Research output: Contribution to journal › Article › peer-review
Ferromagnetically Coupled S=1 Chains in Crystals of Verdazyl-Nitronyl Nitroxide Diradicals. / Tretyakov, Evgeny V.; Zhivetyeva, Svetlana I.; Kazantsev, Maxim S. et al.
In: Advanced Materials, Vol. 132, No. 46, 2020, p. 20885-20891.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Ferromagnetically Coupled S=1 Chains in Crystals of Verdazyl-Nitronyl Nitroxide Diradicals
AU - Tretyakov, Evgeny V.
AU - Zhivetyeva, Svetlana I.
AU - Kazantsev, Maxim S.
AU - Shundrina, Inna K.
AU - Zaytseva, Elena V.
AU - Parkhomenko, Dmitriy A.
AU - Bagryanskaya, Elena G.
AU - Gorbunov, Dmitry E.
AU - Bagryanskaya, Irina Yu
AU - Petunin, Pavel V.
AU - Postnikov, Pavel S.
AU - Trusova, Marina E.
AU - Gritsan, Nina P.
AU - Bogomyakov, Artem S.
AU - Ovcharenko, Victor I.
AU - Postnikov, Pavel S.
N1 - Funding Information: This research was supported by the Ministry of Science and Higher Education of the Russian Federation (State Project „Science“ No. FSWW-2020-0011) and the Russian Science Foundation (grant No. 18-13-00173, synthesis and characterization). A.S.B. and V.I.O. are thankful to the Russian Science Foundation (grant No. 18-13-00380, magnetochemistry). D.E.G. and N.P.G. acknowledge support of the Ministry of Science and Higher Education of the Russian Federation (project No. 0304-2017-0008) and the Irkutsk Supercomputer Centre of the Siberian Branch of the Russian Academy of Sciences for computational resources. The authors would like to acknowledge the Multi-Access Chemical Research Center SB RAS for spectral and analytical measurements. Publisher Copyright: © 2020 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.
PY - 2020
Y1 - 2020
N2 - Thermally stable organic diradicals with a triplet ground state along with large singlet-triplet energy gap have significant potential for advanced technological applications. A series of phenylene-bridged diradicals with oxoverdazyl and nitronyl nitroxide units were synthesized via a palladiumcatalyzed cross-coupling reaction of iodoverdazyls with a nitronyl nitroxide-2-ide gold(I) complex with high yields. The diradicals exhibit high stability and do not decompose in an inert atmosphere up to 180°C. For the diradicals, both substantial AF (∆EST≈-64 cm-1) and FM (∆EST≥ 25 and 100 cm-1) intramolecular exchange interactions were observed. The sign of the exchange interaction is determined both by the bridging moiety (para- or meta-phenylene) and by the type of oxoverdazyl block (C-linked or N-linked). Upon crystallization, diradicals with the triplet ground state form unique onedimensional exchange-coupled chains with strong intra- and weak inter-diradical ferromagnetic coupling.
AB - Thermally stable organic diradicals with a triplet ground state along with large singlet-triplet energy gap have significant potential for advanced technological applications. A series of phenylene-bridged diradicals with oxoverdazyl and nitronyl nitroxide units were synthesized via a palladiumcatalyzed cross-coupling reaction of iodoverdazyls with a nitronyl nitroxide-2-ide gold(I) complex with high yields. The diradicals exhibit high stability and do not decompose in an inert atmosphere up to 180°C. For the diradicals, both substantial AF (∆EST≈-64 cm-1) and FM (∆EST≥ 25 and 100 cm-1) intramolecular exchange interactions were observed. The sign of the exchange interaction is determined both by the bridging moiety (para- or meta-phenylene) and by the type of oxoverdazyl block (C-linked or N-linked). Upon crystallization, diradicals with the triplet ground state form unique onedimensional exchange-coupled chains with strong intra- and weak inter-diradical ferromagnetic coupling.
KW - ferromagnetically coupled chain
KW - high-spin molecules
KW - nitroxides
KW - triplet diradicals
KW - verdazyl radicals
UR - http://www.scopus.com/inward/record.url?scp=85136211221&partnerID=8YFLogxK
U2 - 10.1002/ANGE.202010041
DO - 10.1002/ANGE.202010041
M3 - Article
AN - SCOPUS:85136211221
VL - 132
SP - 20885
EP - 20891
JO - Advanced Materials
JF - Advanced Materials
SN - 0935-9648
IS - 46
ER -
ID: 37000366