title: Redox-responsive complexation between a pillar[5]arene with mono(ethylene oxide) substituents and paraquat.
abstract: Host-guest complexation between a pillar[5]arene with mono(ethylene oxide) substituents and paraquat was studied. We demonstrated that this pillar[5]arene can form a 1:1 complex with paraquat in solution and in the solid state. The formation of this complex was confirmed by proton NMR spectroscopy, electrospray ionization mass spectrometry, and single crystal X-ray analysis. Furthermore, this complexation can be reversibly controlled through the sequential addition and removal of Zn powder. The host substituent effect on the complexation ability was also addressed.
authors.affiliation: Center for Chemistry of High-Performance and Novel Materials, Department of Chemistry, Zhejiang University , Hangzhou, Zhejiang 310027, PR China.
authors.forename: Xiaodong
authors.initials: X
authors.lastname: Chi
authors.forename: Min
authors.initials: M
authors.lastname: Xue
authors.forename: Yong
authors.initials: Y
authors.lastname: Yao
authors.forename: Feihe
authors.initials: F
authors.lastname: Huang