Properties of the liquid crystals formed by certain 4′-n-alkylbiphenyl-4-yl 5-n-alkylthiophene-2-carboxylates
| Autor: | D. J. Byron, Avtar S. Matharu, Jane L. Butcher, R. C. Wilson |
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| Rok vydání: | 1995 |
| Předmět: |
Materials science
General Chemistry Condensed Matter Physics Miscibility law.invention Homologous series chemistry.chemical_compound Crystallography Differential scanning calorimetry chemistry Optical microscope Polymorphism (materials science) law Liquid crystal Organic chemistry General Materials Science Thermal stability |
| Zdroj: | Liquid Crystals. 19:387-396 |
| ISSN: | 1366-5855 0267-8292 |
| DOI: | 10.1080/02678299508031996 |
| Popis: | Thirty compounds, ten members of each of three homologous series of esters derived from 4-hydroxy-4′-n-octyl-, -nonyl-, and -decyl-biphenyl and the 5-n-alkylthiophene-2-carboxylic acids (methyl through to decyl homologues) have been prepared. The liquid crystal properties of these esters, which show extensive smectic polymorphism, have been investigated by thermal optical microscopy, differential scanning calorimetry, and miscibility studies. Four members of the corresponding 4-n-alkylbenzoates have also been prepared in order to compare their liquid crystal behaviour with the 5-n-alkylthiophene-2-carboxylate counterparts: both smectic and nematic thermal stability are higher for the 4-n-alkylbenzoates, by 30.6° and 36.8° C, respectively. |
| Databáze: | OpenAIRE |
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