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Makarov AY, Buravlev AA, Romanenko GV, Bogomyakov AS, Zakharov BA, Morozov VA, Sukhikh AS, Shundrina IK, Shundrin LA, Irtegova IG, Cherepanova SV, Bagryanskaya IY, Nikulshin PV, Zibarev AV. Hysteretic Room-Temperature Magnetic Bistability of the Crystalline 4,7-Difluoro-1,3,2-Benzodithiazolyl Radical. Chempluschem 2024:e202300736. [PMID: 38332534 DOI: 10.1002/cplu.202300736] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2023] [Revised: 02/08/2024] [Accepted: 02/08/2024] [Indexed: 02/10/2024]
Abstract
The title radical R⋅, synthesized by reduction of the corresponding cation R+ , is thermally stable up to ~380 K in the crystalline state under anaerobic conditions. With SQUID magnetometry, single-crystal and powder XRD, solid-state EPR and TG-DSC, reversible spin-Peierls transition between diamagnetic and paramagnetic states featuring ~10 K hysteretic loop is observed for R⋅ in the temperature range ~310-325 K; ΔH=~2.03 kJ mol-1 and ΔS=~6.23 J mol-1 K-1 . The transition is accompanied by mechanical movement of the crystals, i. e., by thermosalient behavior. The low-temperature diamagnetic P-1 polymorph of R⋅ consists of R⋅2 π-dimers arranged in (…R⋅2 …)n π-stacks; whereas the high-temperature paramagnetic P21 /c polymorph, of uniform (…R⋅…)n π-stacks. With the XRD geometries, CASSCF and broken-symmetry DFT jointly suggest strong antiferromagnetic (AF) interactions within R⋅2 and weak between R⋅2 for the (…R⋅2 …)n stacks; and moderate AF interactions between R⋅ for the (…R⋅…)n stacks. The fully hydrocarbon archetype of R⋅ does not reveal the aforementioned properties. Thus, the fluorinated 1,3,2-benzodithiazolyls pave a new pathway in the design and synthesis of metal-less magnetically-bistable materials.
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Affiliation(s)
- Alexander Yu Makarov
- Vorozhtsov Institute of Organic Chemistry, Siberian Branch, Russian Academy of Sciences, 630090, Novosibirsk, Russia
| | - Alexander A Buravlev
- Vorozhtsov Institute of Organic Chemistry, Siberian Branch, Russian Academy of Sciences, 630090, Novosibirsk, Russia
- Department of Natural Sciences National Research University -, Novosibirsk State University, 630090, Novosibirsk, Russia
| | - Galina V Romanenko
- International Tomography Center, Siberian Branch, Russian Academy of Sciences, 630090, Novosibirsk, Russia
| | - Artem S Bogomyakov
- International Tomography Center, Siberian Branch, Russian Academy of Sciences, 630090, Novosibirsk, Russia
| | - Boris A Zakharov
- Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences, 630090, Novosibirsk, Russia
- Department of Natural Sciences National Research University -, Novosibirsk State University, 630090, Novosibirsk, Russia
| | - Vitaly A Morozov
- International Tomography Center, Siberian Branch, Russian Academy of Sciences, 630090, Novosibirsk, Russia
| | - Alexander S Sukhikh
- Nikolaev Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences, 630090, Novosibirsk, Russia
- Department of Physics, National Research University - Novosibirsk State University, 630090, Novosibirsk, Russia
| | - Inna K Shundrina
- Vorozhtsov Institute of Organic Chemistry, Siberian Branch, Russian Academy of Sciences, 630090, Novosibirsk, Russia
| | - Leonid A Shundrin
- Vorozhtsov Institute of Organic Chemistry, Siberian Branch, Russian Academy of Sciences, 630090, Novosibirsk, Russia
| | - Irina G Irtegova
- Vorozhtsov Institute of Organic Chemistry, Siberian Branch, Russian Academy of Sciences, 630090, Novosibirsk, Russia
| | - Svetlana V Cherepanova
- Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences, 630090, Novosibirsk, Russia
| | - Irina Yu Bagryanskaya
- Vorozhtsov Institute of Organic Chemistry, Siberian Branch, Russian Academy of Sciences, 630090, Novosibirsk, Russia
| | - Pavel V Nikulshin
- Vorozhtsov Institute of Organic Chemistry, Siberian Branch, Russian Academy of Sciences, 630090, Novosibirsk, Russia
- Current address: Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, 119991, Moscow, Russia
| | - Andrey V Zibarev
- Vorozhtsov Institute of Organic Chemistry, Siberian Branch, Russian Academy of Sciences, 630090, Novosibirsk, Russia
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Tretyakov EV, Zayakin IA, Dmitriev AA, Fedin MV, Romanenko GV, Bogomyakov AS, Akyeva AY, Syroeshkin MA, Yoshioka N, Gritsan NP. A Nitronyl Nitroxide-Substituted Benzotriazinyl Tetraradical. Chemistry 2024; 30:e202303456. [PMID: 37988241 DOI: 10.1002/chem.202303456] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Revised: 11/20/2023] [Accepted: 11/21/2023] [Indexed: 11/23/2023]
Abstract
High-spin organic tetraradicals with significant intramolecular exchange interactions have high potential for advanced technological applications and fundamental research, but those synthesized to date possess limited stability and processability. In this work, we have designed a tetraradical based on the Blatter's radical and nitronyl nitroxide radical moieties and successfully synthesized it by using the palladium-catalyzed cross-coupling reaction of a triiodo-derivative of the 1,2,4-benzotriazinyl radical with gold(I) nitronyl nitroxide-2-ide complex in the presence of a newly developed efficient catalytic system. The molecular and crystal structure of the tetraradical was confirmed by X-ray diffraction analysis. The tetraradical possesses good thermal stability with decomposition onset at ∼150 °C under an inert atmosphere and exhibits reversible redox waves at -0.54 and 0.45 V versus Ag/AgCl. The magnetic properties of the tetraradical were characterized by SQUID magnetometry of polycrystalline powders and EPR spectroscopy in various matrices. The collected data, analyzed by using high-level quantum chemical calculations, confirmed that the tetraradical has a triplet ground state and a nearby excited quintet state. The unique high stability of the prepared triazinyl-nitronylnitroxide tetraradical is a new milestone in the field of creating high-spin systems.
