Spin-lattice relaxation times T 1 and T 1d as well as NMR second moment were employed to study the molecular dynamics of riboflavin (vitamin B 2 ) in the temperature range 55-350 K. The broad and flat T 1 minimum observed at low temperatures is attributed to the motion of two nonequivalent methyl gr
Molecular Dynamics in a New Solid Glucofuranose-Based Low-Molecular-Weight Organogelator as Studied by1H NMR
β Scribed by M. Bielejewski; A. Rachocki; R. Luboradzki; J. Tritt-Goc
- Book ID
- 106220447
- Publisher
- Springer Vienna
- Year
- 2008
- Tongue
- English
- Weight
- 257 KB
- Volume
- 33
- Category
- Article
- ISSN
- 0937-9347
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Proton second moment and spin-lattice relaxation times T and T in solid anhydrous b-estradiol are measured as a 1 1 r function of temperature. The results show that the C reorientation of the single methyl group provides the mechanism 3 dominating relaxation at low temperatures and reveal the existe
1 Ε½ . H spin-lattice relaxation times and second moments were determined for polycrystalline CH NH Sb Br sample in a 3 3 3 2 9 Ε½ . 2 Ε½ . wide range of temperature 5-200 K at 24.6 and 55.2 MHz. H NMR spectra of CD NH Sb Br were recorded between 3 3 3 2 9 5 K and room temperature. The relaxation time
## Abstract To prevent the precipitation reaction between glycyrrhizin (**1**) and berberine (**3**) in the decoctions of __Glycyrrhiza__/__Coptis__ rhizome or __Glycyrrhiza__/__Phellodendron__ bark, the presence of cyclodextrin (CD) in the mixture was proven to be effective. The preventing effect