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Slow Magnetization Relaxation in a Family of Triangular {CoIII 2 LnIII } Clusters: The Effect of Diamagnetic CoIII Ions on the LnIII Magnetic Dynamics.
Armenis, Alexandros S; Vipanchi, Vikram; Pantelis, Konstantinos N; Cunha-Silva, Luís; Vignesh, Kuduva R; Alexandropoulos, Dimitris I; Stamatatos, Theocharis C.
Afiliación
  • Armenis AS; Department of Chemistry, University of Patras, 265 04, Patras, Greece.
  • Vipanchi V; Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali Sector-81, Knowledge city, S.A.S. Nagar, Mohali, 140306, Punjab, India.
  • Pantelis KN; Department of Chemistry, University of Patras, 265 04, Patras, Greece.
  • Cunha-Silva L; LAQV/REQUIMTE & Department of Chemistry and Biochemistry, Faculty of Sciences, University of Porto, 4169-007, Porto, Portugal.
  • Vignesh KR; Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali Sector-81, Knowledge city, S.A.S. Nagar, Mohali, 140306, Punjab, India.
  • Alexandropoulos DI; Department of Chemistry, University of Patras, 265 04, Patras, Greece.
  • Stamatatos TC; Department of Chemistry, University of Patras, 265 04, Patras, Greece.
Chemistry ; 29(65): e202302337, 2023 Nov 21.
Article en En | MEDLINE | ID: mdl-37638486
The first use of the Schiff base chelate N-naphthalidene-o-aminophenol (naphH2 ) in Co/Ln chemistry has afforded a family of isostructural [CoIII 2 LnIII (OMe)2 (naph)2 (O2 CMe)3 (MeOH)2 ] (Ln=Tb, Dy and Er) complexes, revealing a rare {CoIII 2 Ln(µ3 -OMe)}8+ triangular core composed of two diamagnetic CoIII ions and a 4f-ion with slightly distorted square antiprismatic geometry. Alternating current (ac) magnetic susceptibility studies revealed that {Co2 Dy}, and its magnetic diluted analogue {Co2 Dy0.05 Y0.95 }, behave as mononuclear single-molecule magnets (SMMs) with similar energy barriers for the magnetization reversal, Ueff , of ~85-90 K. SMM properties were also detected for {Co2 Er}, with the compound exhibiting a Ueff of 18.7 K under an applied magnetic field of 800 Oe. To interpret the experimental magnetic results, ab initio CASSCF/RASSI-SO and DFT calculations were performed as a means of exploring the single-ion characteristics of LnIII ions and comprehend the role of the diamagnetic CoIII ions in the magnetization relaxation of the three heterometallic compounds.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Chemistry Asunto de la revista: QUIMICA Año: 2023 Tipo del documento: Article País de afiliación: Grecia 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: 2023 Tipo del documento: Article País de afiliación: Grecia Pais de publicación: Alemania