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Hierarchical Assembly of an Interlocked M 8 L 16 Container
Author(s) -
Bloch Witold M.,
Holstein Julian J.,
Dittrich Birger,
Hiller Wolf,
Clever Guido H.
Publication year - 2018
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201800490
Subject(s) - catenane , catenation , chemistry , molecule , self assembly , crystallography , phenanthrene , nuclear magnetic resonance spectroscopy , stereochemistry , organic chemistry , dna , biochemistry
Abstract The self‐assembly of eight Pd II cations and sixteen phenanthrene‐derived bridging ligands with 60° bite angles yielded a novel M 8 L 16 metallosupramolecular architecture composed of two interlocked D 4 h ‐symmetric barrel‐shaped containers. Mass spectrometry, NMR spectroscopy, and X‐ray analysis revealed this self‐assembled structure to be a very large “Hopf link” catenane featuring channel‐like cavities, which are occupied by NO 3 − anions. The importance of the anions as catenation templates became imminent when we observed the nitrate‐triggered structural rearrangement of a mixture of M 3 L 6 and M 4 L 8 assemblies formed in the presence of BF 4 − anions into the same interlocked molecule. Furthermore, the densely packed structure of the M 8 L 16 catenane was exploited in the preparation of a hexyloxy‐functionalized analogue, which further self‐assembled into vesicle‐like aggregates in a reversible manner.