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 Kramers 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. This constitutes an effective mechanism of coupling between the librational motion and the conformational dynamics in long chain molecules.
About the coupling between librational motions and conformational transitions in chain molecules
MORO, GIORGIO
1990
Abstract
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 Kramers 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. This constitutes an effective mechanism of coupling between the librational motion and the conformational dynamics in long chain molecules.Pubblicazioni consigliate
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