Fig. 2
From: Hydrogen-bonded frameworks for molecular structure determination
Schematic representations of host frameworks appearing herein. a–c Guanidinium disulfonate simply brick, zigzag brick, and crisscross bilayer architectures. d Guanidinium monosulfonate continuously layered architecture. e Tricylindrical architecture observed for the guanidinium tri(4-sulfophenyl)benzene host (G3TSPHB)
