Design and Synthesis of Nitrogen-bridged Calixarene-type Macrocycles with Extended pi-System, and Their Application as Molecular Recognition Materials

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Investigated were the synthesis and molecular recognition property of novel calixarene-type macrocycles, in which aromatic rings were linked via nitrogen atoms with intrinsic nature that flexibly changes their electronic configurations. As an eventual outcome, it was demonstrated that the present molecular system selectively recognized potassium ion in solution and carbon dioxide in the solid state. Molecular chirality and oxidation behavior of the present system were also revealed.