Catenation and Aggregation of Multi‐Cavity Coordination Cages |
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| Authors: | Dr Julian J Holstein Priv‐Doz?Dr Birger Dittrich Miriam Simon Dr Sylvain Prévost Prof?Dr Michael Gradzielski Prof?Dr Guido H Clever |
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| Affiliation: | 1. Faculty of Chemistry and Chemical Biology, TU Dortmund University, Dortmund, Germany;2. Institute for Inorganic Chemistry, Heinrich-Heine University Düsseldorf, Düsseldorf, Germany;3. Stranski-Laboratorium für Physikalische und Theoretische Chemie, Institut für Chemie, Technische Universit?t Berlin, Berlin, Germany;4. Institut Max von Laue—Paul Langevin (ILL), Grenoble, France |
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| Abstract: | A series of metal‐mediated cages, having multiple cavities, was synthesized from PdII cations and tris‐ or tetrakis‐monodentate bridging ligands and characterized by NMR spectroscopy, mass spectrometry, and X‐ray methods. The peanut‐shaped Pd3L14] cage deriving from the tris‐monodentate ligand L1 could be quantitatively converted into its interpenetrated 5Cl@Pd6L18] dimer featuring a linear {Pd‐Cl‐]5Pd} stack as an unprecedented structural motif upon addition of chloride anions. Small‐angle neutron scattering (SANS) experiments showed that the cigar‐shaped assembly with a length of 3.7 nm aggregates into mono‐layered discs of 14 nm diameter via solvophobic interactions between the hexyl sidechains. The hepta‐cationic 5Cl@Pd6L18] cage was found to interact with polyanionic oligonucleotide double‐strands under dissolution of the aggregates in water, rendering the compound class interesting for applications based on non‐covalent DNA binding. |
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| Keywords: | catenanes coordination cages self-assembly small-angle neutron scattering (SANS) supramolecular chemistry |
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