About the coupling between librational motions and conformational transitions in chain molecules
✍ Scribed by Giorgio J. Moro
- Publisher
- Elsevier Science
- Year
- 1990
- Tongue
- English
- Weight
- 345 KB
- Volume
- 173
- Category
- Article
- ISSN
- 0009-2614
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✦ Synopsis
The conformational transitions lead to reorientations of a small fraction only of a chain molecule. This follows from the analysis of the barrier crossing problem according to the Framers theory. Therefore, the librational motion operating after a transition is responsible for the attainment of the new equilibrium distribution. A simplified treatment is presented for the model system of an infinite chain of rotors. It is shown that the reorientations of the chain units induced by a conformational transition, propagate along the chain with increasing time delays. T'his constitutes an effective mechanism of coupling between the librational motion and the conformational dynamics in long chain molecules.