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Affiliation(s)
- Evgeny V Tretyakov
- N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Ave. 47, 119991, Moscow, Russian Federation
| | - Igor A Zayakin
- N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Ave. 47, 119991, Moscow, Russian Federation
| | - Alexey A Dmitriev
- V.V. Voevodsky Institute of Chemical Kinetics and Combustion, Siberian Branch of Russian Academy of Sciences, Institutskaya Str. 3, 630090, Novosibirsk, Russian Federation
| | - Matvey V Fedin
- International Tomography Center, Siberian Branch of Russian Academy of Sciences, Institutskaya Str. 3a, 630090, Novosibirsk, Russian Federation
| | - Galina V Romanenko
- International Tomography Center, Siberian Branch of Russian Academy of Sciences, Institutskaya Str. 3a, 630090, Novosibirsk, Russian Federation
| | - Artem S Bogomyakov
- International Tomography Center, Siberian Branch of Russian Academy of Sciences, Institutskaya Str. 3a, 630090, Novosibirsk, Russian Federation
| | - Anna Ya Akyeva
- N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Ave. 47, 119991, Moscow, Russian Federation
| | - Mikhail A Syroeshkin
- N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Ave. 47, 119991, Moscow, Russian Federation
| | - Naoki Yoshioka
- Department of Applied Chemistry Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, 223-8522 Kanagawa, Japan
| | - Nina P Gritsan
- V.V. Voevodsky Institute of Chemical Kinetics and Combustion, Siberian Branch of Russian Academy of Sciences, Institutskaya Str. 3, 630090, Novosibirsk, Russian Federation
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Kolesnikov AE, Bryzgalov AO, Tolstikov SE, Yanshole VV, Romanenko GV, Letyagin GA, Smirnova KA, Tolstikova TG, Bogomyakov AS, Ovcharenko VI. Novel pyridyl-substituted nitronyl nitroxides as potential antiarrhythmic and hypotensive agents with low toxicity and enhanced stability in aqueous solutions. Nitric Oxide 2024; 143:9-15. [PMID: 38096947 DOI: 10.1016/j.niox.2023.12.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Revised: 12/01/2023] [Accepted: 12/07/2023] [Indexed: 12/21/2023]
Abstract
This study explores the antiarrhythmic and hypotensive potential of pyridyl-substituted nitronyl nitroxides derivatives, uncovering the crucial role of a single carbon moiety of the pyridine cycle alongside radical and charged oxygen centers of the imidazoline fragment. Notably, the introduction of fluorine atoms diminished the antiarrhythmic effect, while the most potent derivatives featured the nitronyl nitroxide pattern positioned at the third site of the pyridine cycle. Gender-dependent responses were observed in lead compounds LCF3 and LMe, with LMe inducing temporary bradycardia and hypotension specifically in female rats, and LCF3 causing significant blood pressure reduction followed by rebound in females compared to milder effects in males. Mechanistic insights point towards β1 adrenoceptor blockade as an underlying mechanism, supported by experiments on isolated rat atria. This research underscores the interplay between structure, cardiovascular effects and gender-specific responses, offering insights for therapeutic strategies for treating free radical-associated cardiovascular disorders.
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Affiliation(s)
- Andrey E Kolesnikov
- N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky prospect 47, Moscow, 119991, Russia.
| | - Arkadiy O Bryzgalov
- N.N. Vorozhtsov Novosibirsk Institute of Organic Chemistry, Russian Academy of Sciences, Siberian Branch, Akademika Lavrentieva prospect 9, Novosibirsk, 630090, Russia.
| | - Svyatoslav E Tolstikov
- N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky prospect 47, Moscow, 119991, Russia; International Tomography Center, Russian Academy of Sciences, Siberian Branch, Institutskaya ulitsa 3a, Novosibirsk, 630090, Russia
| | - Vadim V Yanshole
- International Tomography Center, Russian Academy of Sciences, Siberian Branch, Institutskaya ulitsa 3a, Novosibirsk, 630090, Russia
| | - Galina V Romanenko
- International Tomography Center, Russian Academy of Sciences, Siberian Branch, Institutskaya ulitsa 3a, Novosibirsk, 630090, Russia
| | - Gleb A Letyagin
- International Tomography Center, Russian Academy of Sciences, Siberian Branch, Institutskaya ulitsa 3a, Novosibirsk, 630090, Russia
| | - Kristina A Smirnova
- International Tomography Center, Russian Academy of Sciences, Siberian Branch, Institutskaya ulitsa 3a, Novosibirsk, 630090, Russia
| | - Tatiana G Tolstikova
- N.N. Vorozhtsov Novosibirsk Institute of Organic Chemistry, Russian Academy of Sciences, Siberian Branch, Akademika Lavrentieva prospect 9, Novosibirsk, 630090, Russia
| | - Artem S Bogomyakov
- N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky prospect 47, Moscow, 119991, Russia; International Tomography Center, Russian Academy of Sciences, Siberian Branch, Institutskaya ulitsa 3a, Novosibirsk, 630090, Russia
| | - Victor I Ovcharenko
- N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky prospect 47, Moscow, 119991, Russia; International Tomography Center, Russian Academy of Sciences, Siberian Branch, Institutskaya ulitsa 3a, Novosibirsk, 630090, Russia
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Golomolzina IV, Tolstikov SE, Smirnova KA, Fokin SV, Letyagin GA, Romanenko GV, Bogomyakov AS. N-Alkylimidazol-5-yl-substituted Nitronyl Nitroxides and Their Mononuclear Cu(II) Complexes: Synthesis, Structure and Magnetic Properties. Chemistry 2023:e202303499. [PMID: 38116871 DOI: 10.1002/chem.202303499] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2023] [Revised: 12/14/2023] [Accepted: 12/18/2023] [Indexed: 12/21/2023]
Abstract
A novel synthetic approach has been employed to synthesize a series of new nitronyl nitroxides: 2-(1-propyl-1H-imidazol-5-yl)- (Ln-Pr ), 2-(1-isopropyl-1H-imidazol-5-yl)- (Li-Pr ) and 2-(1-butyl-1H-imidazol-5-yl)-4,4,5,5-tetramethyl-4,5-dihydro-1H-imidazole-3-oxide-1-oxyl (Ln-Bu ). The reaction of Cu(hfac)2 with LR in a 1 : 2 ratio yields mononuclear heterospin complexes [Cu(hfac)2 (LR )2 ] (LR =Ln-Pr , Li-Pr , Ln-Bu ), which have a similar crystal structure to the "jumping" crystals [Cu(hfac)2 (LMe )2 ] that exhibit chemomechanical activity. It was shown that an increase in the alkyl substituent R leads to changes in the crystal packing of the molecules and the absence of chemomechanical activity. Furthermore, it was found that two polymorph modifications of the heterospin complex [Cu(hfac)2 (Ln-Pr )2 ] can be obtained, and magnetic properties of [Cu(hfac)2 (Ln-Pr )2 ] strongly depend on the angle between the planes of the paramagnetic fragment O•-N-C=N→O and the imidazole ring in Ln-Pr .
