Reversals in Bulk Chirality in a Chiral Nematic Amphiphilic Liquid Crystal Associated with Acylated Proline and Thiaproline
作者:
Keith Radley,
GarethJ. Lilly,
PreyasR. Patel,
HardarshanK. Cheema,
ZuridahM. Rais,
期刊:
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals
(Taylor Available online 1995)
卷期:
Volume 268,
issue 1
页码: 107-119
ISSN:1058-725X
年代: 1995
DOI:10.1080/10587259508030999
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
Chiral detergents derived from the acylation of naturally occuring amino acids have been synthesised. These detergents have been used as chiral dopants with the achiral host potassium laurate (KDD). A correspondence has been found between the molecular stereochemistry in the micelle surface and the resulting bulk chirality. The chiral dopants potassium hexadecanoyl-L-proline (L-KHDP) and potassium hexadecanoyl-L-thiaproline (L-KHDTP) with the host achiral KDD were found to cause inversions in the sense of the twist, abnormal to the general case. These inversions in sense of twist were interpreted as originating from the compensation averaging of the cis-trans molecular conformations, derived from the rotation of the consituents about the C-N peptide bond. NMR evidence is presented to support this assertion.
点击下载:
PDF (608KB)
返 回