Nuclear relaxation rate solvent contribution

The authors interpret this in terms of a hyperconjugative component of the through-bond coupling and its solvational perturbation. That the ratio of k2 is approximately correlated with the static dielectric constant of the solvent (see Table 1.1) could arise from a more mundane dependence of the electron transfer relaxation rate constant on k u. Thus, when Eq. (2) holds the nuclear contribution to the rate constant ratio becomes the relationship in Eq. (3). One does not... 

Roose et al. (1996) studied the magnetic-field dependence of the proton spin-lattice relaxation time Tj (referred to as nuclear-magnetic-relaxation dispersion) in aqueous colloidal silica containing paramagnetic Mn + ions (Figure 1.112). The experimental relaxation rate of solvent protons in aqueous colloidal silica suspensions containing Mn + ions can be expressed as a weighted mean of several contributions ... 

For diamagnetic peptides in isotropic solvents, the primary mechanism of nuclear magnetic relaxation of protonated nuclei and of N nuclei at natural abundance is the dipolar interaction with the directly bound protons. At high magnetic fields, chemical shift anisotropy (CSA) also contributes to the relaxation of the heteronuclei. The rates of these relaxation processes are governed by both the internal motions and the overall rotational motion of the molecule. Consequently, characterization of and N... 

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