title: A water soluble donor-acceptor [2]catenane that can switch between a coplanar and a Gemini-sign conformation.
authors.affiliation: Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1 EW UK.
authors.forename: Ho Yu
authors.initials: HY
authors.lastname: Au-Yeung
authors.forename: G Dan
authors.initials: GD
authors.lastname: Pantoş
authors.forename: Jeremy K M
authors.initials: JK
authors.lastname: Sanders