NDLI: Facile Interchange of 3d and 4f Ions in Single-Molecule Magnets: Stepwise Assembly of $[Mn_{4}],$ $[Mn_{3}Ln]$ and $[Mn_{2}Ln_{2}]$ Cages within Calix[4]arene Scaffolds

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Facile Interchange of 3d and 4f Ions in Single-Molecule Magnets: Stepwise Assembly of $[Mn_{4}],$ $[Mn_{3}Ln]$ and $[Mn_{2}Ln_{2}]$ Cages within Calix[4]arene Scaffolds

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Teat, Simon J. Weihe, Høgni Piligkos, Stergios Brechin, Euan K. Mclellan, Ross Dalgarno, Scott J. Palacios, Maria A. Beavers, Christine M.
Description	Author Affiliation: Palacios MA ( EaStCHEM School of Chemistry, The University of Edinburgh, David Brewster Road, Edinburgh EH9 3FJ (UK).); McLellan R ( Institute of Chemical Sciences, Heriot-Watt University, Riccarton, Edinburgh, Scotland EH14 4AS (UK).); Beavers CM ( Lawrence Berkeley National Laboratory, 1â Cyclotron Road, MS 6R2100, Berkeley, California 94720 (USA).); Teat SJ ( Lawrence Berkeley National Laboratory, 1â Cyclotron Road, MS 6R2100, Berkeley, California 94720 (USA).); Weihe H ( Department of Chemistry, University of Copenhagen, Universitetsparkenâ 5, 2100 (Denmark).); Piligkos S ( Department of Chemistry, University of Copenhagen, Universitetsparkenâ 5, 2100 (Denmark). piligkos@kiku.dk.); Dalgarno SJ ( Institute of Chemical Sciences, Heriot-Watt University, Riccarton, Edinburgh, Scotland EH14 4AS (UK). S.J.Dalgarno@hw.ac.uk.); Brechin EK ( EaStCHEM School of Chemistry, The University of Edinburgh, David Brewster Road, Edinburgh EH9 3FJ (UK). E.Brechin@ed.ac.uk.)
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”.
ISSN	09476539
e-ISSN	15213765
Journal	Chemistry - A European Journal
Issue Number	31
Volume Number	21
Language	English
Publisher	Wiley-VCH;ChemPubSoc Europe
Publisher Date	2015-07-27
Publisher Place	Germany
Access Restriction	Open
Subject Keyword	Chemistry
Content Type	Text
Resource Type	Article
Subject	Organic Chemistry Catalysis

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