Inositol Liquid Crystals, X-Ray Diffraction Studies of Their Hydrogen-Bond Supported Supramolecular Mesophases(1)

被引：35

作者：

Praefcke, K. ^{[1
]}

Marquardt, P. ^{[1
]}

Kohne, B. ^{[1
]}

Stephan, W. ^{[1
]}

Levelut, A. -M. ^{[2
]}

Wachtel, E. ^{[3
]}

机构：

[1] Tech Univ Berlin, Inst Organ Chem, D-1000 Berlin 12, Germany

[2] Univ Paris 11, Phys Solides Lab, F-91405 Orsay, France

[3] Weizmann Inst Sci, IL-76100 Rehovot, Israel

来源：

MOLECULAR CRYSTALS AND LIQUID CRYSTALS | 1991年 / 203卷

关键词：

inositols natural product; derivatives; 2H-NMR; mesogens; x-ray diffraction;

D O I：

10.1080/00268949108046054

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Results of x-ray measurements on the various columnar mesophases of multi-ethers of the naturally occurring stereoisomers myo- and scyllo-inositol are presented. Depending on the number of alkyl substituents at their inositol cores such derivatives show interesting kinds of molecular organization in their liquid-crystalline states. Thus, to the best of our knowledge, the first thermotropic mesophase of tetragonal symmetry exhibited by a low-molecular weight system is described. Vicinal diols and a tetrol of this new group of liquid crystals are coupled within their mesophases by hydrogen bonding networks. In case of scyllo-inositol it could be shown that the number of functionalizations determines the size of this network or the degree of multimerization; columnar mesophases composed of dimers or pentamers were observed. A comparison of stereoisomeric inositol tetraethers (vicinal cis- and trans-diols) clearly revealed stereochemical influences on their liquid-crystalline properties.

引用

页码：149 / 158

页数：10

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