6533b828fe1ef96bd1287964

RESEARCH PRODUCT

From strong to fragile glass formers: secondary relaxation in polyalcohols.

Gerald HinzeMarian PaluchHans SillescuA. Döß

subject

Magnetic Resonance SpectroscopyHydrogen bondSpectrum AnalysisGeneral Physics and AstronomyNuclear magnetic resonance spectroscopyXylitolchemistry.chemical_compoundCrystallographySugar AlcoholschemistryProton NMRRelaxation (physics)MoleculeSorbitolSorbitolGlassThreitolXylitol

description

We have studied details of the molecular origin of slow secondary relaxation near T(g) in a series of neat polyalcohols by means of dielectric spectroscopy and (2)H NMR. From glycerol to threitol, xylitol, and sorbitol the appearance of the secondary relaxation changes gradually from a wing-type scenario to a pronounced beta peak. It is found that in sorbitol the dynamics of the whole molecule contributes equally to the beta process, while in glycerol the hydrogen bond forming OH groups remain rather rigid compared to the hydrogens bonded to the carbon skeleton.

yearjournalcountryeditionlanguage
2002-02-14Physical review letters
10.1103/physrevlett.88.095701https://pubmed.ncbi.nlm.nih.gov/11864026