Figure 4.

Pulse sequences and coherence transfer pathways used to measure the NMR relaxation rates of: (a) $T_{11}(a,s)$; (b) $T_{20}$ and (c) $T_{22}(a,s)$ coherences (see the Appendix C). The delay ${\delta }_{opt}$ is selected to optimise the coherence tranfer, and the delay $ϵ$ is set equal to 10 $\mu$s. Reprinted with permission from [23]. Copyright (2014) American Chemical Society.