日本ゼオライト学会　刊行物 Publication of Japan Zeolite Association

Porous Coordination Polymer (PCP) and Metal-Organic Framework (MOF) are crystalline porous materials capable of constructing diverse structures. Because of their designability of chemical and physical properties in addition to their framework structures, they are being investigated not only for gas adsorption and separation, but also for catalytic, magnetic, and ionic- and protonic- conductivity applications. Some PCP/MOFs show structural flexibility and develop unique adsorption properties different from those of conventional porous materials, which are expected to develop into industrial applications. The structural characterization of PCP/MOF by X-ray is very important as well as that of zeolite. However, since PCP/MOF may lose its single-crystallinity during structural changes, a method to determine the structure of non-single-crystalline samples by combining molecular simulation and Rietveld refinement has also been developed. In addition, infrared and Raman spectroscopy, NMR, and EPR measurements are also used to evaluate the local structure and interactions between the framework structure and guest molecules. In recent years, new measurement and analysis techniques, which are simultaneous measurement of gas adsorption and other measurements such as X-rays or Raman, have been developed to analyze the correlation between the structural changes and the unique adsorption behavior of PCP/MOF.