Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 61, Issue 4, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202113837
Keywords
Catenane; Coordination Chemistry; Mechanically Interlocked Molecules; Single Molecule Magnetism; Supramolecular Chemistry
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Funding
- Royal Society of New Zealand Marsden Fund
- Dumont d'Urville NZFrance Science & Technology Support Programme
- New Zealand France Friendship Fund
- MacDiarmid Institute
- University of Bordeaux
- CNRS
- Region Nouvelle Aquitaine
- Roper Scholarship (UC)
- Quantum Matter Bordeaux program
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This study describes the self-assembly synthesis of an octanuclear Co-II [2]catenane with unique magnetic properties. By manipulating the synthetic conditions, a mixed-valence non-catenated rectangle can also be obtained. The work demonstrates the precise control of single-molecule magnets in complex arrangements through metallo-supramolecular chemistry.
We describe herein the self-assembly synthesis of an octanuclear Co-II [2]catenane {[Co-4(H2L)(6)](2)(16+)} formed by the mechanical interlocking of two {[Co-4(H2L)(6)](8+)} rectangles of unprecedented topology. Subtle manipulation of the synthetic conditions allows the isolation of a mixed-valence [Co-2(III)/Co-2(II)](10+) non-catenated rectangle. The Co-II centers in the [2]catenane exhibit slow relaxation of their magnetic moment, i. e. single-molecule magnet properties, dominated by quantum tunneling and Raman relaxation processes. This work shows that metallo-supramolecular chemistry can precisely control the organization of single-molecule magnets in topologically complex arrangements.
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