Solute-Solvent Chiral Interactions: Non-Symmetrical Effects of Enantiomers and Conformers on Right- and Left-Handed Cholesterics
作者:
Y.K. Yarovoy,
M.M. Labes,
期刊:
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals
(Taylor Available online 1995)
卷期:
Volume 270,
issue 1
页码: 101-112
ISSN:1058-725X
年代: 1995
DOI:10.1080/10587259508031020
出版商: Taylor & Francis Group
关键词: Cholesteric;chiral;conformer;enantiomers;helix;pitch
数据来源: Taylor
摘要:
Effective helical twisting powers of a number of enantiomers and achiral conformers were measured in highly twisted cholesteric phases varying in both chemical composition and macroscopic chirality. In certain solute-solvent combinations, and particularly in steroidal solvents, pronounced non-symmetric effects of enantiomers and conformers were observed on right- and left-handed cholesterics. Achiral rod-like solutes, which can exist in different conformations, were found to behave as though they have a left-handed helical twisting power in both right- and left-handed short pitch steroidal cholesterics. All effects can be interpreted as being due to specific short range molecule-molecule interactions. No evidence was found that the macroscopic chirality of a cholesteric medium can influence the conformation of an achiral solute.
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