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Affiliation(s)
- Irina V Golomolzina
- International Tomography Center, Siberian Branch of the Russian Academy of Sciences, Institutskaya Str. 3a, 630090, Novosibirsk, Russian Federation
| | - Svyatoslav E Tolstikov
- International Tomography Center, Siberian Branch of the Russian Academy of Sciences, Institutskaya Str. 3a, 630090, Novosibirsk, Russian Federation
| | - Kristina A Smirnova
- International Tomography Center, Siberian Branch of the Russian Academy of Sciences, Institutskaya Str. 3a, 630090, Novosibirsk, Russian Federation
| | - Sergey V Fokin
- International Tomography Center, Siberian Branch of the Russian Academy of Sciences, Institutskaya Str. 3a, 630090, Novosibirsk, Russian Federation
| | - Gleb A Letyagin
- International Tomography Center, Siberian Branch of the Russian Academy of Sciences, Institutskaya Str. 3a, 630090, Novosibirsk, Russian Federation
| | - Galina V Romanenko
- International Tomography Center, Siberian Branch of the Russian Academy of Sciences, Institutskaya Str. 3a, 630090, Novosibirsk, Russian Federation
| | - Artem S Bogomyakov
- International Tomography Center, Siberian Branch of the Russian Academy of Sciences, Institutskaya Str. 3a, 630090, Novosibirsk, Russian Federation
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5
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Smirnova KA, Edilova YO, Kiskin MA, Bogomyakov AS, Kudyakova YS, Valova MS, Romanenko GV, Slepukhin PA, Saloutin VI, Bazhin DN. Perfluoroalkyl Chain Length Effect on Crystal Packing and [LnO 8] Coordination Geometry in Lanthanide-Lithium β-Diketonates: Luminescence and Single-Ion Magnet Behavior. Int J Mol Sci 2023; 24:ijms24119778. [PMID: 37298728 DOI: 10.3390/ijms24119778] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Revised: 05/31/2023] [Accepted: 06/03/2023] [Indexed: 06/12/2023] Open
Abstract
Functionalized perfluoroalkyl lithium β-diketonates (LiL) react with lanthanide(III) salts (Ln = Eu, Gd, Tb, Dy) in methanol to give heterobimetallic Ln-Li complexes of general formula [(LnL3)(LiL)(MeOH)]. The length of fluoroalkyl substituent in ligand was found to affect the crystal packing of complexes. Photoluminescent and magnetic properties of heterobimetallic β-diketonates in the solid state are reported. The effect of the geometry of the [LnO8] coordination environment of heterometallic β-diketonates on the luminescent properties (quantum yields, phosphorescence lifetimes for Eu, Tb, Dy complexes) and single-ion magnet behavior (Ueff for Dy complexes) is revealed.
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Affiliation(s)
- Kristina A Smirnova
- International Tomography Center, Siberian Branch of the Russian Academy of Sciences, 630090 Novosibirsk, Russia
| | - Yulia O Edilova
- Postovsky Institute of Organic Synthesis, Ural Branch of the Russian Academy of Sciences, 620137 Yekaterinburg, Russia
| | - Mikhail A Kiskin
- N.S. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, 119991 Moscow, Russia
| | - Artem S Bogomyakov
- International Tomography Center, Siberian Branch of the Russian Academy of Sciences, 630090 Novosibirsk, Russia
| | - Yulia S Kudyakova
- Postovsky Institute of Organic Synthesis, Ural Branch of the Russian Academy of Sciences, 620137 Yekaterinburg, Russia
| | - Marina S Valova
- Postovsky Institute of Organic Synthesis, Ural Branch of the Russian Academy of Sciences, 620137 Yekaterinburg, Russia
| | - Galina V Romanenko
- International Tomography Center, Siberian Branch of the Russian Academy of Sciences, 630090 Novosibirsk, Russia
| | - Pavel A Slepukhin
- Postovsky Institute of Organic Synthesis, Ural Branch of the Russian Academy of Sciences, 620137 Yekaterinburg, Russia
| | - Victor I Saloutin
- Postovsky Institute of Organic Synthesis, Ural Branch of the Russian Academy of Sciences, 620137 Yekaterinburg, Russia
| | - Denis N Bazhin
- Postovsky Institute of Organic Synthesis, Ural Branch of the Russian Academy of Sciences, 620137 Yekaterinburg, Russia
- Department of Organic and Biomolecular Chemistry, Ural Federal University Named after the First President of Russia B.N. Eltsin, 620002 Ekaterinburg, Russia
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6
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Tretyakov EV, Lomanovich KA, Bagryanskaya EG, Romanenko GV, Bogomyakov AS, Zueva EM, Petrova MM, Dmitriev AA, Gritsan NP. 2‐(8‐Iodonaphthalen‐1‐yl)‐Substituted Nitronyl Nitroxide: Suppressed Reactivity of Iodine Atom and Unusual Temperature Dynamics of the EPR Spectrum. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100138] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Evgeny V. Tretyakov
- N. D. Zelinsky Institute of Organic Chemistry Russian Academy of Sciences Leninsky Prospect, 47 Moscow 119991 Russia
| | - Konstantin A. Lomanovich
- N. N. Vorozhtsov Institute of Organic Chemistry Siberian Branch of Russian Academy of Sciences 9 Ac. Lavrentiev Avenue Novosibirsk 630090 Russia
| | - Elena G. Bagryanskaya
- N. N. Vorozhtsov Institute of Organic Chemistry Siberian Branch of Russian Academy of Sciences 9 Ac. Lavrentiev Avenue Novosibirsk 630090 Russia
| | - Galina V. Romanenko
- International Tomography Center Siberian Branch of Russian Academy of Sciences 3a Institutskaya Str. Novosibirsk 630090 Russia
| | - Artem S. Bogomyakov
- International Tomography Center Siberian Branch of Russian Academy of Sciences 3a Institutskaya Str. Novosibirsk 630090 Russia
| | - Ekaterina M. Zueva
- Kazan National Research Technological University 68 K. Marx Str. Kazan 420015 Russia
| | - Maria M. Petrova
- Kazan National Research Technological University 68 K. Marx Str. Kazan 420015 Russia
| | - Alexey A. Dmitriev
- V.V. Voevodsky Institute of Chemical Kinetics and Combustion Siberian Branch of Russian Academy of Sciences 3 Institutskaya Str. Novosibirsk 630090 Russia
| | - Nina P. Gritsan
- V.V. Voevodsky Institute of Chemical Kinetics and Combustion Siberian Branch of Russian Academy of Sciences 3 Institutskaya Str. Novosibirsk 630090 Russia
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7
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Rumyantcev R, Fukin GK, Romanenko GV, Teplova IA, Bubnov MP, Cherkasov VK. Single Crystal X-ray Diffraction Studies of Two Polymorphic Modifications of the Dicarbonyl- o-Semiquinonato Rhodium Complex at Different Temperatures. Destruction Stimulated by Cooling Versus Stability. ACS Omega 2020; 5:32792-32799. [PMID: 33376917 PMCID: PMC7758960 DOI: 10.1021/acsomega.0c05344] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Accepted: 11/25/2020] [Indexed: 05/06/2023]
Abstract
It was found that the dicarbonyl-rhodium-o-semiquinonate complex (which thread-like crystals can bend reversibly under light/warm activation) can form two polymorphic modifications: isometric prisms (1) and sticks (2). Some thin sticks can bend as mentioned above. X-ray diffraction studies of polymorphic modifications at different temperatures were carried out. It was found that crystals 1 are destructed after cooling to 110 K as opposed to crystals 2. In turn, the reversible phase transition is detected in 2. In both polymorphic modifications, stack packaging motifs through the direct Rh-Rh bond are observed. The principal difference between packages of polymorphic modifications is that molecules 1 in the adjacent stacks are shifted relative to each other along the stack, in contrast to crystal 2. It was found that different packing of stacks leads to different anisotropic compression of crystals 1 and 2 during cooling, which is a key factor of their stability. Using the molecular invariom approach, the nature of the chemical bonds and charge distribution was investigated; the energy of the Rh-Rh bonds was estimated.
