Mesogenic properties of chiral compounds derived from 2(S)-[2(S)-ethylhexyloxy] propionic acid and its (S, R)-diastereomer

Autor:	Jin-Mei Wu, Pao-Swu Cheng, Yu-Kai Lin, Wen-Liang Tsai, Jung-Hui Chen
Rok vydání:	2003
Předmět:	Biphenyl Materials science Mesogen Diastereomer Substituent General Chemistry Condensed Matter Physics Ring (chemistry) chemistry.chemical_compound Crystallography chemistry Liquid crystal Phase (matter) Organic chemistry General Materials Science Methyl group
Zdroj:	Liquid Crystals. 30:355-358
ISSN:	1366-5855 0267-8292
DOI:	10.1080/026782903100008373
Popis:	Two acids, 2(S)-[2(S)-ethylhexyloxy] propionic acid and 2(S)-[2(R)-ethylhexyloxy] propionic acid, were used as the chiral building block for the preparation of four liquid crystals 5, 6, 7 and 8. The diastereomers of the biphenyl ring system, 5 and 6, possess the phase sequence I-N* -SmC* -Cr1-Cr2, while the diastereomers of the naphthalene ring system, 7 and 8, exhibit the sequence I-SmA-SmC* -Cr. The temperature ranges of the SmC* phase for 5 and 6 are wider than those for 8 and 8 ; the phase transition temperatures of the SmC* phase for 7 and 8 are lower than those for 5 and 6. In the case of the diastereomers of naphthalene ring system, the larger the size of the lateral substituent at the second chiral centre, i.e. ethyl or methyl group, the wider the temperature range of the SmC* phase.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::d39cbe7b01b59f57881f04d31193762b https://doi.org/10.1080/026782903100008373 Zobrazit plný text záznamu