2-Hydroxy-5,5-dialkyl-δ-valerolactone derivatives as chiral dopants for practical ferroelectric liquid crystals

Autor:	Fumiko Terada, Kenji Mori, Yoshitaka Kageyama, Yuriko Nakaoka, Yoshihiro Sako, Keiichi Sakashita, Tetsuya Ikemoto
Rok vydání:	1993
Předmět:	chemistry.chemical_classification Valerolactone Materials science Dopant General Chemistry Condensed Matter Physics Ring (chemistry) Ferroelectricity Crystallography chemistry Liquid crystal Phase (matter) Proton NMR Organic chemistry General Materials Science Alkyl
Zdroj:	Liquid Crystals. 13:71-81
ISSN:	1366-5855 0267-8292
DOI:	10.1080/02678299308029054
Popis:	2-Hydroxy-5,5-dialkyl-δ-valerolactone derivatives have shown interesting properties as a chiral dopant for ferroelectric liquid crystals. In small amounts these compounds induce high magnitudes of spontaneous polarization and long helical pitches in the chiral nematic phase (N*). Alkyl chains attached at the C-5 position play an important role in these properties. Here we discuss the stereochemistry and ferroelectric properties of these lactones and compare them with those of 2-hydroxy-5-alkyl-δ-valerolactone derivatives reported previously. The ring structure of 5,5-dialkyl-δ-valerolactone is found to be a rigid ‘pseudo-chair’ conformation by *H NMR studies.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::172d95aafc7966a18137588118eee758 https://doi.org/10.1080/02678299308029054 Zobrazit plný text záznamu