Conversion from Pillar[5]arene to Pillar[6-15]arenes by Ring Expansion and Encapsulation of C60 by Pillar[n]arenes with Nanosize Cavities

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 C-60 among the pillar[5-14]arenes.