Unique assemblies of alternating positively and negatively charged layers, directed by hydrogen bonds, ionic interactions, and Π-stacking in the crystal structures of complexes between mellitic acid (benzenehexacarboxylic acid) and five planar aromatic bases

Benzenehexacarboxylic acid, mellitic acid (MA), has been used as a core motif to study possible radial self-assembly using complementary aromatic bases. By mixing water solutions of the components, crystals of the salts of MA with 4-aminopyridine (AP), 4-dimethylamino-pyridine (DM), 2,2P̅1 , a =8.257(2)Å, b =8.986(2)Å, c =9.383(1)Å, α=98.60(1)°, β=96.38(2)°, γ=117.07(1)°