122265-84-3Relevant articles and documents
COMPOUNDS FOR USE IN LIQUID CRYSTAL DEVICES
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Page/Page column 27, (2008/06/13)
Liquid crystal compounds of Formula (I) for use in liquid crystal devices contains a dioxatetralin unit within the mesogenic liquid crystal core. The dioxatetralin unit may be located at any position within the mesogenic core of the liquid crystal compound, either at the terminus of the liquid crystal core or alternatively substantially in the middle of the liquid crystal core. The compounds of the invention exhibit fast switching and may be used in liquid crystal mixtures for particular use in imaging or display media, such as monitors or televisions.
The synthesis and electro-optic properties of liquid crystalline 2- (2,3-difluorobiphenyl-4'-yl)-1,3-dioxanes
Dong, Chu Chuan,Styring, Peter,Goodby, John W.,Chan, Lawrence K. M.
, p. 1669 - 1677 (2007/10/03)
Fifty-six novel alkyl and/or alkoxy disubstituted 2-(2,3- difluorobiphenyl-4'-yl)-1,3-dioxanes (DFBPD) were prepared. Smectic C and nematic mesophases were exhibited by most of the alkyl-alkoxy homologues. Conversely, most of the dialkyl compounds exhibited smectic C, smectic A and nematic phases. The birefringence (Δn), dielectric anisotropy (Δε), spontaneous polarisation and response times of two ferroelectric mixtures formulated from the dioxanyl systems were determined. The birefringence results were compared with eight other groups of mixtures where the materials were based on different core systems. The overall electro-optic properties of the DFBPDs were found to be comparable to the best of the eight most commonly used materials in ferroelectric display devices.
Liquid crystal compounds and compositions
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, (2008/06/13)
Liquid crystal naphtalene compounds, represented by the following formula (1) are disclosed. R-Z-A-NAP-Z?-R? (1)In the formula (1), R is an alkyl group containing 1 to 18 carbon atoms; R? is an alkyl group containing 1 to 21 carbon atoms; NAP represents 2,6-naphthylene group; A, Z and Z? are as follows: 1) A is Pyr> and (a) Z is - or and Z? is O, or (b) Z is - and Z? is COO; 2) if A is Pym>, (a) Z is - and Z? is O, or (b) Z is O and Z? is -, O or ; 3) A is FPhF and (a) Z is - or O and Z? is -, O or COO, (b) Z is OCO and Z? is - or O, or (c) Z is and Z? is O; 4) A is PhF and (a) Z is - or and Z? is O, (b) Z is O and Z? is -, or (c) Z is - and Z? is COO; 5) A is FPh and (a) Z is O and Z? is-, (b) Z is -, O, or OCO and Z? is O, or (c) Z is O and Z? is COO; 6) A is Pyr and Z is -, O or and Z? is O; or 7) A is Ph and one of Z and Z? is - and the other is O; As a component of liquid crystal compositions showing chiral smectic C phase, these compounds can provide liquid crystal compositions of improved orientation and free from zigzag deffects, and liquid crystal display elements of high contrast ratio.