Characterization of low molecular-weight gelator methyl-4,6-O-(p-nitrobenzylidene)-α-d-glucopyranoside hydrogels and water diffusion in their networks

Thermal Properties, Conductivity, and Spin-lattice Relaxation of Gel Electrolyte Based on Low Molecular Weight Gelator and Solution of High Temperature Ionic Liquid

“…Reports on such bifunctional gelators are limited in literature [40,41], but they give the opportunity to create new system based on aqueous and non-aqueous electrolyte solutions for preparation of physical gel electrolytes. In the previously published paper [32][33][34][35] we have studied the thermal properties and aggregation mechanisms responsible for the gelation in molecular gels made of gelator 1 with organic solvents and water. It was found by the FT-IR spectroscopy that the hydrogen bonding interactions between gelator molecules are mainly responsible for the aggregation.…”

“…Although many LMWGs have been demonstrated to form gels in organic solvents [29,30], much less attention has been paid to appropriate gelators for ionic liquids or electrolytes [15][16][17]. Based on our experience in the studies of low molecular weight gels [31][32][33][34][35][36][37] we selected one of the sugar base gelators: methyl-4,6-O-(pnitrobenzylidene)-a-D-glucopyranoside [38][39][40]. Its proven gelation abilities to gelatinize organic solvent [32][33][34] but also water [35] prompted us to make use of this gelator for preparation of low molecular weight gel electrolytes.…”

The structural parameters of rigid matrix of saccharide-based gel described by short and long diffusion regime analysis

“…In comparison with these solvents, the toluene molecules have a small dipole moment equal to 0.36 D. Knowing the diameter of the aggregates (calculated from diffusion measurements), we can conclude that in the case of toluene the length of aggregates should contain from a few to several times more than thickness. In water with dipole moment of 1.85 D, Gluco-NO 2 forms the fibres with *10 and *300 lm thin and length, respectively [12]. On the basis of the time-dependent diffusion coefficient of toluene in Gluco-NO 2 gels, the 1-2-lmthin and 10-20-lm-length fibres can be concluded by tortuosity analysis.…”

“…Generally, for this class of gelator the shape of aggregates changes from short and thick for less polar solvent to very long and thin for higher polarity of solvent [32]. In water, 1-propanediol or 1-butanol, the gelator Gluco-NO 2 forms about 1-5-lm-thin fibres with a length of 100-300 lm [12,33]. In comparison with these solvents, the toluene molecules have a small dipole moment equal to 0.36 D. Knowing the diameter of the aggregates (calculated from diffusion measurements), we can conclude that in the case of toluene the length of aggregates should contain from a few to several times more than thickness.…”

“…However, the application of this compound requires a detailed knowledge of its physical and chemical properties. Recently, we studied the thermal properties and the microstructure of the hydrogel of Gluco-NO 2 and the molecular dynamics of water in the gel network structure [12]. In the current paper, the measurements of the diffusion coefficient of toluene (C 6 H 5 CH 3 , methylbenzene) confined in the methyl-4,6-O-(p-nitrobenzylidene)-a-D-glucopyranoside-based gel and structural parameters of rigid matrix of gel are presented.…”