Fig. 1
From: Hydrogen-bonded frameworks for molecular structure determination
GS framework components. Top: the typical quasi-hexagonal GS sheet, illustrating the hydrogen-bonded hinge between hydrogen-bonded major ribbons (one of these is highlighted in gray) that allows facile puckering of the GS sheet with concomitant shrink-wrapping around guests in the inclusion cavities. The R substituents on the sulfur atoms denote organic groups that can project from either side of the GS sheet. Bottom: Guanidinium organosulfonates used here
