Through-bond homonuclear correlation experiments in solid-state NMR applied to quadrupolar nuclei in Al-O-P-O-Al chains

Through-bond homonuclear correlation experiments can be realised in solids between spins of type X, separated by four chemical bonds, in X-O-Y-O-X motifs, provided a J coupling between X and Y exists: central transitions of quadrupolar Al-27 spins can be correlated via the J(2) scalar coupling between Al-27 (X) and P-31 (Y) in materials featuring Al-O-P-O-Al motifs.