“…These pulse sequences were introduced for two-spin 2QC excitation among the CTs of half-integer spins [9,38,49]. The recoupling schemes have been exploited for probing proximities among homonuclear 11 B, 23 Na, and 27 Al sites in a multitude of structurally well-ordered, as well as disordered, network-based materials [8,9,38,41,[49][50][51][52][53][54][55][56]. Moreover, they have also been employed in several structural studies of both organic and inorganic systems where spin-1/2 nuclei were used as probes, e.g., 13 C [57-60], 1 H [61,62], and 31 P [63][64][65].…”