343956-74-1Relevant 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.
Synthesis and physical properties of novel liquid crystals containing 2,3-difluorophenyl and 1,3-dioxane units
Sun, Gui-Xiang,Chen, Bing,Tang, Hong,Xu, Shou-Yi
, p. 742 - 748 (2007/10/03)
Three series of liquid crystalline materials have been synthesized: 2-(2,3-difluoro-4-alkoxyphenyl)-5-(4-alkylphenyl)-1,3-dioxanes (m,On-DFPPD), 2-(2,3-Difluoro-4-alkoxyphenyl)-5-(2-fluoro-4-alkylphenyl)-1,3-dioxanes (m,On-DFPFPD) and 2-(2,3-Difluoro-4-al
