title: [4]Pseudorotaxanes with remarkable self-sorting selectivities.
abstract: The synthesis and characterization of several self-assembled [4]pseudorotaxanes is reported, some of which form in a programmed way based on two similar yet orthogonal crown ether/secondary ammonium ion binding motifs. A preference for the formation of a [4]pseudorotaxane with an antiparallel rather than parallel alignment of crown ether building blocks is observed even in the absence of such orthogonal binding sites, when a homodivalent axle is used.
authors.affiliation: Institut für Chemie und Biochemie, Freie Universität Berlin, Takustrasse 3, 14195 Berlin, Germany.
authors.forename: Wei
authors.initials: W
authors.lastname: Jiang
authors.forename: Dominik
authors.initials: D
authors.lastname: Sattler
authors.forename: Kari
authors.initials: K
authors.lastname: Rissanen
authors.forename: Christoph A
authors.initials: CA
authors.lastname: Schalley