117736-08-0Relevant academic research and scientific papers
Liquid crystalline compounds based on 1,4-disubstituted but-1-YNE
Dabrowski,Dziaduszek,Szczucinski,Parka
, p. 201 - 215 (2007/10/02)
Liquid crystalline compounds containing the -CH2CH2-C ≡ C- inter-ring linkage between cyclohexane and benzene rings belonging to four homologous series have been prepared. Their mesogenic, viscous, dielectric, optical, and dielectrooptical properties were investigated and compared with the properties of analogous compounds with the -CH2CH2- or -C ≡ C- bridge groups. The mesogenic and physical properties of the compounds with the -CH2CH2-C ≡ C- linkage group are intermediate between properties of the compounds with -C ≡ C- and the properties of the compounds with -CH2CH2- group, except that their clearing points are lower and viscosity is higher.
Halobenzene liquid crystals
-
, (2008/06/13)
Compounds of the formula STR1 wherein X1 denotes fluorine or chlorine and X2 denotes hydrogen, fluorine or chlorine; R1 is 3E-alkenyl, 4-alkenyl, 2E-alkenyloxy or 3-alkenyloxy; n stands for the number 0 or 1; one of the groups Y1 and Y2 is a single covalent bond, --COO--, --OOC--, --CH2 CH2 --, --CH2 O-- or --OCH2 -- and the other of the groups Y1 and Y2 is a single covalent bond; and rings A1 and A2 each individually are substituted or unsubstituted trans-1,4-cyclohexylene, in which optionally 2 non-adjacent CH2 groups are replaced by oxygen, or substituted or unsubstituted 1,4-phenylene, in which optionally 1 CH group or 2 CH groups is/are replaced by nitrogen; with the proviso that X2 denotes fluorine or chlorine and/or Y1 or Y2 denotes --CH2 O-- or --OCH2 -- when simultaneously X1 is fluorine and R1 is 3E-alkenyl, and their use for liquid crystalline mixtures and electro-optical purposes.
