中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
4-正己氧基苯甲醛 | 4-(hexyloxy)benzaldehyde | 5736-94-7 | C13H18O2 | 206.285 |
2,4-二羟基苯甲醛 | 2,4-Dihydroxybenzaldehyde | 95-01-2 | C7H6O3 | 138.123 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | N-[4-(hexyloxy)-2-hydroxybenzylidene]-N'-(4-hexyloxybenzylidene) azine | 1353288-18-2 | C26H36N2O3 | 424.583 |
First examples of smart bent-core materials that exhibited frustrated structures with high polar order and thermochromism.
A series of Schiff base hydroxy-mesogens and their model compounds have been synthesized. The mesogen is constructed from three-ring-containing mesogens linked through ester and azomethine groups with a terminal hydroxy group. The related model compounds were also synthesized with varying chain length with a terminal methyl group and their properties were compared with that of hydroxy mesogens. Extensive characterization of all mesogenic compounds was carried out by Fourier-transform IR, 1H and 13C NMR and mass spectroscopy. The phase characteristics such as nature of phase, melting and clearing temperatures and phase range were evaluated using a hot-stage optical polarizing microscope and differential scanning calorimetry. The appearance of enantiotropic smectic phases is due to the high molecular polarizability of the triaromatic core with azomethine and ester linkages.