Antiferroelectric liquid crystals derived from a new optically active (R)-3-ethylmercapto-2-methylpropionic acid
| Autor: | J. J. Liang, F. K. Huang, S.-L. Wu, B. J. Uang, W. J. Tsai |
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| Rok vydání: | 1995 |
| Předmět: |
chemistry.chemical_classification
Chiral auxiliary Materials science General Chemistry Optically active Condensed Matter Physics Phase formation chemistry.chemical_compound Crystallography chemistry Liquid crystal Phase (matter) Organic chemistry Antiferroelectricity General Materials Science Enantiomeric excess Alkyl |
| Zdroj: | Liquid Crystals. 18:715-721 |
| ISSN: | 1366-5855 0267-8292 |
| DOI: | 10.1080/02678299508036681 |
| Popis: | A new optically active (R)-3-ethylmercapto-2-methylpropionic acid has been synthesized using D(-)—2,10-camphorsultam as a chiral auxiliary. The optical purity of the acid obtained was greater than 98 per cent. Its derivatives, (R)-4-(3-ethylmercapto-2-methylpropionyl)phenyl 4′-alkoxybiphenyl-4-carboxylates (EMMPPmBC; m = 7–16), have been prepared for the investigation of liquid crystalline properties as a function of peripheral alkyl chain length. Optical studies showed that all members exhibited an antiferroelectric S∗cA phase. The results also indicate that a lengthened alkyl chain length is favoured for ScA ∗ phase formation. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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