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Terminal Ligand and Packing Effects on Slow Relaxation in an Isostructural Set of [Dy(H2 dapp)X2 ]+ Single Molecule Magnets*.
Pfleger, Rouven F; Schlittenhardt, Sören; Merkel, Marcel P; Ruben, Mario; Fink, Karin; Anson, Christopher E; Bendix, Jesper; Powell, Annie K.
Afiliación
  • Pfleger RF; Institute of Inorganic Chemistry, Karlsruhe Institute of Technology, Engesserstraße 15, 76131, Karlsruhe, Germany.
  • Schlittenhardt S; Institute of Nanotechnology (INT), Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany.
  • Merkel MP; Institute of Nanotechnology (INT), Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany.
  • Ruben M; Institute of Nanotechnology (INT), Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany.
  • Fink K; Institut de Science et d'Ingénierie Supramoléculaires (ISIS, UMR 7006), CNRS-Université de Strasbourg, 8 allée Gaspard Monge, BP 70028, 67083, Strasbourg Cedex, France.
  • Anson CE; Institute of Nanotechnology (INT), Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany.
  • Bendix J; Institute of Inorganic Chemistry, Karlsruhe Institute of Technology, Engesserstraße 15, 76131, Karlsruhe, Germany.
  • Powell AK; Department of Chemistry, University of Copenhagen, Universitetparken 5, 2100, Copenhagen, Denmark.
Chemistry ; 27(61): 15085-15094, 2021 Nov 02.
Article en En | MEDLINE | ID: mdl-34597423
We report three structurally related single ion Dy compounds using the pentadentate ligand 2,6-bis((E)-1-(2-(pyridin-2-yl)-hydrazineylidene)ethyl)pyridine (H2 dapp) [Dy(H2 dapp)(NO3 )2 ]NO3 (1), [Dy(H2 dapp)(OAc)2 ]Cl (2) and [Dy(H2 dapp)(NO3 )2 ]Cl0.92 (NO3 )0.08 (3). The (H2 dapp) occupies a helical twisted pentagonal equatorial arrangement with two anionic ligands in the axial positions. Further influence on the electronic and magnetic structure is provided by a closely associated counterion interacting with the central N-H group of the (H2 dapp). The slow relaxation of the magnetisation shows that the anionic acetates give the greatest slowing down of the magnetisation reversal. Further influence on the relaxation properties of compounds1 and 2 is the presence of short nitrate-nitrate intermolecular ligand contact opening further lattice relaxation pathways.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Chemistry Asunto de la revista: QUIMICA Año: 2021 Tipo del documento: Article País de afiliación: Alemania Pais de publicación: Alemania
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Chemistry Asunto de la revista: QUIMICA Año: 2021 Tipo del documento: Article País de afiliación: Alemania Pais de publicación: Alemania