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Affiliation(s)
- Roman
V. Rumyantcev
- G.
A. Razuvaev Institute of Organometallic Chemistry of Russian Academy
of Sciences, 49 Tropinina
str., GSP-445, Nizhniy Novgorod 603950, Russia
| | - Georgy K. Fukin
- G.
A. Razuvaev Institute of Organometallic Chemistry of Russian Academy
of Sciences, 49 Tropinina
str., GSP-445, Nizhniy Novgorod 603950, Russia
| | - Galina V. Romanenko
- International
Tomography Center of Siberian Branch of Russian Academy of Sciences, Institutskaya, 3a, Novosibirsk 630090, Russia
| | - Irina A. Teplova
- G.
A. Razuvaev Institute of Organometallic Chemistry of Russian Academy
of Sciences, 49 Tropinina
str., GSP-445, Nizhniy Novgorod 603950, Russia
| | - Michael P. Bubnov
- G.
A. Razuvaev Institute of Organometallic Chemistry of Russian Academy
of Sciences, 49 Tropinina
str., GSP-445, Nizhniy Novgorod 603950, Russia
| | - Vladimir K. Cherkasov
- G.
A. Razuvaev Institute of Organometallic Chemistry of Russian Academy
of Sciences, 49 Tropinina
str., GSP-445, Nizhniy Novgorod 603950, Russia
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8
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Kadilenko EM, Gritsan NP, Tretyakov EV, Fokin SV, Romanenko GV, Bogomyakov AS, Gorbunov DE, Schollmeyer D, Baumgarten M, Ovcharenko VI. A black-box approach to the construction of metal-radical multispin systems and analysis of their magnetic properties. Dalton Trans 2020; 49:16916-16927. [PMID: 33188374 DOI: 10.1039/d0dt03184d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
An interaction of M(hfac)2 (M = Mn or Ni) with N-(bis(4,4,5,5-tetramethyl-3-oxido-1-oxyl-4,5-dihydro-1H-imidazol-2-yl)methylene)-2-methyl-propan-2-amine oxide (a nitronyl nitroxide diradical with the >C[double bond, length as m-dash]N(O)-tert-Bu coupler) was investigated under various conditions. It was found that prolongation of reaction time caused transformation of the initial diradical into new diradicals with the unique >C[double bond, length as m-dash]N-OH coupling unit and formation of binuclear Mn(ii) and Ni(ii) complexes, which were characterized by X-ray diffraction analysis. The resulting binuclear heterospin complexes have a complicated magnetic structure with six paramagnetic centers and a number of exchange interaction channels between them, as well as between neighboring complexes. To adequately describe the magnetic properties of these complexes, high-level ab initio calculations of their electronic structure and parameters of the spin-Hamiltonian were carried out. The accuracy of the conventional broken-symmetry density functional theory approach in the calculation of the exchange interaction parameters was also verified.
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Affiliation(s)
- E M Kadilenko
- V. V. Voevodsky Institute of Chemical Kinetics and Combustion, 3 Institutskaya Str., Novosibirsk 630090, Russia.
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9
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Fishman NN, Lukzen NN, Ivanov KL, Edeleva MV, Fokin SV, Romanenko GV, Ovcharenko VI. Multifrequency Nuclear Magnetic Resonance as an Efficient Tool To Investigate Heterospin Complexes in Solutions. J Phys Chem A 2020; 124:1343-1352. [PMID: 31986040 DOI: 10.1021/acs.jpca.9b11104] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We report a multifrequency nuclear magnetic resonance (NMR) study of heterospin complexes [Eu(SQ)3Ln], where SQ is 3,6-di(tert-butyl)-1,2-semiquinone, L is tetrahydrofuran (THF), pyridine (Py), or 2,2'-dipyridyl (Dipy), and n is the number of diamagnetic ligands. Multifrequency NMR experiments allowed us to determine the effective paramagnetic shifts of the ligands (L = THF or Py) and the chemical equilibrium constant for [Eu(SQ)3(THF)2]. In addition, we have found a strong magnetic field effect on the NMR line broadening, giving rise to very broad NMR lines at high magnetic fields. We attribute this effect to broadening under fast exchange conditions when the NMR spectrum represents a homogeneously broadened line with a width proportional to the square of the NMR frequency difference of the free and bound forms of L. Consequently, the line width strongly increases with the magnetic field. This broadening effect allows one to determine relevant kinetic parameters, i.e., the effective exchange time. The strong broadening effect allows one to exploit the [Eu(SQ)3(THF)2] complex as an efficient shift reagent, which not only shifts unwanted NMR signals but also broadens them, notably, in high-field NMR experiments. We have also found that [Eu(SQ)3Dipy] is a thermodynamically stable complex; hence, one can study [Eu(SQ)3Dipy] solutions without special precautions. We report an X-ray structure of the [Eu(SQ)3Dipy]·C6D6 crystals that have been grown directly in an NMR tube. This shows that multifrequency NMR investigations of heterospin compound solutions not only provide thermodynamic and kinetic data for heterospin species but also can be useful for the rational design of stable heterospin complexes and optimization of synthetic approaches.
