A noncovalently connected metal–organic framework assembled from a Ni(iii)-supported polyoxometalate–imidazolate hybrid

Abstract

The first mixed-valence nickel-supported polyoxometalate-based metal–organic framework, (H₂mim)[Ni^III(Hmim)₄][SiW₁₁Ni^IIO₃₇(OH)₂(Hmim)]·3H₂O (1) (Hmim = 2-methylimidazole), has been synthesized using a steam-assisted conversion method, and is constructed from noncovalent interactions (hydrogen bonds and π⋯π stacking interactions). 1 has a repeating honeycomb-shaped internal structure with one-dimensional channels along the direction of the c axis, where the diameter of the aperture is as large as 18.83 Å. Furthermore, the stability and the optical band gaps are investigated.