and two phenylpyrimidine groups are connected to 3, 4-dihydroxy-benzoic acid exhibits an incommensurate SmA phase. In the present study, we have prepared the homolo
