2-HYDROXY-5,5-DIALKYL-DELTA-VALEROLACTONE DERIVATIVES AS CHIRAL DOPANTS FOR PRACTICAL FERROELECTRIC LIQUID-CRYSTALS

被引:14
作者
SAKASHITA, K
IKEMOTO, T
NAKAOKA, Y
TERADA, F
SAKO, Y
KAGEYAMA, Y
MORI, K
机构
[1] MITSUBISHI RAYON CO LTD,CENT RES LAB,OTAKE 73906,JAPAN
[2] UNIV TOKYO,DEPT AGR CHEM,BUNKYO KU,TOKYO 113,JAPAN
关键词
D O I
10.1080/02678299308029054
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
2-Hydroxy-5,5-dialkyl-delta-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-delta-valerolactone derivatives reported previously. The ring structure of 5,5-dialkyl-delta-valerolactone is found to be a rigid 'pseudo-chair' conformation by H-1 NMR studies.
引用
收藏
页码:71 / 81
页数:11
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