多孔性配位化合物の構造の柔軟性を利用した機能の開拓

抄録

Porous coordination polymers (PCPs), also known as metal-organic frameworks (MOFs), constitute a class of crystalline framework materials formed through the coordination of metal clusters and organic ligands. Within this category, there exist structurally responsive PCPs, commonly referred to as flexible PCPs, which can manifest intriguing structural properties. This ability stems from their capacity to adopt multiple interchangeable structures contingent upon external factors such as temperature, pressure, and the presence of guest molecules. We have successfully synthesized and characterized various flexible PCPs demonstrating distinctive sorption/separation, catalysis, and sensing properties, all attributable to their flexible nature. We extensively employ in-situ and operando measurements to elucidate their structural and functional properties. In this account, we outline our recent advancements in functional flexible PCPs based on an innovative design approach. These advancements encompass the creation of multistable activation structural phases, water isotopologue separation, exclusive CO₂ separation, control of catalysis, and modulation of chemiresistivity through orientation control of PCP films.