Journal
CHEMICAL SCIENCE
Volume 3, Issue 11, Pages 3221-3226Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2sc20982a
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A highly selective multiple host-guest complexation system based on pillar[5]arene and pillar[6]arene is reported. A pyridinium cation moiety is included in the pillar[5]arene cavity, but hardly forms a stable host-guest complex with pillar[6]arene. A 1,4-diazabicyclo[2.2.2]octane cation moiety forms a host-guest complex with pillar[6]arene, but not with pillar[5]arene. A synthetic route to mono-reactive pillar [6]arene is also developed, enabling the synthesis of pillar[6]arene with a pyridinium cation group at a single position. Based on the highly selective multiple host-guest complexation system and mono-reactive pillar[6]arene, a supramolecular polymer with alternating pillar[5]arene and pillar[6]arene units is constructed.
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