Persistent compensated ferrimagnetism in the molecular framework Cr(pyrazine)3

Frédéric Aribot; Maja A. Dunstan; Nathan J. Yutronkie; Mariusz Kubus; Luis Leyva-Parra; Anton Viborg; Susanne Mossin; Fabrice Wilhelm; Vivian Nassif; Dawid Pinkowicz; Wiktor Wolański; Lukas B. Woodcock; Stergios Piligkos; Jesper Bendix; Sebastian E. Reyes-Lillo; Andrei Rogalev; Kasper S. Pedersen

doi:10.1038/s41557-026-02131-8

Persistent compensated ferrimagnetism in the molecular framework Cr(pyrazine)₃

Frédéric Aribot
, Maja A. Dunstan
, Nathan J. Yutronkie
, Mariusz Kubus
, Luis Leyva-Parra
, Anton Viborg
, Susanne Mossin
, Fabrice Wilhelm
, Vivian Nassif
, Dawid Pinkowicz
, Wiktor Wolański
, Lukas B. Woodcock
, Stergios Piligkos
, Jesper Bendix
, Sebastian E. Reyes-Lillo
, Andrei Rogalev
, Kasper S. Pedersen^*

^*Corresponding author for this work

European Synchrotron Radiation Facility
Universidad Andrés Bello
Université Grenoble Alpes
Jagiellonian University in Kraków
University of Copenhagen

Research output: Contribution to journal › Journal article › Research › peer-review

Abstract

Molecular frameworks with ReO₃- or perovskite-related topologies have been widely investigated for their structural versatility, yet examples displaying strong electronic and magnetic correlations have not been realized in such systems. Here we report the synthesis of Cr(pyrazine)₃, a three-dimensional molecular framework adopting a cubic ReO₃-type structure, in which Cr³⁺ ions are bridged exclusively by pyrazine radical anions. In Cr(pyrazine)₃, antiferromagnetic coupling between the Cr³⁺ and radical sublattices, comparable in magnitude to that found in transition-metal oxides, leads to a nearly perfectly compensated ferrimagnetic ground state with an exceptionally small net magnetic moment. Owing to the symmetry and stoichiometry of the bipartite lattice, magnetic compensation persists over an extended temperature range rather than occurring only at a specific compensation temperature. Long-range magnetic order is observed well above room temperature, placing Cr(pyrazine)₃ among the very few materials featuring robust compensated ferrimagnetism under ambient conditions.

Original language	English
Journal	Nature Chemistry
Number of pages	9
ISSN	1755-4330
DOIs	https://doi.org/10.1038/s41557-026-02131-8
Publication status	Accepted/In press - 2026

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Aribot, F., Dunstan, M. A., Yutronkie, N. J., Kubus, M., Leyva-Parra, L., Viborg, A., Mossin, S., Wilhelm, F., Nassif, V., Pinkowicz, D., Wolański, W., Woodcock, L. B., Piligkos, S., Bendix, J., Reyes-Lillo, S. E., Rogalev, A., & Pedersen, K. S. (Accepted/In press). Persistent compensated ferrimagnetism in the molecular framework Cr(pyrazine)₃. Nature Chemistry. https://doi.org/10.1038/s41557-026-02131-8

@article{c780971788af438794b6eb48c5d84023,

title = "Persistent compensated ferrimagnetism in the molecular framework Cr(pyrazine)3",

abstract = "Molecular frameworks with ReO3- or perovskite-related topologies have been widely investigated for their structural versatility, yet examples displaying strong electronic and magnetic correlations have not been realized in such systems. Here we report the synthesis of Cr(pyrazine)3, a three-dimensional molecular framework adopting a cubic ReO3-type structure, in which Cr3+ ions are bridged exclusively by pyrazine radical anions. In Cr(pyrazine)3, antiferromagnetic coupling between the Cr3+ and radical sublattices, comparable in magnitude to that found in transition-metal oxides, leads to a nearly perfectly compensated ferrimagnetic ground state with an exceptionally small net magnetic moment. Owing to the symmetry and stoichiometry of the bipartite lattice, magnetic compensation persists over an extended temperature range rather than occurring only at a specific compensation temperature. Long-range magnetic order is observed well above room temperature, placing Cr(pyrazine)3 among the very few materials featuring robust compensated ferrimagnetism under ambient conditions. ",

