73329-06-3Relevant articles and documents
PHOTO-CROSSLINKABLE LIQUID CRYSTAL MONOMERS WITH OPTICAL ACTIVITY
-
Page/Page column 2-4, (2012/12/13)
The present invention relates to photo-crosslinkable liquid crystal monomers with optical activity. The liquid crystal monomers contains one chiral center with an acrylate group or terminal diacrylate groups, and terminal dibenzene rings are introduced in order to extend its hard segment for the purpose of getting a wider liquid crystalline phase. By introducing the liquid crystal monomers, the room temperature nematic liquid crystal or the cholesteric liquid crystal may have a better mutual solubility and a wider, steadier structure of liquid crystal. The liquid crystal monomers have the following formula structure:
Long-range chiral induction in chemical systems with helical organization. Promesogenic monomers in the formation of poly(isocyanide)s and in the organization of liquid crystals
Amabilino, David B.,Ramos, Elena,Serrano, José-Luis,Sierra, Teresa,Veciana, Jaume
, p. 9126 - 9134 (2007/10/03)
The preparation of optically active poly(isocyanide)s derived from chiral promesogenic monomers is reported. Remarkably, the stereogenic carbon atom in the monomer is able to pass its chiral 'information' to the growing polymer backbone which is at least
Ferroelectric liquid crystals for nonlinear optics applications
-
, (2008/06/13)
The present invention provides ferroelectric liquid crystal and liquid crystal compounds, among which are compounds which possess large X(2), i.e. second order nonlinear susceptibility and thus make them useful in optical and nonlinear optical applications. The invention includes chiral nonracemic compounds of formula STR1 where one of n or m is 1; k is 1 and B is COO or OOC; R' is a straight-chain or branched alkyl or monoalkene group having from 1 to 20 carbon atoms where one or more of the non-neighboring carbon atoms in R', except any unsaturated carbon atoms, can be replaced with O, S or a Si(CH3)2 group; and R' is a chiral nonracemic tail group selected from the group consisting of --O--C*H(CH3)Rc, --O--C*H(CH3)COORd and --O--CH2 C*HF--C*HF--R6 in which the * indicates an asymmetric carbon enriched in one stereoconfiguration which for --O--CH2 C*HF--C*HF--Re is either the (S,S) or (R,R) stereoconfiguration wherein: Rc is a straight-chain or branched alkyl or monoalkene group having 2 to 15 carbon atoms; Rd is a straight-chain or branched alkyl or monoalkene group having 2 to 13 carbon atoms and Re is a straight-chain or branched alkyl or monoalkene group having 2 to 11 carbon atoms wherein in Rc, Rd or Re one or more non-neighboring carbon atoms, except any unsaturated carbon atoms, can be substituted with an O, S, or Si(CH2)2 group.