A supramolecular metal-organic framework derived from bismuth iodide and 4,4′-bipyridinium derivative: Synthesis, structure and efficient adsorption of dyes

The solvothermal reaction of a mixture of bismuth iodide, flexible cationic compound 1,1 ''-(1,4-butanediy1)bis[4,4'-bipyridinium] bis1tetrafluoroborate] (bbpyf) and HI at the temperature of 110 degrees C resulted in a novel compound, namely [bbpy][Bi4I16] (1). The structure of compound 1 was explored with IR spectroscopy, thermal gravimetric analysis (TGA), PXRD, UV-vis diffuse reflectance spectra and singlecrystal X-ray diffraction in the solid state. Compound 1 was a 2D supramolecular structure consisted of one linear cationic compound bbpy(2+) and inorganic anion cluster [B4I16](2-) and contained a channel of 11.214 x 9.727 angstrom via noncovalent interactions. In addition, the adsorption behavior of 1 was also investigated. And it could adsorb methylene blue (MB) and Rhodamine B (RhB) from waste water fast and effectively, highlighting its potential application for environmental issues. (C) 2015 Elsevier Inc. All rights reserved.