Conversion from Pillar[5]arene to Pillar[6–15]arenes by Ring Expansion and Encapsulation of C₆₀ by Pillar[<i>n</i>]arenes with Nanosize Cavities

Abstract

Conversion of ring size from pillar[5]arene to pillar[6–15]arenes and isolation of pillar[n]arene homologues (n = 11–13) with known pillar[n]arene homologues (n = 6–10) are demonstrated. Pillar[10]arene formed the most stable host–guest complex with C60 among the pillar[5–14]arenes.