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. 2022 May 10;122(10):9943–10018. doi: 10.1021/acs.chemrev.1c00918

Figure 54.

Figure 54

15N (a) and 13C (b) R1 and R1ρ relaxation rates calculated for variable correlation times and variable Larmor frequency (for R1) or MAS frequency (for R1ρ). Relaxation rates are calculated using the expressions derived from Redfield theory in ref (317) by assuming that 15N relaxation is driven by the dipolar interaction with a 1H spin 1.02 Å away and by its CSA (170 ppm). For 13C relaxation, we considered a dipolar interaction with a 1H spin 1.1 Å away and a CSA of 40 ppm. The density functions are assumed to follow the model-free formalism, with only the “internal” part of the Lipari–Szabo function34 and the order parameter S2 fixed to 0.85.