Figure 1.

Homonuclear decoupling strategies initially implemented for ¹³C direct detection: band-selective homonuclear decoupling (top panel), virtual decoupling achieved through the IPAP (middle panel), and S³E (bottom panel) approaches. A scheme illustrating the linear combinations performed to achieve virtual decoupling is also reported on the right side of the middle panel. The contribution of the IP and AP components to the two independent FIDs acquired through the S³E approach is also schematically indicated on the right side of the bottom panel.