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Mesogenic Properties of 5-Cyanotropolone and 2-Amino-5-Cyanotropone Derivatives |
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| Authors: | Masashi Hashimoto Seiji Ujiie Akira Mori |
| Affiliation: | 1. Graduate School of Engineering Sciences, 39, Kyushu University , Kasuga-koen, Kasuga, Fukuoka , 816-8580 , Japan;2. Department of Material Science, Interdisciplinary Faculty of Science and Engineering , Shimane University , Matsue, 690-8504 , Japan;3. Institute of Advanced Material Study, 86, Kyushu University , Kasuga-koen, Kasuga, Fukuoka , 816-8580 , Japan |
| Abstract: | Abstract New 5-cyanotroponoid liquid crystals with a 3,4-dialkoxybenzoyloxy and a 3,4-dialkoxybenzoylamino substituent at the C-2 position were prepared. These derivatives exhibited interdigitated bilayer smectic A phases while the corresponding benzenoids were non-mesogenic. Thermal stabilities of these troponoids were lower than those of 2-(4-alkoxybenzoyloxy)-5-cyanotropones and 2-(4-alkoxybenzoylamino)-5-cyanotropones. |
| Keywords: | 5-Cyanotroponoid liquid crystals Forked mesogen X-Ray diffraction study Interdigitated bilayer smectic A phases |