Ionothermal synthesis of metal-organic frameworks

Abstract

Two compounds, Zn3 (BDC)3 (MIA)2 (1) and Zn(HBTC) (MIA) (BPY) (2) (BDC = terephthalic, MIA = N-methyl-imidazole, BTC = benzene-1,3,5-tricarboxylic, BPY = 4,4'-bipyridine), were synthesized successfully in ionic liquids. X-ray diffraction analyses reveal that they crystallize in the monoclinic C2/c(1) and orthorhombic Fdd2(2) space group, respectively. Compound 1 exhibits a three-dimensional framework, and contains 0.9 nm × 0.9 nm rhombic channels after the terminal coordinated N-methyl-imidazole removed. Compound 2 represents a supermolecule structure constructed through H bond and π ··· π interactions.