COLUMNAR LIQUID-CRYSTALS IN OLIGOSACCHARIDE DERIVATIVES .1. DISCOTIC COLUMNAR LIQUID-CRYSTALS IN CELLOBIOSE OCTADECANOATE AND CELLOTRIOSE HENDECADECANOATE

被引:31
作者
ITOH, T
TAKADA, A
FUKUDA, T
MIYAMOTO, T
YAKOH, Y
WATANABE, J
机构
[1] TOKYO INST TECHNOL,DEPT POLYMER CHEM,MEGURO KU,TOKYO 152,JAPAN
[2] KYOTO UNIV,INST CHEM RES,UJI,KYOTO 611,JAPAN
关键词
D O I
10.1080/02678299108035499
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Cellobiose octadecanoate and cellotriose hendecadecanoate were synthesized and their mesophase properties were studied. Both ester derivatives show enantiotropic mesophases in the temperature region below 100-degrees-C. From the observations of microscopic texture and X-ray pattern, the mesophase was found to be of the hexagonal columnar, in which the column is built up by a periodic stacking of the cellobiose or cellotriose skeleton and packed into a two-dimensional hexagonal lattice. The mesophase is thus similar to the hexagonal ordered columnar (D(ho)) phase in a class of discotics, indicating that cellobiose and cellotriose moieties can work as discotic mesogens.
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页码:221 / 228
页数:8
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