Crystal engineering of 2-D hydrogen bonded molecular networks based on theself-assembly of anionic and cationic modules

Using a self-assembly strategy based on both H-bonding and ionic interactio ns, a molecular module composed of two cyclic amidinium units and that bear s two additional OH groups, thus possessing a total of six H-bond donor sit es, was used to engineer 2-D crystalline molecular networks in the presence of carboxylate anions.