- Tytuł:
- Homonuclear Separated Local-Field Spectroscopy by Magnetization-Exchange NMR
- Autorzy:
-
Demco, D.
Filip, X.
Filip, C.
Chira, D.
Cozar, O. - Powiązania:
- https://bibliotekanauki.pl/articles/1968466.pdf
- Data publikacji:
- 1997-12
- Wydawca:
- Polska Akademia Nauk. Instytut Fizyki PAN
- Tematy:
-
33.25.+k
61.41.+e - Opis:
- The possibility to perform homonuclear separated-local field NMR spectroscopy by magnetization-exchange is presented. Solid-state one-dimensional proton magnetization-exchange NMR is used to investigate intergroup residual dipolar couplings in cis-1,4-polybutadiene elastomer. A three-spin model is employed, in which the CH- and CH$\text{}_{2}$-protons are considered to be coupled by residual dipolar interactions. The magnetization-exchange process between the CH- and the CH$\text{}_{2}$-group in the regime of short mixing time provides valuable insight regarding molecular order. The spin-system response reflects well-localized dipolar interactions. The residual intergroup dipolar couplings are measured along the average polymer-chain direction for different temperatures. The dynamic order parameter along the chains is also evaluated.
- Źródło:
-
Acta Physica Polonica A; 1997, 92, 6; 1135-1149
0587-4246
1898-794X - Pojawia się w:
- Acta Physica Polonica A
- Dostawca treści:
- Biblioteka Nauki
Artykuł