Reversible flexible structural changes in multidimensional MOFs by guest molecules (I2, NH3) and thermal stimulation

Three metal-organic frameworks (MOFs), [Cu(INA)(2)], [Cu(INA)(2)I-2] and [Cu(INA)(2)(H2O)(2)(NH3)(2)], were synthesized with 3D, 2D, and OD structures, respectively. Reversible flexible structural changes of these MOFs were reported. Through high temperature (60-100 degrees C) stimulation of 12 or ambient temperature stimulation of NH3, [Cu(INA)(2)] (3D) converted to [Cu(INA)212] (2D) and [Cu(INA)(2)(H2O)(2)(NH3)(2)] (OD); as the temperature increased to 150 degrees C, the MOFs changed back to their original form. In this way, this 3D MOF has potential application in the capture of I-2 and NH3 from polluted water and air. XRD, TGA, SEM, NH3-TPD, and the measurement of gas adsorption were used to describe the changes in processes regarding the structure, morphology, and properties. (C) 2015 Elsevier Inc. All rights reserved.