Cooperativity of steric bulk and H-bonding in coordination sphere engineering: heteroleptic PdII cages and bowls by design.
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Publication Date
2022-02-09Journal Title
Chem Sci
ISSN
2041-6520
Publisher
Royal Society of Chemistry (RSC)
Volume
13
Issue
6
Pages
1829-1834
Type
Article
This Version
VoR
Physical Medium
Electronic-eCollection
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Chen, B., Holstein, J. J., Platzek, A., Schneider, L., Wu, K., & Clever, G. H. (2022). Cooperativity of steric bulk and H-bonding in coordination sphere engineering: heteroleptic PdII cages and bowls by design.. Chem Sci, 13 (6), 1829-1834. https://doi.org/10.1039/d1sc06931d
Abstract
Recently developed self-assembly strategies allow to rationally reduce the symmetry of metallosupramolecular architectures. In addition, the combination of multiple ligand types without creating compound mixtures has become possible. Among several approaches to realize non-statistical heteroleptic assembly, Coordination Sphere Engineering (CSE) makes use of secondary repulsive or attractive interactions in direct vicinity of the metal nodes. Previously, we used steric congestion to turn dinuclear [Pd2L4] cages with fourfold symmetry into [Pd2L3X2] (X = solvent, halide) bowl structures. Here, we introduce a new subtype of this strategy based on balancing hydrogen bonding and repulsive interactions between ligands carrying quinoline (LQu) and 1,8-naphthyridine (LNa) donors to generate trans-[Pd2L2] and [Pd2L3L'] cages, assisted by templation of encapsulated fullerenes. Combined with steric congestion caused by acridine (LAc) donors, we further report the first example of a heteroleptic [Pd2L2L'X2] bowl. Formation, structure and fullerene binding ability of these metallo-supramolecular hosts were studied by NMR, mass spectrometry and single crystal X-ray diffraction.
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External DOI: https://doi.org/10.1039/d1sc06931d
This record's URL: https://www.repository.cam.ac.uk/handle/1810/336119
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