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Affiliation(s)
- Natalya N Fishman
- International Tomography Center , Siberian Branch of the Russian Academy of Sciences , Institutskaya Strasse 3a , Novosibirsk 630090 , Russia.,Novosibirsk State University , Pirogova Strasse 1 , Novosibirsk 630090 , Russia
| | - Nikita N Lukzen
- International Tomography Center , Siberian Branch of the Russian Academy of Sciences , Institutskaya Strasse 3a , Novosibirsk 630090 , Russia.,Novosibirsk State University , Pirogova Strasse 1 , Novosibirsk 630090 , Russia
| | - Konstantin L Ivanov
- International Tomography Center , Siberian Branch of the Russian Academy of Sciences , Institutskaya Strasse 3a , Novosibirsk 630090 , Russia.,Novosibirsk State University , Pirogova Strasse 1 , Novosibirsk 630090 , Russia
| | - Mariya V Edeleva
- Vorozhtsov Novosibirsk Institute of Organic Chemistry , Siberian Branch of the Russian Academy of Sciences , Academician Lavrentyev Avenue 9 , Novosibirsk 630090 , Russia
| | - Sergey V Fokin
- International Tomography Center , Siberian Branch of the Russian Academy of Sciences , Institutskaya Strasse 3a , Novosibirsk 630090 , Russia
| | - Galina V Romanenko
- International Tomography Center , Siberian Branch of the Russian Academy of Sciences , Institutskaya Strasse 3a , Novosibirsk 630090 , Russia
| | - Victor I Ovcharenko
- International Tomography Center , Siberian Branch of the Russian Academy of Sciences , Institutskaya Strasse 3a , Novosibirsk 630090 , Russia
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10
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Ivakhnenko EP, Knyazev PA, Kovalenko AA, Romanenko GV, Revinskii YV, Starikov AG, Minkin VI. Synthesis, structure, redox activity and luminescence of sterically crowded 6,8-di-(tert-butyl)-3H-phenoxazin-3-one. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2019.151429] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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11
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Bubnov MP, Teplova IA, Cherkasova AV, Baranov EV, Fukin GK, Romanenko GV, Bogomyakov AS, Starikov AG, Cherkasov VK, Abakumov GA. Metal-ligand ferromagnetic exchange interactions in heteroligand bis-o-semiquinonato nickel complexes with 2,2′-dipyridine and 1,10-phenanthroline. Polyhedron 2019. [DOI: 10.1016/j.poly.2018.10.071] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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12
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Ivakhnenko EP, Knyazev PA, Romanenko GV, Kovalenko AА, Ivakhnenko TE, Revinskii YV, Minkin VI. The carboxyl derivatives of 6,8-di-(tert.-butyl)phenoxazine: Synthesis, oxidation reactions and fluorescence. Tetrahedron 2019. [DOI: 10.1016/j.tet.2018.12.047] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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13
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Berezin AS, Krisyuk VV, Nadolinny VA, Baidina IA, Romanenko GV, Korotaev EV. Synthesis, structure, and magnetic properties of the tetranuclear complex [Cu(tmhd) 2Pb(hfa) 2] 2. Influence of temperature-dependent rotation of CF 3 groups upon EPR spectra. J COORD CHEM 2017. [DOI: 10.1080/00958972.2017.1393070] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Alexey S. Berezin
- Nikolaev Institute of Inorganic Chemistry Siberian Branch of Russian Academy of Sciences, Novosibirsk, Russian Federation
| | - Vladislav V. Krisyuk
- Nikolaev Institute of Inorganic Chemistry Siberian Branch of Russian Academy of Sciences, Novosibirsk, Russian Federation
| | - Vladimir A. Nadolinny
- Nikolaev Institute of Inorganic Chemistry Siberian Branch of Russian Academy of Sciences, Novosibirsk, Russian Federation
| | - Iraida A. Baidina
- Nikolaev Institute of Inorganic Chemistry Siberian Branch of Russian Academy of Sciences, Novosibirsk, Russian Federation
| | - Galina V. Romanenko
- International Tomography Center Siberian Branch of Russian Academy of Sciences, Novosibirsk, Russian Federation
| | - Evgeniy V. Korotaev
- Nikolaev Institute of Inorganic Chemistry Siberian Branch of Russian Academy of Sciences, Novosibirsk, Russian Federation
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14
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Tumanov SV, Veber SL, Tolstikov SE, Artiukhova NA, Romanenko GV, Ovcharenko VI, Fedin MV. Light-Induced Spin State Switching and Relaxation in Spin Pairs of Copper(II)–Nitroxide Based Molecular Magnets. Inorg Chem 2017; 56:11729-11737. [DOI: 10.1021/acs.inorgchem.7b01689] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sergey V. Tumanov
- International Tomography Center SB RAS, Institutskaya
Str. 3a, 630090 Novosibirsk, Russia
- Novosibirsk State University, Pirogova
Str. 2, 630090 Novosibirsk, Russia
| | - Sergey L. Veber
- International Tomography Center SB RAS, Institutskaya
Str. 3a, 630090 Novosibirsk, Russia
- Novosibirsk State University, Pirogova
Str. 2, 630090 Novosibirsk, Russia
| | | | - Natalia A. Artiukhova
- International Tomography Center SB RAS, Institutskaya
Str. 3a, 630090 Novosibirsk, Russia
| | - Galina V. Romanenko
- International Tomography Center SB RAS, Institutskaya
Str. 3a, 630090 Novosibirsk, Russia
| | - Victor I. Ovcharenko
- International Tomography Center SB RAS, Institutskaya
Str. 3a, 630090 Novosibirsk, Russia
| | - Matvey V. Fedin
- International Tomography Center SB RAS, Institutskaya
Str. 3a, 630090 Novosibirsk, Russia
- Novosibirsk State University, Pirogova
Str. 2, 630090 Novosibirsk, Russia
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15
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Ivakhnenko EP, Romanenko GV, Simakov VI, Knyazev PA, Bogomyakov AS, Lyssenko KA, Minkin VI. Synthesis and structure of nonacoordinated tris-chelate lanthanide (III) complexes with tridentate 2,4,6,8-tetrakis(tert-butyl)-9-hydroxyphenoxazin-1-one ligands. Inorganica Chim Acta 2017. [DOI: 10.1016/j.ica.2017.01.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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16
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Tolstikov SE, Tretyakov EV, Gorbunov DE, Zhurko IF, Fedin MV, Romanenko GV, Bogomyakov AS, Gritsan NP, Mazhukin DG. Reaction of Paramagnetic Synthon, Lithiated 4,4,5,5-Tetramethyl-4,5-dihydro-1H-imidazol-1-oxyl 3-oxide, with Cyclic Aldonitrones of the Imidazole Series. Chemistry 2016; 22:14598-604. [PMID: 27539325 DOI: 10.1002/chem.201602049] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2016] [Indexed: 11/07/2022]
Affiliation(s)
| | - Evgeny V. Tretyakov
- N. N. Vorozhtsov Institute of Organic Chemistry; 9 Ac. Lavrentiev Avenue Novosibirsk 630090 Russia
- Novosibirsk State University; 2 Pirogova Str. Novosibirsk 630090 Russia
| | - Dmitry E. Gorbunov
- Novosibirsk State University; 2 Pirogova Str. Novosibirsk 630090 Russia
- V. V. Voevodsky Institute of Chemical Kinetics and Combustion; 3 Institutskaya Str. Novosibirsk 630090 Russia
| | - Irina F. Zhurko
- N. N. Vorozhtsov Institute of Organic Chemistry; 9 Ac. Lavrentiev Avenue Novosibirsk 630090 Russia
- Novosibirsk State University; 2 Pirogova Str. Novosibirsk 630090 Russia
| | - Matvey V. Fedin
- International Tomography Center; 3a Institutskaya Str. Novosibirsk 630090 Russia
- Novosibirsk State University; 2 Pirogova Str. Novosibirsk 630090 Russia
| | - Galina V. Romanenko
- International Tomography Center; 3a Institutskaya Str. Novosibirsk 630090 Russia
| | - Artem S. Bogomyakov
- International Tomography Center; 3a Institutskaya Str. Novosibirsk 630090 Russia
| | - Nina P. Gritsan
- Novosibirsk State University; 2 Pirogova Str. Novosibirsk 630090 Russia
