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Studies on supramolecular gel formation using DOSY NMR
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SYSNO ASEP 0443917 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Studies on supramolecular gel formation using DOSY NMR Author(s) Nonappa, N. (FI)
Šaman, David (UOCHB-X) RID, ORCID
Kolehmainen, E. (FI)Number of authors 3 Source Title Magnetic Resonance in Chemistry. - : Wiley - ISSN 0749-1581
Roč. 53, č. 4 (2015), s. 256-260Number of pages 5 s. Language eng - English Country GB - United Kingdom Keywords DOSY ; VT NMR ; gel ; diffusion coefficients Subject RIV CF - Physical ; Theoretical Chemistry Institutional support UOCHB-X - RVO:61388963 UT WOS 000351636200002 EID SCOPUS 84925371729 DOI 10.1002/mrc.4185 Annotation Herein, we present the results obtained from our studies on supramolecular self-assembly and molecular mobility of low-molecular-weight gelators (LMWGs) in organic solvents using pulsed field gradient (PFG) diffusion ordered spectroscopy (DOSY) NMR. A series of concentration-dependent DOSY NMR experiments were performed on selected LMWGs to determine the critical gelation concentration (CGC) as well as to understand the behaviour of the gelator molecules in the gel state. In addition, variable-temperature DOSY NMR experiments were performed to determine the gel-to-sol transition. The PFG NMR experiments performed as a function of gradient strength were further analyzed using monoexponential DOSY processing, and the results were compared with the automated Bayesian DOSY transformation to obtain 2D plots. Our results provide useful information on the stepwise self-assembly of small molecules leading to gelation. We believe that the results obtained from these experiments are applicable in determining the CGC and gel melting temperatures of supramolecular gels. Workplace Institute of Organic Chemistry and Biochemistry Contact asep@uochb.cas.cz ; Kateřina Šperková, Tel.: 232 002 584 ; Viktorie Chládková, Tel.: 232 002 434 Year of Publishing 2016
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