Dynamics of glass-forming di-n-butyl phthalate as studied by NMR
| Autor: | S. Głowinkowski, Stefan Jurga, E. Szcześniak, W. Suchanski |
|---|---|
| Rok vydání: | 1997 |
| Předmět: |
Nuclear and High Energy Physics
Magnetic Resonance Spectroscopy Chemical Phenomena Proton Molecular Conformation Analytical chemistry Nuclear Overhauser effect Molecular dynamics Correlation function Supercooling Instrumentation Carbon Isotopes Radiation Chemistry Physical Chemistry Electron Spin Resonance Spectroscopy General Chemistry Dibutyl Phthalate Cold Temperature Proton NMR Relaxation (physics) Physical chemistry Glass Protons Glass transition Hydrogen |
| Zdroj: | Solid State Nuclear Magnetic Resonance. 8:73-79 |
| ISSN: | 0926-2040 |
| DOI: | 10.1016/s0926-2040(96)01292-1 |
| Popis: | Spin-lattice relaxation times T 1 and nuclear Overhauser effect (NOE) enhancement factors for the individual ring carbons in di- n -butyl phthalate (DBF) show that the reorientational correlation function corresponding to the global dynamics in supercooled liquid can be described by a Davidson-Cole distribution. Measurements of proton spin-lattice relaxation times T 1 and T 1ρ , as well as 1 H NMR spectra at temperatures below the glass transition temperature, T g , reveal that the same distribution holds also for description of local dynamics in glassy DBF. The activation parameters of the motions detected are derived. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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