- V. V. Voevodsky Institute of Chemical Kinetics and Combustion; 3 Institutskaya Str. Novosibirsk 630090 Russia
| | - Dmitry G. Mazhukin
- N. N. Vorozhtsov Institute of Organic Chemistry; 9 Ac. Lavrentiev Avenue Novosibirsk 630090 Russia
- Novosibirsk State University; 2 Pirogova Str. Novosibirsk 630090 Russia
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17
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Ivakhnenko EP, Simakov VI, Knyazev PA, Romanenko GV, Bogomyakov AS, Minkin VI. Synthesis and structure of a tris-chelate GdIII complex with tridentate 2,4,6,8-tetrakis(tert-butyl)-9-hydroxyphenoxazinone ligands. Mendeleev Communications 2016. [DOI: 10.1016/j.mencom.2016.01.019] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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18
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Vologzhanina AV, Belov AS, Novikov VV, Dolganov AV, Romanenko GV, Ovcharenko VI, Korlyukov AA, Buzin MI, Voloshin YZ. Synthesis and Temperature-Induced Structural Phase and Spin Transitions in Hexadecylboron-Capped Cobalt(II) Hexachloroclathrochelate and Its Diamagnetic Iron(II)-Encapsulating Analogue. Inorg Chem 2015; 54:5827-38. [DOI: 10.1021/acs.inorgchem.5b00546] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Anna V. Vologzhanina
- Nesmeyanov
Institute of Organoelement Compounds, Russian Academy of Sciences, 119991 Moscow, Russia
| | - Alexander S. Belov
- Nesmeyanov
Institute of Organoelement Compounds, Russian Academy of Sciences, 119991 Moscow, Russia
| | - Valentin V. Novikov
- Nesmeyanov
Institute of Organoelement Compounds, Russian Academy of Sciences, 119991 Moscow, Russia
| | - Alexander V. Dolganov
- Nesmeyanov
Institute of Organoelement Compounds, Russian Academy of Sciences, 119991 Moscow, Russia
| | - Galina V. Romanenko
- International Tomography
Center, Siberian Branch of the Russian Academy of Sciences, 630090 Novosibirsk, Russia
| | - Victor I. Ovcharenko
- International Tomography
Center, Siberian Branch of the Russian Academy of Sciences, 630090 Novosibirsk, Russia
| | - Alexander A. Korlyukov
- Nesmeyanov
Institute of Organoelement Compounds, Russian Academy of Sciences, 119991 Moscow, Russia
- Pirogov Russian National Research Medical University, 117997 Moscow, Russia
| | - Mikhail I. Buzin
- Nesmeyanov
Institute of Organoelement Compounds, Russian Academy of Sciences, 119991 Moscow, Russia
| | - Yan Z. Voloshin
- Nesmeyanov
Institute of Organoelement Compounds, Russian Academy of Sciences, 119991 Moscow, Russia
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19
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Dolganov AV, Belov AS, Novikov VV, Vologzhanina AV, Romanenko GV, Budnikova YG, Zelinskii GE, Buzin MI, Voloshin YZ. First iron and cobalt(II) hexabromoclathrochelates: structural, magnetic, redox, and electrocatalytic behavior. Dalton Trans 2015; 44:2476-87. [PMID: 25559125 DOI: 10.1039/c4dt03082f] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Template condensation of dibromoglyoxime with n-butylboronic acid on the corresponding metal ion as a matrix under vigorous reaction conditions afforded iron and cobalt(ii) hexabromoclathrochelates. The paramagnetic cobalt clathrochelate was found to be a low-spin complex at temperatures below 100 K, with a gradual increase in the effective magnetic moment at higher temperatures due to the temperature 1/2↔3/2 spin crossover and a gap caused by the structure phase transition. The multitemperature X-ray and DSC studies of this complex and its iron(ii)-containing analog also showed temperature structural transitions. The variation of an encapsulated metal ion's radius, electronic structure and spin state caused substantial differences in the geometry of its coordination polyhedron; these differences increase with the decrease in temperature due to Jahn-Teller distortion of the encapsulated cobalt(ii) ion with an electronic configuration d(7). As follows from CV and GC data, these cage iron and cobalt complexes undergo both oxidation and reduction quasireversibly, and showed an electrocatalytic activity for hydrogen production in different producing systems.
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Affiliation(s)
- Alexander V Dolganov
- Nesmeyanov Institute of Organoelement Compounds of the Russian Academy of Sciences, 119991 Moscow, Russia.
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20
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Fedin MV, Veber SL, Bagryanskaya EG, Romanenko GV, Ovcharenko VI. Spatial distribution of phases during gradual magnetostructural transitions in copper(ii)–nitroxide based molecular magnets. Dalton Trans 2015; 44:18823-30. [DOI: 10.1039/c5dt03441h] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A thorough analysis of EPR and XRD data led to conclusions on the spatial distribution of phases in copper–nitroxide molecular magnets.
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Affiliation(s)
- Matvey V. Fedin
- International Tomography Center SB RAS
- Novosibirsk
- Russia
- Novosibirsk State University
- Novosibirsk
| | - Sergey L. Veber
- International Tomography Center SB RAS
- Novosibirsk
- Russia
- Novosibirsk State University
- Novosibirsk
| | - Elena G. Bagryanskaya
- Novosibirsk State University
- Novosibirsk
- Russia
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry SB RAS
- Novosibirsk
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21
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Tretyakov EV, Romanenko GV, Veber SL, Fedin MV, Polushkin AV, Tkacheva AO, Ovcharenko VI. Cu(hfac)2 Complexes with Nitronyl Ketones Structurally Mimicking Nitronyl Nitroxides in Breathing Crystals. Aust J Chem 2015. [DOI: 10.1071/ch14422] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Breathing crystals based on polymer-chain complexes of Cu(hfac)2 (hfac = hexafluoroacetylacetonate) with nitronyl nitroxides represent a new type of molecular magnetic sensors, exhibiting thermally and light-induced structural rearrangements in the spin clusters Cu ← (O∸N<)n accompanied by magnetic anomalies. To shed light on the driving forces of the rearrangements a method for the synthesis of sterically hindered 4-oxo-3,4-dihydro-2H-pyrrole-N-oxides (nitronyl ketones) structurally mimicking nitronyl nitroxides in breathing crystals has been determined. This method employs palladium-catalyzed cross-coupling of 3,3,4-trimethyl-4-nitropentanoic acid chloride with 4-stannylpyrazoles, leading to the formation of nitroketones followed by soft reduction into hydroxylamines, that then undergo self-initiated cyclization into the corresponding nitrones. The radical oxidation of the latter finally yields the target nitronyl ketones. An X-ray diffraction analysis of the nitronyl ketones confirms that their structural characteristics are close to those of the corresponding nitronyl nitroxides. Moreover, upon reaction with Cu(hfac)2, diamagnetic nitronyl ketones form polymer-chain complexes with a ‘head-to-tail’ motif and a structure similar to their analogues containing paramagnetic nitronyl nitroxides. Finally, it has been found that one of the complexes with nitronyl ketones does manifest a purely structural phase transition similar to its copper-nitroxide analogue, but at the same time it does not manifest any signs of a magneto-structural transition characteristic for breathing crystals where a Jahn–Teller axis in the coordination units CuNO4(O∸N<) is flipped. This observation strongly confirms the crucial role of the exchange interactions between spins of copper and nitroxide for the origin of magneto-structural anomalies in breathing crystals.
