93144-80-0Relevant articles and documents
Dicationic imidazolium-based ionic liquids and ionic liquid crystals with variously positioned fluoro substituents
Li, Xiaoju,Bruce, Duncan W.,Shreeve, Jean'Ne M.
experimental part, p. 8232 - 8238 (2010/06/16)
A series of new dicationic imidazolium-based organic salts bearing fluoro substituents on the bent-core unit and/or linker benzene-ring positions has been synthesized and characterized. The properties of these salts, including transition and decomposition temperatures, and density were determined, indicating that their performance is strongly dependent on the positions of the fluoro substituents, the number of carbon atoms in the alkyl group, and the anion present. Examination by polarized optical microscopy showed that the four salts (compounds 4c, 7a, 7b and 8b, where the alkyl group was C 12H25-) were mesomorphic and these data were supported by DSC measurements.
Synthesis and mesomorphic properties of some fluoro-substituted benzoates
Yang,Tang,Gong,Wen
, p. 153 - 165 (2007/10/03)
Several series of fluoro-substituted benzoate liquid crystals have been synthesized. The results showed that the SmA phase is enhanced with the increasing of the degree of fluoro-substitution on the para- and meta-position of the terminal phenyl groups. And the molecules which have same molecular structural formula show nearly the same melting points. It is also discussed about the effect of the ester bond's direction on the mesomorphic properties.
Liquid crystal compounds and optically active compounds
-
, (2008/06/13)
A compound usefull for liquid crystal component which is represented by the following formulas (1), (2), (3), or (4) ;, R1 -X1 -A1 -( A2 )n-Y1 -A3 -X2 -R2 (1), R1 -X1 -( A3 -Y1 )N-A1 -A2 -X2 -R2 (2), R3 -X1 -A4 -Y1 -A3 -X2 -R4 (3), R3 -X1 -A5 -Y1 -A1 -A2 -X2 -R4 (4), wherein R1 ,R2 ,R3 and R4 are C1 18 alkyl groups; X1 and X2 is -, O, S, -C≡C- or divarent groups such as COO, OCO, CH2 O or OCH2