Radical exchange, computation

Perhaps no technology in human history has radically changed so many disciplines as the introduction of personal computing and the now-ubiquitous presence of the World Wide Web. What the joint application of these enabling technologies allows us to do is to instantaneously and efficiently exchange... 

Fig. 12 Example polyacetylenes with pendant radical groups, with a computed geometry example of pendant twisting that severely limits exchange along the main chain.

Block equations can be constructed that describe the macroscopic magnetization of the spin system including the relaxation mechanism involving spin exchange caused by molecular collisions. These equations were solved as a function of the exchange frequency, wex, for the nitroxide free radical case. Spectra were computed by assuming the degrees of motional freedom observed with the labeled androstane or cholestane molecules localized at the air-water interface. 

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