title: [3]rotaxane synthesized via covalent bond formation can recognize cations forming a sandwich structure.
abstract: A novel [3]rotaxane composed of two 25-membered crownophanes and one axle molecule having two anthryl end groups was successfully synthesized via covalent bond formation followed by aminolysis, and can incorporate caesium ion into the space between the two macrocycles as a 1 : 1 sandwich-type complex, whereas it makes a 1 : 2 complex with lithium ion.
authors.affiliation: Nanoarchitectonics Research Center, National Institute of Advanced Industrial Science and Technology, Tsukuba Central 4, 1-1-1 Higashi, Tsukuba, 305-8562, Japan. y-nagawa@aist.go.jp
authors.forename: Yoshinobu
authors.initials: Y
authors.lastname: Nagawa
authors.forename: Jun-ichi
authors.initials: J
authors.lastname: Suga
authors.forename: Kazuhisa
authors.initials: K
authors.lastname: Hiratani
authors.forename: Emiko
authors.initials: E
authors.lastname: Koyama
authors.forename: Masatoshi
authors.initials: M
authors.lastname: Kanesato