122211-80-7Relevant academic research and scientific papers
Thermotropic Liquid Crystals Based on Oligosaccharides. n-Alkyl 1-O-β-D-Cellobiosides
Ma, Yung-Dae,Takada, Akihiko,Sugiura, Makoto,Fukuda, Takeshi,Miyamoto, Takeaki,Watanabe, Junji
, p. 346 - 351 (1994)
n-Alkyl 1-O-β-D-cellobiosides with an alkyl length ranging from 7 to 18 in carbon number m were synthesized, and their thermal properties were studied in comparison with those of the already-known monosaccharide homologues, n-alkyl 1-O-β-D-glucopyranosides.The cellobiosides were found to exhibit a thermotropic mesophase at higher temperatures than the glucopyranosides.Depending on m and thermal history, the cellobiosides showed various textures such as homeotropic, transient batonnets, polygonal, and fan-shaped textures.Like in the case of the monosaccharide homologues, the difficulty of aligning the samples prohibited a full classification of the mesophase, but the X-ray diffractograms of the unaligned cellobiosides indicated that their mesophase belongs to smectic A (or less possibly, smectic C).The m dependence of the lamella thickness was much weaker than (about half) that of the monosaccharide homologues.Possible molecular arrangements of the cellobiosides in the mesophase were presented.
Alkyl melibioside and alkyl cellobioside surfactants: Effect of sugar headgroup and alkyl chain length on performance
Kegel, Laurel L.,Szabó, Lajos Z.,Polt, Robin,Pemberton, Jeanne E.
, p. 4446 - 4460 (2016/08/18)
The potential of glycolipid surfactants, composed of a sugar headgroup and lipid tail, as highly biodegradable and less toxic alternatives to commonly used surfactants motivates the systematic study of structure-function relationships of various glycolipid surfactants. Advances in the efficient synthesis of high purity amphipathic glycolipid surfactants enable the analysis of a diverse set of glycolipids. The solution phase properties of two suites of glycolipid surfactants, n-alkyl-O-melibiosides and n-alkyl-O-cellobiosides, with varying straight-chain alkyl tails of 8, 10 and 12 carbons are investigated in this work. This study substantiates their efficient surfactant performance and reveals their aggregate structure and microenvironment as it relates to molecular structure. Surface tensiometry demonstrates critical micelle concentrations of 0.2-40 mM with minimum surface tension values of 36-40 mN m-1. Time resolved fluorescence quenching (TRFQ) spectroscopy is used to calculate micelle aggregation number (12-70 molecules per micelle) and assess relative micropolarity and microfluidity within the aggregates. The average aggregation numbers determined by TRFQ and apparent hydrodynamic radii determined by dynamic light scattering vary with alkyl chain length and headgroup size, but these properties are relatively insensitive to changes in concentration. The aggregates form nearly spherical, tightly-packed micelles with a small population of vesicles and polydispersity present at low concentrations or with short alkyl chain length.
