| Autor: |
Sillescu, Hans |
| Předmět: |
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| Zdroj: |
Journal of Chemical Physics; 4/1/1996, Vol. 104 Issue 13, p4877, 10p |
| Abstrakt: |
A simple model of non-Markovian molecular reorientation is applied to multidimensional NMR experiments in supercooled liquids and polymers close to the glass transition. The process of exchange between components of a correlation time distribution is related with the notions ‘‘exponential/nonexponential, homogeneous/heterogeneous, Markovian/non-Markovian, and ergodic/nonergodic’’ often used in relation with molecular dynamics in viscous systems. By working out a detailed example of two-state exchange the difference between 2D and reduced 4D-spectra with respect to the mechanism and dynamics of molecular reorientation in complex liquids is elucidated. © 1996 American Institute of Physics. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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