title: Donor-acceptor pretzelanes and a cyclic bis[2]catenane homologue.
authors.affiliation: California NanoSystems Institute and Department of Chemistry and Biochemistry, University of California, Los Angeles, 405 Hilgard Avenue, Los Angeles, CA 90095-1569, USA.
authors.forename: Yi
authors.initials: Y
authors.lastname: Liu
authors.forename: Paul A
authors.initials: PA
authors.lastname: Bonvallet
authors.forename: Scott A
authors.initials: SA
authors.lastname: Vignon
authors.forename: Saeed I
authors.initials: SI
authors.lastname: Khan
authors.forename: J Fraser
authors.initials: JF
authors.lastname: Stoddart