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Solid State and Solution Properties of Octyl D ‐Glucopyranosides
Author(s) -
Straathof A. J. J.,
van Bekkum H.,
Kieboom A. P. G.
Publication year - 1988
Publication title -
starch ‐ stärke
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.62
H-Index - 82
eISSN - 1521-379X
pISSN - 0038-9056
DOI - 10.1002/star.19880401109
Subject(s) - anomer , chemistry , crystal (programming language) , micelle , krafft temperature , ether , freezing point , solubility , organic chemistry , crystallography , aqueous solution , critical micelle concentration , thermodynamics , physics , programming language , computer science
The physical properties of the surfactants octyl α‐ and β‐D‐glucopyranoside show some remarkable differences. At 25°C, the β‐anomer is much more soluble in water or diethyl ether than the α‐anomer, but only a slight difference in solubility is observed in 1‐octanol. The α‐anomer, which shows a Krafft ‐point at ∼40°C, forms (above this temperature) micelles at half the concentration required for the β‐anomer. Comparison of the transition to the liquid crystal by DSC indicates that the β‐anomer will have a crystal packing which is much less ideal than the crystal packings observed for the α‐anomer.