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Rare earth stibolyl and bismolyl sandwich complexes

Author

Listed:
  • Noah Schwarz

    (Karlsruhe Institute of Technology Kaiserstrasse 12)

  • Florian Bruder

    (Philipps-Universität Marburg Hans-Meerwein-Straße 4)

  • Valentin Bayer

    (University of Stuttgart Pfaffenwaldring 55
    University of Stuttgart Pfaffenwaldring 55)

  • Eufemio Moreno-Pineda

    (Depto. de Química-Física
    Grupo de Investigación de Materiales
    Karlsruhe Institute of Technology Kaiserstrasse 12)

  • Sebastian Gillhuber

    (Karlsruhe Institute of Technology Kaiserstrasse 12)

  • Xiaofei Sun

    (Karlsruhe Institute of Technology Kaiserstrasse 12)

  • Joris Slageren

    (University of Stuttgart Pfaffenwaldring 55)

  • Florian Weigend

    (Philipps-Universität Marburg Hans-Meerwein-Straße 4)

  • Peter W. Roesky

    (Karlsruhe Institute of Technology Kaiserstrasse 12
    Karlsruhe Institute of Technology Kaiserstrasse 12)

Abstract

The design of molecular rare earth complexes to achieve unique magnetic and bonding properties is a growing area of research with possible applications in advanced materials and molecular magnetics. Recent efforts focus on developing ligand frameworks that can enhance magnetic characteristics. Here we show the synthesis and characterization of a class of rare earth complexes, [(η5-C4R4Sb)Ln(η8-C8H8)] and [(η5-C4R4Bi)Ln(η8-C8H8)], featuring η5-coordinated stibolyl and bismolyl ligands. The ligand aromaticity and bonding situation within these complexes are investigated by quantum chemical calculations. Magnetic studies of the ErIII analogues reveal large barriers and intriguing properties, including waist-restricted hysteresis and slow relaxation of the magnetization, making them single-molecule magnets. Comparison between the experimental barrier and CASSCF-SO calculations indicates that relaxation in all systems occurs through high-energy excited states. These findings suggest that stibolyl and bismolyl ligands can be promising candidates for achieving high-energy barriers in Er-based SMMs, offering a pathway to molecular designs with enhanced magnetic properties.

Suggested Citation

  • Noah Schwarz & Florian Bruder & Valentin Bayer & Eufemio Moreno-Pineda & Sebastian Gillhuber & Xiaofei Sun & Joris Slageren & Florian Weigend & Peter W. Roesky, 2025. "Rare earth stibolyl and bismolyl sandwich complexes," Nature Communications, Nature, vol. 16(1), pages 1-11, December.
    • Handle: RePEc:nat:natcom:v:16:y:2025:i:1:d:10.1038_s41467-024-55474-6
    DOI: 10.1038/s41467-024-55474-6
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    1. Yvonne Rechkemmer & Frauke D. Breitgoff & Margarethe van der Meer & Mihail Atanasov & Michael Hakl & Milan Orlita & Petr Neugebauer & Frank Neese & Biprajit Sarkar & Joris van Slageren, 2016. "A four-coordinate cobalt(II) single-ion magnet with coercivity and a very high energy barrier," Nature Communications, Nature, vol. 7(1), pages 1-8, April.
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