Crystal to Crystal Guest Exchange in a Mixed Ligand Metal-Organic Framework

The occluded solvent in a mixed ligand metal-organic framework has been displaced by n-hexanol, chloroform, and nitrobenzene in a crystal to crystal guest exchange. The X-ray structures of the three new solvent addticts of Zn(2)NDC(2)DPNI(2) reveal the complete replacement of N',N-dimethylformamide with the new guest. Structural changes to the framework geometry in response to the size of the incoming guest are also exhibited. These new frameworks are characterized by powder X-ray diffraction, thermal gravimetric analysis coupled with infrared spectroscopy, and cross-polarization magic angle spinning NMR.