期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 57, 期 41, 页码 13652-13656出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201806047
关键词
catenanes; coordination cages; self-assembly; small-angle neutron scattering (SANS); supramolecular chemistry
资金
- China Scholarship Council
- Fonds der Chemischen Industrie
- DFG [GC 489/2-2]
- DFG (RESOLV Cluster of Excellence EXC 1069)
A series of metal-mediated cages, having multiple cavities, was synthesized from Pd-II cations and tris- or tetrakis-monodentate bridging ligands and characterized by NMR spectroscopy, mass spectrometry, and X-ray methods. The peanut-shaped [Pd3L41] cage deriving from the tris-monodentate ligand L-1 could be quantitatively converted into its interpenetrated [5Cl@Pd6L81] dimer featuring a linear {[Pd-Cl-](5)Pd} 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 3.7nm aggregates into mono-layered discs of 14 nm diameter via solvophobic interactions between the hexyl sidechains. The hepta-cationic [5Cl@Pd6L81] 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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