title: Acid/base controllable molecular switch based on a neutral phenanthroline guest penetrated pseudorotaxane.
abstract: A ditopic macrocycle with a bisamide and a half dibenzo-crown ether component has been newly synthesized and its complexation behavior toward neutral phenanthroline derivatives is reported. The macrocycle can bind phenanthroline derivatives very strongly by hydrogen bonding and pi-electron interaction, yielding pseudorotaxane structures. The inclusion complexes show a pH controllable reversible threading-dethreading molecular switching system.
authors.affiliation: Department of Applied Chemistry, Faculty of Engineering, Osaka Institute of Technology, Ohmiya, Asahi-ku, Osaka 535-8585, Japan. muraoka@chem.oit.ac.jp
authors.forename: Masahiro
authors.initials: M
authors.lastname: Muraoka
authors.forename: Hiromitsu
authors.initials: H
authors.lastname: Irie
authors.forename: Yohji
authors.initials: Y
authors.lastname: Nakatsuji