75552-39-5Relevant articles and documents
Mesogenic, optical, and dielectric properties of 5-substituted 2-[12-(4-pentyloxyphenyl)-p-carboran-1-yl] [1,3]dioxanes
Nagamine, Takashi,Januszko, Adam,Kaszynski, Piotr,Ohta, Kiminori,Endo, Yasuyuki
, p. 3836 - 3843 (2007/10/03)
Two homologous series of carborane-containing dioxanes 1[n] and 2[n] (n = 1-10) were prepared and their mesogenic properties investigated. All compounds exhibit nematic behavior and three members of series 2[n] show an E phase. Numerical analysis of the clearing temperatures gave a limiting value T NI(∞) of 89 °C for series 2[n] and indicated conformational flexibility of the dioxane ring. Investigations of three-ring derivative 1[4] gave Δn = 0.17, S = 0.53, and Δε = +0.4 ± 0.1 at 85 °C. Extrapolation of dielectric data for dilute solutions of 1[4] in 6-CHBT gave Δε = +0.4 ± 0.25 at 24 °C. Modelling of dielectric results with the Maier-Meier equation demonstrated that conformers with a higher β angle are preferred, which is consistent with conformational selection for the most elongated conformers. The Royal Society of Chemistry 2006.
A new series of liquid crystals having a terminal carbonyl group
Okamoto, Hiroaki,Okamoto, Tsuyoshi,Takenaka, Shunsuke
, p. 1040 - 1041 (2007/10/03)
Some homologs of 5-(4-alkoxyphenyl)-1,3-dioxan-2-one exhibit a monotropic smectic A phase commencing from the pentyloxy homolog.
A New Series of Liquid Crystalline Materials containing Boron Atoms
Seto, Koji,Takahashi, Shigetoshi,Tahara, Tadasu
, p. 122 - 123 (2007/10/02)
The dioxaborinane derivatives, which were synthesized by a method including a new Pd-catalysed coupling reaction, form mesomorphic phases in a wide temperature range, and provide a new series of liquid crystalline compounds containing a boron atom in the
Liquid-crystalline Heterocycloalkanes. I. Synthesis and Properties of Substituted 1,3-Dioxanes
Vorbrodt, H.-M.,Deresch, S.,Kresse, H.,Wiegeleben, A.,Demus, D.,Zaschke, H.
, p. 902 - 913 (2007/10/02)
The synthesis of 2,5-disubstituted 1,3-dioxanes is described, their melting and clearing points and their physical properties (dielectric anisotropy, viscosity, transition enthalpies, optical birefringence) are investigated.The cyano substituted 1,3-dioxanes 5 and 7 are valuable materials for application in displays.