- AutorIn
- Wilhelm Kossack
- Wycliffe Kiprop Kipnusu
- Mateusz Dulski
- Karolina Adrjanowicz
- Olga Madejczyk
- Ewa Kaminska
- Emmanuel Urandu Mapesa
- Martin Tress
- Kamil Kaminski
- Friedrich Kremer
- Titel
- The kinetics of mutarotation in L-fucose as monitored by dielectric and infrared spectroscopy
- Zitierfähige Url:
- https://nbn-resolving.org/urn:nbn:de:bsz:15-qucosa2-212596
- Quellenangabe
- The Journal of Chemical Physics Verlag: AIP Publishing
Erscheinungsjahr: 2014
Jahrgang: 140
Heft: 21
Artikelnummer: 215101 - Erstveröffentlichung
- 2014
- Abstract (EN)
- Fourier Transform Infrared Spectroscopy and Broadband Dielectric Spectroscopy are combined to trace kinetics of mutarotation in L-fucose. After quenching molten samples down to temperatures between T=313 K and 328 K, the concentrations of two anomeric species change according to a simple exponential time dependence, as seen by an increase in absorbance of specific IR-vibrations. In contrast, the dielectric spectra reveal a slowing down of the structural (α-) relaxation process according to a stretched exponential time dependence (stretching exponent of 1.5 ± 0.2). The rates of change in the IR absorption for α- and β-fucopyranose are (at T = 313 K) nearly one decade faster than that of the intermolecular interactions as measured by the shift of the α-relaxation. This reflects the fact that the α-relaxation monitors the equilibration at a mesoscopic length scale, resulting from fluctuations in the anomeric composition.
- Andere Ausgabe
- Link zur Originalpublikation in The Journal of Chemical Physics
Link: https://dx.doi.org/10.1063/1.4880718 - Freie Schlagwörter (EN)
- mutarotation, L-fucose, IR-spectroscopy
- Klassifikation (DDC)
- 541
- Verlag
- AIP Publishing, Melville
- Version / Begutachtungsstatus
- publizierte Version / Verlagsversion
- URN Qucosa
- urn:nbn:de:bsz:15-qucosa2-212596
- Veröffentlichungsdatum Qucosa
- 22.05.2018
- Dokumenttyp
- Artikel
- Sprache des Dokumentes
- Englisch