title: pH-responsive movement of cucurbit[7]uril in a diblock polypseudorotaxane containing dimethyl beta-cyclodextrin and cucurbit[7]uril.
abstract: [Structure: see text] A polypseudorotaxane consisting of cucurbit[7]uril (CB[7])/N,N'-(3-phenylenebis(methylene)dipropargylamine (PMPA), [2]pseudorotaxane, and 2,6-O-dimethyl beta-cyclodextrin (DM-beta-CD)/alpha,omega-bisazidopropylene glycol 400 [2]pseudorotaxane was synthesized using the "click" reaction. The polypseudorotaxane structure was maintained in aqueous solution over a wide range of pH values with the DM-beta-CD units contributing to increased solubilization of the polypseudorotaxane without dethreading. The pH-responsive movement of the CB[7] units in the polypseudorotaxane was also observed.
authors.affiliation: School of Materials Science, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi, Ishikawa 923-1292, Japan.
authors.forename: Tooru
authors.initials: T
authors.lastname: Ooya
authors.forename: Daisuke
authors.initials: D
authors.lastname: Inoue
authors.forename: Hak Soo
authors.initials: HS
authors.lastname: Choi
authors.forename: Yuichiro
authors.initials: Y
authors.lastname: Kobayashi
authors.forename: Scott
authors.initials: S
authors.lastname: Loethen
authors.forename: David H
authors.initials: DH
authors.lastname: Thompson
authors.forename: Young Ho
authors.initials: YH
authors.lastname: Ko
authors.forename: Kimoon
authors.initials: K
authors.lastname: Kim
authors.forename: Nobuhiko
authors.initials: N
authors.lastname: Yui
mesh_terms: D001952:Bridged-Ring Compounds / Q000138:chemical synthesis* / Q000737:chemistry; D003505:Cyclodextrins / Q000138:chemical synthesis* / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D007093:Imidazoles / Q000138:chemical synthesis* / Q000737:chemistry; D008958:Models, Molecular; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D043862:Rotaxanes / Q000138:chemical synthesis* / Q000737:chemistry; D047028:Macrocyclic Compounds; D000099246:Cucurbit(n)urils
chemical_list: D001952:Bridged-Ring Compounds; D003505:Cyclodextrins; D007093:Imidazoles; D043862:Rotaxanes; C456276:cucurbit(7)uril; D047028:Macrocyclic Compounds; D000099246:Cucurbit(n)urils