Room-Temperature Magnetic Bistability in a Salt of Organic Radical Ions
Taponen, A. I., Ayadi, A., Lahtinen, M. K., Oyarzabal, I., Bonhommeau, S., Rouzières, M., Mathonière, C., Tuononen, H. M., Clérac, R., & Mailman, A. (2021). Room-Temperature Magnetic Bistability in a Salt of Organic Radical Ions. Journal of the American Chemical Society, 143(39), 15912-15917. https://doi.org/10.1021/jacs.1c07468
Published inJournal of the American Chemical Society
© 2021 The Authors. Published by American Chemical Society
Cocrystallization of 7,7′,8,8′-tetracyanoquinodimethane radical anion (TCNQ–•) and 3-methylpyridinium-1,2,3,5-dithiadiazolyl radical cation (3-MepyDTDA+•) afforded isostructural acetonitrile (MeCN) or propionitrile (EtCN) solvates containing cofacial π dimers of homologous components. Loss of lattice solvent from the diamagnetic solvates above 366 K affords a high-temperature paramagnetic phase containing discrete TCNQ–• and weakly bound π dimers of 3-MepyDTDA+•, as evidenced by X-ray diffraction methods and magnetic susceptibility measurements. Below 268 K, a first-order phase transition occurs, leading to a low-temperature diamagnetic phase with TCNQ–• σ dimer and π dimers of 3-MepyDTDA+•. This study reveals the first example of cooperative interactions between two different organic radical ions leading to magnetic bistability, and these results are central to the future design of multicomponent functional molecular materials.
PublisherAmerican Chemical Society (ACS)
ISSN Search the Publication Forum0002-7863
Publication in research information system
MetadataShow full item record
Related funder(s)Academy of Finland
Funding program(s)Research costs of Academy Research Fellow, AoF; Academy Research Fellow, AoF; Academy Project, AoF
Additional information about fundingA.M. and H.M.T. thank the Academy of Finland for funding (Projects 333565, 336456, and 289172). R.C., C.M., M.R., and I.O. received funding from the University of Bordeaux, the Region Nouvelle Aquitaine, Quantum Matter Bordeaux, and the Centre National de la Recherche Scientifique (CNRS). Raman measurements were performed at the SIV platform funded by the European Union (FEDER) and the Nouvelle Aquitaine Region. ...
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