Figure 1. Schematic of recoupling pulse sequence and blocks.
(a) General pulse scheme for a 2D 13C-13C spin-diffusion experiment. Second-order recoupling schemes (b) DARR, (c) PARIS (N = 1/2), (d) PARIS (N = 2), (e) PARIS-xy (m = 1)(N = 1/2), (f) PARIS-xy (m = 1)(N = 2), and (g) PARIS-xy (M = 2)(N = 1/2) are applied on the 1H channel during the mixing period.