Novel supramolecular organogels based on a hydrazide derivative: non-polar solvent-assisted self-assembly, selective gelation properties, nanostructure, solvent dynamics

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

“…Therefore, it is experimentally difficult to detect the adsorbate molecules but possible thanks to the field cycling NMR relaxometry method [42][43][44]. It is the most suitable NMR method for the identification and characterization of molecular dynamics in porous media and has been successfully applied to study the solvent dynamics in molecular gels [33,34,36,[55][56][57][58]. Through the solvent dynamics studies we were able to detect the solvent-gelator interactions in some of the molecular gels [33,36,37,55,58].…”

“…It is the most suitable NMR method for the identification and characterization of molecular dynamics in porous media and has been successfully applied to study the solvent dynamics in molecular gels [33,34,36,[55][56][57][58]. Through the solvent dynamics studies we were able to detect the solvent-gelator interactions in some of the molecular gels [33,36,37,55,58]. The FC NMR relaxometry allowed measurements of the frequency dependence of spin-lattice relaxation time T 1 (NMRD profile) which reflects the features of the spectral density function and, hence, of the dipolar correlation function, in the range from a few kHz to 40 MHz.…”

“…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.…”

Increased rate of solvent diffusion in a prototypical supramolecular gel measured on the picosecond timescale

“…Tritt-Goc and co-workers have reported a large volume of work in this field, and show for the investigated sugar-based gelators that the solvent diffusion slows down in the gels compared to the bulk in line with the QENS measurements of solvophilic gels. [29][30][31][32] Having observed an opposite effect by QENS in the current study, we recorded DOSY spectra of gels at both gelator concentrations. Both types of proton signals (CH and OH) reveal a distinctly slower diffusion of the solvent in the gel samples than in the bulk, in good agreement with previous NMR-based studies.…”

Novel approach in determination of ionic conductivity and phase transition temperatures in gel electrolytes based on Low Molecular Weight Gelators

“…It is well known that for the case of the physical gels the rate and the final temperature of cooling stage is crucial for gel preparation and final properties of the system. It has been shown that microstructure and molecular dynamics of the liquid phase in physical gels which are the case for gel electrolytes based on LMWG, depends on the composition and thermal treating of the system [40][41][42][43]. Proposed method gives the possibility to measure conductivity and temperature dependences of the gel electrolytes with different cooling and heating rates, allowing for observation of the system response to changing external conditions and its influence on the properties.…”