Self-Assembly Synthesis of a [2]Catenane Co II Single-Molecule Magnet.

Autor: Wilson BH; MacDiarmid Institute for Advanced Materials and Nanotechnology, School of Physical and Chemical Sciences, University of Canterbury, Private Bag 4800, Christchurch, 8041, New Zealand.; Current address, Bernal Institute, University of Limerick, Limerick, V94 T9PX, Ireland., Ward JS; MacDiarmid Institute for Advanced Materials and Nanotechnology, School of Physical and Chemical Sciences, University of Canterbury, Private Bag 4800, Christchurch, 8041, New Zealand., Young DC; MacDiarmid Institute for Advanced Materials and Nanotechnology, School of Physical and Chemical Sciences, University of Canterbury, Private Bag 4800, Christchurch, 8041, New Zealand., Liu JL; Univ. Bordeaux, CNRS, Centre de Recherche Paul Pascal, UMR 5031, 33600, Pessac, France., Mathonière C; Univ. Bordeaux, CNRS, Centre de Recherche Paul Pascal, UMR 5031, 33600, Pessac, France., Clérac R; Univ. Bordeaux, CNRS, Centre de Recherche Paul Pascal, UMR 5031, 33600, Pessac, France., Kruger PE; MacDiarmid Institute for Advanced Materials and Nanotechnology, School of Physical and Chemical Sciences, University of Canterbury, Private Bag 4800, Christchurch, 8041, New Zealand.
Jazyk: angličtina
Zdroj: Angewandte Chemie (International ed. in English) [Angew Chem Int Ed Engl] 2022 Jan 21; Vol. 61 (4), pp. e202113837. Date of Electronic Publication: 2021 Dec 09.
DOI: 10.1002/anie.202113837
Abstrakt: We describe herein the self-assembly synthesis of an octanuclear Co II [2]catenane {[Co 4 (H 2 L) 6 ] 2 16+ } formed by the mechanical interlocking of two {[Co 4 (H 2 L) 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.
(© 2021 Wiley-VCH GmbH.)
Databáze: MEDLINE
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