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22
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Rozentsveig IB, Serykh VY, Chernysheva GN, Kondrashov EV, Fedotova AI, Ushakov IA, Tretyakov EV, Romanenko GV. Two-Step Regioselective Synthesis of 3-(Sulfonylamino)imidazo[1,2- a]pyrimidines from 2-Aminopyrimidines and N-(2,2-Dichloro-2-phenylethylidene)arensulfonamides. European J Org Chem 2014. [DOI: 10.1002/ejoc.201402695] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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23
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Romanenko GV, Ivakhnenko EP, Minkin VI, Starikov AG, Bogomyakov AS, Veber SL. Sn(IV) complexes with bi- and tridentate phenoxazin-1-one ligands: Synthesis, structure and magnetic properties. Inorganica Chim Acta 2014. [DOI: 10.1016/j.ica.2014.04.001] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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24
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Chalkov NO, Cherkasov VK, Abakumov GA, Romanenko GV, Ketkov SY, Smolyaninov IV, Starikov AG, Kuropatov VA. Compactly Fusedo-Quinone-Extended Tetrathiafulvalene-o-Quinone Triad - a Redox-Amphoteric Ligand. European J Org Chem 2014. [DOI: 10.1002/ejoc.201402367] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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25
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Furui T, Suzuki S, Kozaki M, Shiomi D, Sato K, Takui T, Okada K, Tretyakov EV, Tolstikov SE, Romanenko GV, Ovcharenko VI. Preparation and Magnetic Properties of Metal-Complexes from N-t-Butyl-N-oxidanyl-2-amino-(nitronyl nitroxide). Inorg Chem 2013; 53:802-9. [PMID: 24364815 DOI: 10.1021/ic4020898] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Takanori Furui
- Department of Chemistry, Graduate
School of Science, Osaka City University, Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan
| | - Shuichi Suzuki
- Department of Chemistry, Graduate
School of Science, Osaka City University, Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan
| | - Masatoshi Kozaki
- Department of Chemistry, Graduate
School of Science, Osaka City University, Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan
| | - Daisuke Shiomi
- Department of Chemistry, Graduate
School of Science, Osaka City University, Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan
| | - Kazunobu Sato
- Department of Chemistry, Graduate
School of Science, Osaka City University, Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan
| | - Takeji Takui
- Department of Chemistry, Graduate
School of Science, Osaka City University, Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan
| | - Keiji Okada
- Department of Chemistry, Graduate
School of Science, Osaka City University, Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan
| | - Evgeny V. Tretyakov
- International Tomography
Center, Siberian Branch of the Russian Academy of Sciences, 3a ul. Institutskaya, 630090 Novosibirsk, Russian Federation
| | - Svyatoslav E. Tolstikov
- International Tomography
Center, Siberian Branch of the Russian Academy of Sciences, 3a ul. Institutskaya, 630090 Novosibirsk, Russian Federation
| | - Galina V. Romanenko
- International Tomography
Center, Siberian Branch of the Russian Academy of Sciences, 3a ul. Institutskaya, 630090 Novosibirsk, Russian Federation
| | - Victor I. Ovcharenko
- International Tomography
Center, Siberian Branch of the Russian Academy of Sciences, 3a ul. Institutskaya, 630090 Novosibirsk, Russian Federation
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26
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Fedin MV, Zhilina EF, Chizhov DL, Apolonskaya IA, Aleksandrov GG, Kiskin MA, Sidorov AA, Bogomyakov AS, Romanenko GV, Eremenko IL, Novotortsev VM, Charushin VN. Temperature-dependent zero-field splitting in a copper(ii) dimer studied by EPR. Dalton Trans 2013; 42:4513-21. [DOI: 10.1039/c2dt32697c] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- Matvey V Fedin
- International Tomography Center SB RAS, 630090 Novosibirsk, Russia.
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27
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Rozentsveig IB, Serykh VY, Chernysheva GN, Chernyshev KA, Kondrashov EV, Tretyakov EV, Romanenko GV. One-Pot Synthesis ofN-(Imidazo[1,2-a]pyridin-3-yl)- andN-(Imidazo[2,1-b][1,3]thiazol-5-yl)sulfonamides. European J Org Chem 2012. [DOI: 10.1002/ejoc.201201006] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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28
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Ovcharenko VI, Fokin SV, Kostina ET, Romanenko GV, Bogomyakov AS, Tretyakov EV. First Example of a Reversible Single-Crystal-to-Single-Crystal Polymerization–Depolymerization Accompanied by a Magnetic Anomaly for a Transition-Metal Complex with an Organic Radical. Inorg Chem 2012; 51:12188-94. [DOI: 10.1021/ic301328x] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Victor I. Ovcharenko
- International
Tomography Center, Russian Academy of
Sciences, 3A Institutskaya Str., 630090 Novosibirsk, Russian Federation
| | - Sergey V. Fokin
- International
Tomography Center, Russian Academy of
Sciences, 3A Institutskaya Str., 630090 Novosibirsk, Russian Federation
| | - Elvina T. Kostina
- International
Tomography Center, Russian Academy of
Sciences, 3A Institutskaya Str., 630090 Novosibirsk, Russian Federation
| | - Galina V. Romanenko
- International
Tomography Center, Russian Academy of
Sciences, 3A Institutskaya Str., 630090 Novosibirsk, Russian Federation
| | - Artem S. Bogomyakov
- International
Tomography Center, Russian Academy of
Sciences, 3A Institutskaya Str., 630090 Novosibirsk, Russian Federation
| | - Eugene V. Tretyakov
- International
Tomography Center, Russian Academy of
Sciences, 3A Institutskaya Str., 630090 Novosibirsk, Russian Federation
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29
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Tretyakov EV, Tolstikov SE, Suvorova AO, Polushkin AV, Romanenko GV, Bogomyakov AS, Veber SL, Fedin MV, Stass DV, Reijerse E, Lubitz W, Zueva EM, Ovcharenko VI. Crucial Role of Paramagnetic Ligands for Magnetostructural Anomalies in “Breathing Crystals”. Inorg Chem 2012; 51:9385-94. [DOI: 10.1021/ic301149e] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
