University of Oulu

N. Mavragani, D. Errulat, D. A. Gálico, A. A. Kitos, A. Mansikkamäki, M. Murugesu, Angew. Chem. Int. Ed. 2021, 60, 24206.

Radical bridged Ln₄ metallocene complexes with strong magnetic coupling and large coercive field

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Author: Mavragani, Niki1; Errulat, Dylan1; Gálico, Diogo A.1;
Organizations: 1Department of Chemistry and Biomolecular Sciences, University of Ottawa 10 Marie Curie, Ottawa, Ontario, K1N 6N5 (Canada)
2NMR Research Unit, University of Oulu P.O. Box 300, 90014 Oulu (Finland)
Format: article
Version: accepted version
Access: open
Online Access: PDF Full Text (PDF, 5 MB)
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Language: English
Published: John Wiley & Sons, 2021
Publish Date: 2022-08-24


Inducing magnetic coupling between 4f elements is an ongoing challenge. To overcome this formidable difficulty, we incorporate highly delocalized tetrazinyl radicals, which strongly couple with f-block metallocenes to form discrete tetranuclear complexes. Synthesis, structure, magnetic properties of two tetranuclear [(Cp*₂Ln)₄(tz)₄]·3(C₆H₆) (Cp* = pentamethylcyclopentadienyl; tz = 1,2,4,5-tetrazine; Ln = Dy, Gd) complexes are reported. An in-depth examination of their magnetic properties through magnetic susceptibility measurements, as well as computational studies, support a highly sought-after radical-induced “giant-spin” model. Strong exchange interactions between the LnIII ions and tz radicals lead to a strong magnet-like behaviour in this molecular magnet with a giant coercive field of 30 kOe.

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Series: Angewandte Chemie. International edition in English
ISSN: 1433-7851
ISSN-E: 1521-3773
ISSN-L: 1433-7851
Volume: 60
Issue: 45
Pages: 24206 - 24213
DOI: 10.1002/anie.202110813
Type of Publication: A1 Journal article – refereed
Field of Science: 114 Physical sciences
116 Chemical sciences
Funding: We thank the University of Ottawa, the CFI, the NSERC for financial support of this work. A.M. acknowledges the funding provided by the Academy of Finland (grant no. 332294) and the University of Oulu (Kvantum Institute).
Academy of Finland Grant Number: 332294
Detailed Information: 332294 (Academy of Finland Funding decision)
Copyright information: © 2021 Wiley-VCH GmbH. This is the peer reviewed version of the following article: N. Mavragani, D. Errulat, D. A. Gálico, A. A. Kitos, A. Mansikkamäki, M. Murugesu, Angew. Chem. Int. Ed. 2021, 60, 24206, which has been published in final form at This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited.