| abstract |
The invention describes nematic compositions for electrooptical devices for modulation of the transmitted or incident light and for the rendition of numbers, symbols and images as orientation in the spectroscopy and gas chromatography. The compositions comprise, liquid crystalline compounds such as dyestuffs and at least one of the compound having the following general formula: <IMAGE> +TR <IMAGE> wherein R1 = CnH2n+ 1 , n = 1 to 9 R2 = CnH2n+ 1, CnH2n+ 1O, CnH2n+ 1COO, CnH2n+ 1OCOO, n = 1 to 9 CNCl, Br, C2H4CN <IMAGE> R3 = H, CH3, C2H5, Cl, Br, CN, CH2CH +TR R4 = CnH2n+ 1, CnH2n+ 1O n = 1 to 9. |