Abstract A three-dimensional supramolecular compound [Ni(IN) 2 (H 2 O) 4 ] 1 has been rationally designed and synthesized by hydrothermal method, and the structure was characterized with elemental analysis, FT–IR spectrum and X-ray diffractometer. In the packing structure, the stronger intermolecular O–H⋯O hydrogen-bonded and π–π stacking interactions are the most significant factors of controlling