title: Discrete multiporphyrin pseudorotaxane assemblies from di- and tetravalent porphyrin building blocks.
abstract: Two pairs of divalent and tetravalent porphyrin building blocks carrying the complementary supramolecular crown ether/secondary ammonium ion binding motif have been synthesized and their derived pseudorotaxanes have been studied by a combination of NMR spectroscopy in solution and ESI mass spectrometry in the gas phase. By simple mixing of the components the formation of discrete dimeric and trimeric (metallo)porphyrin complexes predominates, in accordance to binding stoichiometry, while the amount of alternative structures can be neglected. Our results illustrate the power of multivalency to program the multicomponent self-assembly of specific entities into discrete functional nanostructures.
authors.affiliation: Department of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor-Str. 2, 12489 Berlin, Germany. ; Tel: +49 (0)30 2093-7308.
authors.forename: Mirko
authors.initials: M
authors.lastname: Lohse
authors.affiliation: Institut für Chemie und Biochemie, Freie Universität Berlin, Takustraße 3, 14195 Berlin, Germany. ; Tel: +49(0)308385-2639.
authors.forename: Larissa K S
authors.initials: LK
authors.lastname: von Krbek
authors.affiliation: Department of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor-Str. 2, 12489 Berlin, Germany. ; Tel: +49 (0)30 2093-7308.
authors.forename: Sebastian
authors.initials: S
authors.lastname: Radunz
authors.affiliation: Institut für Chemie und Biochemie, Freie Universität Berlin, Takustraße 3, 14195 Berlin, Germany. ; Tel: +49(0)308385-2639.
authors.forename: Suresh
authors.initials: S
authors.lastname: Moorthy
authors.affiliation: Institut für Chemie und Biochemie, Freie Universität Berlin, Takustraße 3, 14195 Berlin, Germany. ; Tel: +49(0)308385-2639.
authors.forename: Christoph A
authors.initials: CA
authors.lastname: Schalley
authors.affiliation: Department of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor-Str. 2, 12489 Berlin, Germany. ; Tel: +49 (0)30 2093-7308.
authors.forename: Stefan
authors.initials: S
authors.lastname: Hecht
keywords: crown ethers; multicomponent assembly; multivalency; porphyrins; pseudorotaxanes