Negative Cooperativity in the Binding of lmidazolium and Viologen Ions to a Pillar[5]arene-Crown Ether Fused Host
作者
刊物名称
Org. Lett.
年、卷、文献号
2015, 17,
关键词
摘要
A pillar[5]arene-crown ether fused bicyclic host 1 was found to be able to recognize an imidazolium ion G1 by its pillar[5]arene subunit and a viologen ion G2 by its crown ether receptor discriminatively. The simultaneous binding of G1 and G2 by 1 resulted in the formation of a three-component host-guest complex G1 subset of 1 superset of G2. Negative heterotropic cooperative effects were displayed by G1 and G2 in their binding to 1 and were investigated by stepwise bindings of G1 and G2 to 1.
