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Palacios MA, McLellan R, Beavers CM, et al. Facile interchange of 3d and 4f ions in single-molecule magnets: stepwise assembly of [Mn4 ], [Mn3Ln] and [Mn2Ln2 ] cages within calix[4]arene scaffolds. Chemistry. 2015;21(31):11212-8doi: 10.1002/chem.201500001.
Palacios, M. A., McLellan, R., Beavers, C. M., Teat, S. J., Weihe, H., Piligkos, S., Dalgarno, S. J., & Brechin, E. K. (2015). Facile interchange of 3d and 4f ions in single-molecule magnets: stepwise assembly of [Mn4 ], [Mn3Ln] and [Mn2Ln2 ] cages within calix[4]arene scaffolds. Chemistry (Weinheim an der Bergstrasse, Germany), 21(31), 11212-8. https://doi.org/10.1002/chem.201500001
Palacios, Maria A, et al. "Facile interchange of 3d and 4f ions in single-molecule magnets: stepwise assembly of [Mn4 ], [Mn3Ln] and [Mn2Ln2 ] cages within calix[4]arene scaffolds." Chemistry (Weinheim an der Bergstrasse, Germany) vol. 21,31 (2015): 11212-8. doi: https://doi.org/10.1002/chem.201500001
Palacios MA, McLellan R, Beavers CM, Teat SJ, Weihe H, Piligkos S, Dalgarno SJ, Brechin EK. Facile interchange of 3d and 4f ions in single-molecule magnets: stepwise assembly of [Mn4 ], [Mn3Ln] and [Mn2Ln2 ] cages within calix[4]arene scaffolds. Chemistry. 2015 Jul 27;21(31):11212-8. doi: 10.1002/chem.201500001. Epub 2015 Jun 29. PMID: 26121216.
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Chemistry. 2015 Jul 27;21(31):11212-8. doi: 10.1002/chem.201500001. Epub 2015 Jun 29.

Facile interchange of 3d and 4f ions in single-molecule magnets: stepwise assembly of [Mn4 ], [Mn3Ln] and [Mn2Ln2 ] cages within calix[4]arene scaffolds.

Chemistry (Weinheim an der Bergstrasse, Germany)

Maria A Palacios, Ross McLellan, Christine M Beavers, Simon J Teat, Høgni Weihe, Stergios Piligkos, Scott J Dalgarno, Euan K Brechin

Affiliations

  1. EaStCHEM School of Chemistry, The University of Edinburgh, David Brewster Road, Edinburgh EH9 3FJ (UK).
  2. Institute of Chemical Sciences, Heriot-Watt University, Riccarton, Edinburgh, Scotland EH14 4AS (UK).
  3. Lawrence Berkeley National Laboratory, 1?Cyclotron Road, MS 6R2100, Berkeley, California 94720 (USA).
  4. Department of Chemistry, University of Copenhagen, Universitetsparken?5, 2100 (Denmark).
  5. Department of Chemistry, University of Copenhagen, Universitetsparken?5, 2100 (Denmark). [email protected].
  6. Institute of Chemical Sciences, Heriot-Watt University, Riccarton, Edinburgh, Scotland EH14 4AS (UK). [email protected].
  7. EaStCHEM School of Chemistry, The University of Edinburgh, David Brewster Road, Edinburgh EH9 3FJ (UK). [email protected].

PMID: 26121216 DOI: 10.1002/chem.201500001

Abstract

The central Mn(II) ions in a series of calix[4]arene-stabilised butterflies can be sequentially replaced with Ln(III) ions, maintaining the structural integrity of the molecule but transforming its magnetic properties. The replacement of Mn(II) for Gd(III) allows for the examination of the transferability of spin-Hamiltonian parameters within the family as well as permitting their reliable determination. The introduction of the 4f ions results in weaker intramolecular magnetic exchange, an increase in the number of low-lying excited states, and an increase in magnetisation relaxation, highlighting the importance of exchange over single-ion anisotropy for the observation of SMM behaviour in this family of complexes. The presence of the [TM(II/III) (TBC[4])(OH)(solvent)] metalloligand (TM=transition metal, TBC=p-tBu-calix[4]arene) suggests that magnetic calix[n]arene building blocks can be employed to encapsulate a range of different "guests" within structurally robust "hosts".

© 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Keywords: SMMs; calixarenes; clusters; coordination chemistry; magnetism

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