Decay of angular correlation functions by multiple rotational potential diffusion in polymer chains, with applications to NMR relaxation in paraffin chains of lipid bilayers

摘要: Abstract Spectroscopic techniques as NMR give information about correlation functions of the motion. For polymer chains, this motion is result internal rotations several bonds. These are supposed to be independent each other and described by one-dimensional rotational diffusion in a suitable potential. The general case calculations made for trigonometric potential with three minima. free trans-gauche model limiting cases model. decay on two time scales, short times due within wells potential, which however not causes zero. On longer scale further zero passage over barriers. applied NMR-relaxation hydro-carbon chains lipid bilayers, where it gives another dependence upon chain position than previous models.