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Ferromagnetic Chain Based on Verdazyl-Nitroxide Diradical

submitted on 25.05.2020, 17:28 and posted on 27.05.2020, 08:30 by Evgeny Tretyakov, Svetlana Zhivetyeva, Pavel Petunin, Dmitry Gorbunov, Nina Gritsan, Irina Bagryanskaya, Artem Bogomyakov, Pavel Postnikov, Maxim Kazantsev, Marina Trusova, Inna Shundrina, Elena Zaytseva, Dmitriy Parkhomenko, Elena Bagryanskaya, Victor Ovcharenko

Verdazyl-nitroxide diradicals were synthesized using the palladium-catalyzed cross-coupling reaction of the corresponding iodoverdazyls with a nitronyl nitroxide-2-ide gold(I) complex with high yields (up to 82%). The synthesized diradicals were found to be highly thermally stable and have a singlet (DEST » -64 cm–1) or triplet ground state (DEST ³ 25 and 100 cm–1), depending on which canonical hydrocarbon diradical type they belong to. Upon crystallization, triplet diradicals form unique one-dimensional (1D) spin S = 1 chains of organic diradicals with intrachain ferromagnetic coupling of J′/kB from 3 to 6 K.


Ministry of Science and Higher Education of the Russian Federation (State Project “Science” №FSWW-2020-0011)

Russian Science Foundation (grant No. 18-13-00173)

Ministry of Higher Education and Science of the Russian Federation (project 0304-2017-0008)

Russian Science Foundation (grant No. 18-13-00380)


Email Address of Submitting Author


Tomsk Polytechnic University



ORCID For Submitting Author


Declaration of Conflict of Interest

Authors do not declare any conflict of interest