The recent advent of porous coordination polymers (PCPs) or metal-organic frameworks (MOFs) as new functional microporous materials, have attracted the attention of chemists and physicists due to not only scientific but also application interest in the creation of unprecedented regular nano-sized spaces and in the finding of novel phenomena [1-3]. We have found unique porous properties of PCPs, which respond to specific guests, dissimilar to the conventional porous materials . This new class of materials encompasses possibility creating platform for porous functions. One target of the synthesis of PCPs is for gas science & technology [5,6], focusing on low molecular weight molecules. High-efficiency separation technology, different from conventional ways, is essential for low-energy separation of gas resources, flue gases, air, pollutant gases and other industrial materials. The second target is for solid state ion conductors, which are utilized in various devices such as batteries and fuel cells. PCPs (and CPs) could provide a fascinating platform for solid ion conductors especially in the field of solid proton conductors . We could develop several approaches to acquire unique ion conductive property by designing modules of PCPs and guests. The third target is PCP catalysts for gas substances.
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