A novel porous supramolecular complex constructed by the co-crystallization of melamine and sulfate via hydrogen bonds and aromatic π-π interaction

Co-crystallization of melamine(MA) and sulfate results in crystalline product (C₃H₇N₆⁺)₂(SO₄²⁻)] · 2H₂O. The novel supramolecular complex has been characterized by elemental analysis, thermal analysis (TGA and DSC), nuclear magnetic resonance (NMR), and single crystal X-ray diffraction. X-ray crystallographic studies of the complex reveal that the title complex has a 3-D microporous structure which is linked by intense intermolecular hydrogen-bonding interactions (N–H······O, N–H······N, O–H······O) and aromatic π-π interaction, which stabilize the whole crystal framework. The TGA curve shows that the complex is stable up to 500 °C, above which its structure begins to collapse.