New 2,2'-substituted 4,4'-dimethoxy-6,6'-dimethyl[1,1'-biphenyls], inducing a strong helical twisting power in liquid crystals.
Based on the stabilisation of the molecular motion by the chiral residue, novel optically active biphenylic chiral dopants for nematic liquid crystals were developed. This molecular congestion was obtained by introducing mesogenic residues on the 2,2'-positions of the chiral biphenyl; this led to a novel molecular architecture that was found to be efficient. The synthesised optically active biphenyls were characterised with very short cholesteric pitches when used as chiral dopants in nematic liquid crystals. The synthesis of the enatiomerically pure biphenyl dopants and their preliminary physicochemical characterisations are described.
Laboratoire de stéréochimie associé au CNRS, URA 7008, Université Louis Pasteur, ECPM, 25 rue Becquerel, 67087 Strasbourg 2, France.
Richard
R
Holzwarth
Richard
R
Bartsch
Zoubair
Z
Cherkaoui
Guy
G
Solladié
D001713:Biphenyl Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D002614:Chelating Agents / Q000138:chemical synthesis* / Q000737:chemistry; D003460:Crystallization; D008968:Molecular Conformation; D013237:Stereoisomerism
D001713:Biphenyl Compounds; D002614:Chelating Agents