Abstract
By taking advantage of the Zincke reaction, we successfully synthesized three macrocycles, each of which contains two bipyridinium units as the electron acceptors. Two of them contain sp2-hybridized atoms exclusively in the ring frameworks, while the third contains two methylene units. The third macrocycle is able to form 1:1 inclusion complexes with guests of complementary sizes. A pair of isomers, namely, phenanthrene and anthracene, could be separated by the third macrocycle.
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