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Gelation properties and supramolecular organization trought 1H NMR spectroscopy


Wolsperger, Kristina; Vikić-Topić, Dražen; Makarević, Janja; Frkanec, Leo; Jokić, Milan; Žinić, Mladen
Gelation properties and supramolecular organization trought 1H NMR spectroscopy // Program & Book of Abstracts, The Fourth Dubrovnik NMR Course & Conference / Vikić-Topić, Dražen (ur.).
Zagreb: Institut Ruđer Bošković, 2003. (poster, nije recenziran, sažetak, znanstveni)


Naslov
Gelation properties and supramolecular organization trought 1H NMR spectroscopy

Autori
Wolsperger, Kristina ; Vikić-Topić, Dražen ; Makarević, Janja ; Frkanec, Leo ; Jokić, Milan ; Žinić, Mladen

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Program & Book of Abstracts, The Fourth Dubrovnik NMR Course & Conference / Vikić-Topić, Dražen - Zagreb : Institut Ruđer Bošković, 2003

Skup
The Fourth International Dubrovnik NMR Course and Conference, DU NMR 2003

Mjesto i datum
Dubrovnik, Hrvatska, 28.06.-01.07.2003

Vrsta sudjelovanja
Poster

Vrsta recenzije
Nije recenziran

Ključne riječi
Photoinduced gelation; maleic acid amide to fumaric acid amide isomerization; NMR spectroscopy; free gelator molecules; supramolecular organization

Sažetak
The gelation phenomena exhibited by low molecular weight organic compounds have recently attained increasing attention. Gelator molecules self-assemble into elongated aggregates through highly specific inter-molecular interactions.When these structures are sufficiently long and entangled they may entrap solvent molecules in a network, which leads to the formation of gels. In H-1 NMR spectra of gels only the molecules dissolved in the entrapped solvent could be observed. By using an internal standard, the concentration of dissolved gelator molecules could be determined. This enabled determination of the K(gel) values. From the plots of lnK(gek) vs 1/T, the delta H(gel) of gels have been determined. We shall discuss a photoinduced gelation system based on the maleic acid amide to fumaric acid amide photoisomerization monitored by H-1 NMR spectroscopy

Izvorni jezik
Engleski

Znanstvena područja
Kemija, Biologija