author = "Fr{\'e}d{\'e}ric Aribot and Dunstan, \{Maja A.\} and Yutronkie, \{Nathan J.\} and Mariusz Kubus and Luis Leyva-Parra and Anton Viborg and Susanne Mossin and Fabrice Wilhelm and Vivian Nassif and Dawid Pinkowicz and Wiktor Wola{\'n}ski and Woodcock, \{Lukas B.\} and Stergios Piligkos and Jesper Bendix and Reyes-Lillo, \{Sebastian E.\} and Andrei Rogalev and Pedersen, \{Kasper S.\}",

note = "Publisher Copyright: {\textcopyright} The Author(s), under exclusive licence to Springer Nature Limited 2026.",

year = "2026",

doi = "10.1038/s41557-026-02131-8",

language = "English",

journal = "Nature Chemistry",

issn = "1755-4330",

publisher = "Nature Publishing Group",

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TY - JOUR

T1 - Persistent compensated ferrimagnetism in the molecular framework Cr(pyrazine)3

AU - Aribot, Frédéric

AU - Dunstan, Maja A.

AU - Yutronkie, Nathan J.

AU - Kubus, Mariusz

AU - Leyva-Parra, Luis

AU - Viborg, Anton

AU - Mossin, Susanne

AU - Wilhelm, Fabrice

AU - Nassif, Vivian

AU - Pinkowicz, Dawid

AU - Wolański, Wiktor

AU - Woodcock, Lukas B.

AU - Piligkos, Stergios

AU - Bendix, Jesper

AU - Reyes-Lillo, Sebastian E.

AU - Rogalev, Andrei

AU - Pedersen, Kasper S.

PY - 2026

Y1 - 2026

N2 - Molecular frameworks with ReO3- or perovskite-related topologies have been widely investigated for their structural versatility, yet examples displaying strong electronic and magnetic correlations have not been realized in such systems. Here we report the synthesis of Cr(pyrazine)3, a three-dimensional molecular framework adopting a cubic ReO3-type structure, in which Cr3+ ions are bridged exclusively by pyrazine radical anions. In Cr(pyrazine)3, antiferromagnetic coupling between the Cr3+ and radical sublattices, comparable in magnitude to that found in transition-metal oxides, leads to a nearly perfectly compensated ferrimagnetic ground state with an exceptionally small net magnetic moment. Owing to the symmetry and stoichiometry of the bipartite lattice, magnetic compensation persists over an extended temperature range rather than occurring only at a specific compensation temperature. Long-range magnetic order is observed well above room temperature, placing Cr(pyrazine)3 among the very few materials featuring robust compensated ferrimagnetism under ambient conditions.

AB - Molecular frameworks with ReO3- or perovskite-related topologies have been widely investigated for their structural versatility, yet examples displaying strong electronic and magnetic correlations have not been realized in such systems. Here we report the synthesis of Cr(pyrazine)3, a three-dimensional molecular framework adopting a cubic ReO3-type structure, in which Cr3+ ions are bridged exclusively by pyrazine radical anions. In Cr(pyrazine)3, antiferromagnetic coupling between the Cr3+ and radical sublattices, comparable in magnitude to that found in transition-metal oxides, leads to a nearly perfectly compensated ferrimagnetic ground state with an exceptionally small net magnetic moment. Owing to the symmetry and stoichiometry of the bipartite lattice, magnetic compensation persists over an extended temperature range rather than occurring only at a specific compensation temperature. Long-range magnetic order is observed well above room temperature, placing Cr(pyrazine)3 among the very few materials featuring robust compensated ferrimagnetism under ambient conditions.

U2 - 10.1038/s41557-026-02131-8

DO - 10.1038/s41557-026-02131-8

M3 - Journal article

C2 - 42026170

AN - SCOPUS:105040666000

SN - 1755-4330

JO - Nature Chemistry

JF - Nature Chemistry

ER -

Persistent compensated ferrimagnetism in the molecular framework Cr(pyrazine)3

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Persistent compensated ferrimagnetism in the molecular framework Cr(pyrazine)₃