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Terminal Ligand and Packing Effects on Slow Relaxation in an Isostructural Set of [Dy(H$_{2}$dapp)X$_{2}$]+ Single Molecule Magnets**

Pfleger, R. F. ORCID iD icon 1; Schlittenhardt, S. 2; Merkel, M. P. 2; Ruben, M. 2; Fink, K. ORCID iD icon 2; Anson, C. E. 1; Bendix, J.; Powell, A. K. 1,3
1 Institut für Anorganische Chemie (AOC), Karlsruher Institut für Technologie (KIT)
2 Karlsruher Institut für Technologie (KIT)
3 Institut für QuantenMaterialien und Technologien (IQMT), Karlsruher Institut für Technologie (KIT)


Three new dysprosium complexes with a pentadentate ligand occupying five equatorial sites differ only in the nature of the axial ligands. These help tune the relaxation properties as judged by an analysis of the AC susceptibility data. More in depth analysis by using two recently suggested fitting equations lead to similar outcomes for all three systems. As a further contribution to the relaxation pathway involving the phonon bath it is concluded that a short nitrate-nitrate interaction between molecules helps dampen the spin phonon coupling.
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 (H$_{2}$dapp) [Dy(H$_{2}$dapp)(NO$_{3}$)$_{2}$]NO$_{3}$ (1), [Dy(H$_{2}$dapp)(OAc)$_{2}$]Cl (2) and [Dy(H$_{2}$dapp)(NO$_{3}$)$_{2}$]Cl$_{0.92}$(NO$_{3}$)$_{0.08}$ (3). The (H$_{2}$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 (H$_{2}$dapp). ... mehr

Verlagsausgabe §
DOI: 10.5445/IR/1000139379
Veröffentlicht am 29.10.2021
DOI: 10.1002/chem.202102918
Zitationen: 3
Web of Science
Zitationen: 3
Zitationen: 7
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Nanotechnologie (INT)
Institut für QuantenMaterialien und Technologien (IQMT)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2021
Sprache Englisch
Identifikator ISSN: 0947-6539, 1521-3765
KITopen-ID: 1000139379
HGF-Programm 47.12.02 (POF IV, LK 01) Exploratory Qubits
Erschienen in Chemistry - A European Journal
Verlag John Wiley and Sons
Band 27
Heft 61
Seiten 15086-15095
Vorab online veröffentlicht am 01.10.2021
Nachgewiesen in Scopus
Web of Science
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