2-Hydroxy-5,5-dialkyl-δ-valerolactone derivatives as chiral dopants for practical ferroelectric liquid crystals
作者:
Keiichi Sakashita,
Tetsuya Ikemoto,
Yuriko Nakaoka,
Fumiko Terada,
Yoshihiro Sako,
Yoshitaka Kageyama,
Kenji Mori,
期刊:
Liquid Crystals
(Taylor Available online 1993)
卷期:
Volume 13,
issue 1
页码: 71-81
ISSN:0267-8292
年代: 1993
DOI:10.1080/02678299308029054
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
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.
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