Pillar[5]arene–neutral guest recognition based supramolecular alternating copolymer containing [c2]daisy chain and bis-pillar[5]arene units

• DOI: 10.1039/c3py00462g
• Publication Date: 2013-05-01T23:43:09Z
• Authors: Xiaoyang Wang; Kang Han; Jian Li; Xueshun Jia; Chunju Li
• Keywords: 01 natural sciences; 0104 chemical sciences

A novel supramolecular alternating copolymer with [c2]daisy-chain dimer and macrocycle host dimer as repeating units has been fabricated. A key factor for this new assembly strategy is based on a [c2]daisy-chain pseudorotaxane bearing additional unbound recognition sites at both ends, which was successfully achieved from a careful designed heterotritopic (AB2-type) copillar[5]arene. By utilizing the intermolecular host–guest interactions between the double-threaded dimer and a pillar[5]arene dimer, a linear supramolecular polymer was prepared. These results provided not only a convenient approach for the construction of [c2]daisy chain based supramolecular polymers, but also a novel method for building supramolecular alternating copolymers.