Stereo sensitivity of exchange interactions in NiII and CuII heterospin complexes with 5-formylpyrrolyl-substituted nitroxides
- Authors: Zueva E.M.1, Tretyakov E.V.2, Fokin S.V.2, Romanenko G.V.2, Tkacheva A.O.2, Bogomyakov A.S.2, Petrova O.V.3, Trofimov B.A.3, Sagdeev R.Z.4, Ovcharenko V.I.2
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Affiliations:
- Kazan National Technological University
- International Tomography Center, Siberian Branch of the Russian Academy of Sciences
- A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences
- Kazan (Volga region) Federal University
- Issue: Vol 65, No 3 (2016)
- Pages: 666-674
- Section: Full Articles
- URL: https://journals.rcsi.science/1066-5285/article/view/237439
- DOI: https://doi.org/10.1007/s11172-016-1353-8
- ID: 237439
Cite item
Abstract
5-Formylpyrrolyl-substituted nitronyl and imino nitroxide radicals HL1 and HL2 were synthesized. Their solid phases are formed by packing pairs of the molecules. In the {HL1...HL1} pairs, the dominant interaction is the ferromagnetic exchange with J/kB = 8.8 K (Hamiltonian \(H = 2J\left( {\overrightarrow {{s_1}} \overrightarrow {{s_2}} } \right)\)). The ferromagnetic exchange occurs also in the heterospin molecules [Ni(L1)2], [Cu(L1)2], and [Ni(L2)2(MeOH)2]. In the complexes [Ni(L1)2] and [Cu(L1)2], a small change in the mutual orientation of the coordinated ligands has a considerable effect on the value and the sign of the energy of exchange interactions between the unpaired electrons of the metal ion and paramagnetic ligands.
About the authors
E. M. Zueva
Kazan National Technological University
Email: Victor.Ovcharenko@tomo.nsc.ru
Russian Federation, 68 ul. K. Marksa, Kazan, 420015
E. V. Tretyakov
International Tomography Center, Siberian Branch of the Russian Academy of Sciences
Email: Victor.Ovcharenko@tomo.nsc.ru
Russian Federation, 3a ul. Institutskaya, Novosibirsk, 630090
S. V. Fokin
International Tomography Center, Siberian Branch of the Russian Academy of Sciences
Email: Victor.Ovcharenko@tomo.nsc.ru
Russian Federation, 3a ul. Institutskaya, Novosibirsk, 630090
G. V. Romanenko
International Tomography Center, Siberian Branch of the Russian Academy of Sciences
Email: Victor.Ovcharenko@tomo.nsc.ru
Russian Federation, 3a ul. Institutskaya, Novosibirsk, 630090
A. O. Tkacheva
International Tomography Center, Siberian Branch of the Russian Academy of Sciences
Email: Victor.Ovcharenko@tomo.nsc.ru
Russian Federation, 3a ul. Institutskaya, Novosibirsk, 630090
A. S. Bogomyakov
International Tomography Center, Siberian Branch of the Russian Academy of Sciences
Email: Victor.Ovcharenko@tomo.nsc.ru
Russian Federation, 3a ul. Institutskaya, Novosibirsk, 630090
O. V. Petrova
A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences
Email: Victor.Ovcharenko@tomo.nsc.ru
Russian Federation, 1 ul. Favorskogo, Irkutsk, 664033
B. A. Trofimov
A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences
Email: Victor.Ovcharenko@tomo.nsc.ru
Russian Federation, 1 ul. Favorskogo, Irkutsk, 664033
R. Z. Sagdeev
Kazan (Volga region) Federal University
Email: Victor.Ovcharenko@tomo.nsc.ru
Russian Federation, 18 ul. Kremlevskaya, Kazan, 420008
V. I. Ovcharenko
International Tomography Center, Siberian Branch of the Russian Academy of Sciences
Author for correspondence.
Email: Victor.Ovcharenko@tomo.nsc.ru
Russian Federation, 3a ul. Institutskaya, Novosibirsk, 630090