Abstract
Spin-lattice relaxation rates of 5,5,11,11-tetramethylhexadecane, squalane, and squalene have been measured as a function of temperature via pulsed NMR techniques. These relaxation rates are discussed in terms of molecular models which yield nonexponential correlation functions. The particular models employed are based on cooperative relaxation mechanisms which have been found useful in viscoelastic and dielectric relaxation studies. It is found that such mechanisms are also pertinent in the nuclear spin relaxation behavior of these compounds. The distribution of correlation times useful in describing shear relaxation data is also found to be useful in describing spin relaxation data.
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