Showing papers in "The Journal of Physical Chemistry in 1972"

Estimating slow-motional rotational correlation times for nitroxides by electron spin resonance

Abstract: A simple method of estimating slow-motional rotational correlation times rR for nitroxides by esr, which is based on the rigorous theory of Freed, Bruno, and Polnaszek, is discussed. The results can be fit to the expression r3 = a(1 S)b , where S is the ratio of the separation of the outer hyperfine extrema to that for t,he rigid limit value. The parameters a and b depend upon intrinsic line width, rotational model, and hyperfine parameters, and appropriate results are given.