0000000000964581
AUTHOR
Qingbing Wang
Shape-persistent V-shaped mesogens—formation of nematic phases with biaxial order
A homologous series of shape-persistent V-shaped molecules has been designed to form the biaxial nematic phase. Phenyleneethynylene moieties are attached to a bent fluorenone unit to create an apex angle of about 90°, which is determined from the single crystal structure. Two mesogens, one symmetric and another unsymmetric, have been synthesized by attaching a cyano group to one or both of the peripheral phenyl units, respectively. These groups introduce local dipoles essential for the formation of the nematic phases. The tendency to form a crystalline phase is reduced by laterally substituted hexyloxy chains which allow the nematic phase to be supercooled to a glassy state. Two of the thre…
CCDC 294987: Experimental Crystal Structure Determination
Related Article: M.Lehmann, Shin-Woong Kang, C.Kohn, S.Haseloh, U.Kolb, D.Schollmeyer, QingBing Wang, S.Kumar|2006|J.Mater.Chem.|16|4326|doi:10.1039/b605718g