91577-99-0Relevant academic research and scientific papers
New series of 4-(4'-octyloxybiphenyl-4-yloxymethyl)benzoic acid derivatives with mesogenic properties
Szydlowska, Jadwiga,Pociecha, Damian,Gorecka, Ewa,Kardas, Dorota,Mieczkowski, Jozef,Przedmojski, Jan
, p. 361 - 369 (2007/10/03)
Three homologous series of (4'-octyloxybiphenyl-4-yloxymethyl) benzoic acid derivatives were synthesised and studied. The compounds, substituted by n-alkyl esters, reveal strong discrimination of the tilted phases formation upon elongation of the alkyl gr
Ferroelectric liquid crystal compounds and liquid crystal compositions
-
, (2008/06/13)
The present invention is characterized by a smectic liquid crystal compound represented by the following formula: STR1 wherein R is selected from alkyl and alkoxy groups; X from STR2 m and n are natural numbers; and R* is an optically active group containing an asymmetric carbon atom, and a liquid crystal composition containing said compound as a component. This compound is excellent in optical stability and high-speed response.
Cyano and Nitrobenzyloxy Derivatives: New Polymorphism Aspects
Tinh, Nguyen Huu,Gasparoux, H.,Destrade, C.
, p. 271 - 294 (2007/10/02)
Several polar molecules with three benzene rings and having the general formula: have been synthesized.All these compounds are built with the flexible -CH2O- linkage and provide rather low temperature mesomorphic phases easily accessible for physical investigations.The striking features of these six series are: The cyanobiphenyl series provides a rather classical polymorphism. The nitrobiphenyl series shows another example of the re-entrant nematic phase and furthermore a very spectacular transition Nre -> SG or H with complex spatial structuring. The cyanobenzoate series provides examples of the so-called SA1, AAd, SA2, S phases and also an interesting SAd-SA2 transition directly observable under the microscope. The nitrobenzoate series not only exhibits a classical re-entrant nematic phase, but also the inverted sequence K N SA I in a pure compound. The cyano-Schiff's base series presents the first example of a SB hexatic phase in polar systems. The nitro-Schiff's base series not only exhibits a new enantiotropic re-entrant sequence K SF SC Nre SA N I, but also the first example of the SF phase in polar compounds and the inverted sequence K SF SC N SA I.