| | | | | | | | | | | | | | | | | | - Edward Reijerse
- Max-Planck-Institut für chemische Energiekonversion, 45470 Mülheim/Ruhr,
Germany
| | - Wolfgang Lubitz
- Max-Planck-Institut für chemische Energiekonversion, 45470 Mülheim/Ruhr,
Germany
| | - Ekaterina M. Zueva
- Department of Inorganic
Chemistry, Kazan State Technological University, 68 K. Marx Street,
420015 Kazan, Russian Federation
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30
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Tretyakov EV, Tolstikov SE, Romanenko GV, Bogomyakov AS, Stass DV, Kadirov MK, Holin KV, Sinyashin OG, Ovcharenko VI. Synthesis, structure, and magnetic properties of 2,2′-(buta-1,3-diyne-1,4-diyl)bis(4,4,5,5-tetramethyl-4,5-dihydro-1H-imidazole 3-oxide 1-oxyl). Polyhedron 2011. [DOI: 10.1016/j.poly.2011.04.032] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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31
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Rozentsveig IB, Rozentsveig GN, Levkovskaya GG, Amosova SV, Potapov VA, Chernyshev KA, Tretyakov EV, Romanenko GV. Unexpected reaction of N,N-dichloroarenesulfonamides with divinyl sulfide: formation of N-[2-chloro- and N-[2,2-dichloro-1-(arylsulfonylamino)ethyl]arenesulfonamides. ARKIVOC 2011. [DOI: 10.3998/ark.5550190.0012.a15] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Romanenko GV, Maryunina KY, Bogomyakov AS, Sagdeev RZ, Ovcharenko VI. Relationship between the Thermally Induced Reorientations of Aromatic Solvate Molecules in Cu(hfac)2–Nitroxide Breathing Crystals and the Character of the Magnetic Anomaly. Inorg Chem 2011; 50:6597-609. [DOI: 10.1021/ic200444e] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Galina V. Romanenko
- International Tomography Center, Siberian Branch of the Russian Academy of Sciences, 3A Institutskaya Street, 630090 Novosibirsk, Russia
| | - Ksenia Yu. Maryunina
- International Tomography Center, Siberian Branch of the Russian Academy of Sciences, 3A Institutskaya Street, 630090 Novosibirsk, Russia
| | - Artem S. Bogomyakov
- International Tomography Center, Siberian Branch of the Russian Academy of Sciences, 3A Institutskaya Street, 630090 Novosibirsk, Russia
| | - Renad Z. Sagdeev
- International Tomography Center, Siberian Branch of the Russian Academy of Sciences, 3A Institutskaya Street, 630090 Novosibirsk, Russia
| | - Victor I. Ovcharenko
- International Tomography Center, Siberian Branch of the Russian Academy of Sciences, 3A Institutskaya Street, 630090 Novosibirsk, Russia
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Ovcharenko VI, Fokin SV, Fursova EY, Kuznetsova OV, Tretyakov EV, Romanenko GV, Bogomyakov AS. “Jumping Crystals”: Oxygen-Evolving Metal-Nitroxide Complexes. Inorg Chem 2011; 50:4307-12. [DOI: 10.1021/ic1022483] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Victor I. Ovcharenko
- International Tomography Center, Russian Academy of Sciences, 3A Institutskaya Street, 630090 Novosibirsk, Russian Federation
| | - Sergei V. Fokin
- International Tomography Center, Russian Academy of Sciences, 3A Institutskaya Street, 630090 Novosibirsk, Russian Federation
| | - Elena Yu. Fursova
- International Tomography Center, Russian Academy of Sciences, 3A Institutskaya Street, 630090 Novosibirsk, Russian Federation
| | - Olga V. Kuznetsova
- International Tomography Center, Russian Academy of Sciences, 3A Institutskaya Street, 630090 Novosibirsk, Russian Federation
| | - Eugene V. Tretyakov
- International Tomography Center, Russian Academy of Sciences, 3A Institutskaya Street, 630090 Novosibirsk, Russian Federation
| | - Galina V. Romanenko
- International Tomography Center, Russian Academy of Sciences, 3A Institutskaya Street, 630090 Novosibirsk, Russian Federation
| | - Artem S. Bogomyakov
- International Tomography Center, Russian Academy of Sciences, 3A Institutskaya Street, 630090 Novosibirsk, Russian Federation
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Tretyakov EV, Utepova IA, Varaksin MV, Tolstikov SE, Romanenko GV, Bogomyakov AS, Stass DV, Ovcharenko VI, Chupakhin ON. New approach to synthesis of nitronyl and imino nitroxides based on SNH methodology. ARKIVOC 2011. [DOI: 10.3998/ark.5550190.0012.806] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Voloshin YZ, Varzatskii OA, Novikov VV, Strizhakova NG, Vorontsov II, Vologzhanina AV, Lyssenko KA, Romanenko GV, Fedin MV, Ovcharenko VI, Bubnov YN. Tris-Dioximate Cobalt(I,II,III) Clathrochelates: Stabilization of Different Oxidation and Spin States of an Encapsulated Metal Ion by Ribbed Functionalization. Eur J Inorg Chem 2010. [DOI: 10.1002/ejic.201000444] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Fedin MV, Veber SL, Maryunina KY, Romanenko GV, Suturina EA, Gritsan NP, Sagdeev RZ, Ovcharenko VI, Bagryanskaya EG. Intercluster Exchange Pathways in Polymer-Chain Molecular Magnets Cu(hfac)2LR Unveiled by Electron Paramagnetic Resonance. J Am Chem Soc 2010; 132:13886-91. [DOI: 10.1021/ja105862w] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Matvey V. Fedin
- International Tomography Center SB RAS, Institutskaya str. 3a, and Institute of Chemical Kinetics and Combustion SB RAS, Institutskaya str. 3, 630090 Novosibirsk, Russia
| | - Sergey L. Veber
- International Tomography Center SB RAS, Institutskaya str. 3a, and Institute of Chemical Kinetics and Combustion SB RAS, Institutskaya str. 3, 630090 Novosibirsk, Russia
| | - Ksenia Yu. Maryunina
- International Tomography Center SB RAS, Institutskaya str. 3a, and Institute of Chemical Kinetics and Combustion SB RAS, Institutskaya str. 3, 630090 Novosibirsk, Russia
| | - Galina V. Romanenko
- International Tomography Center SB RAS, Institutskaya str. 3a, and Institute of Chemical Kinetics and Combustion SB RAS, Institutskaya str. 3, 630090 Novosibirsk, Russia
| | - Elizaveta A. Suturina
- International Tomography Center SB RAS, Institutskaya str. 3a, and Institute of Chemical Kinetics and Combustion SB RAS, Institutskaya str. 3, 630090 Novosibirsk, Russia
| | - Nina P. Gritsan
- International Tomography Center SB RAS, Institutskaya str. 3a, and Institute of Chemical Kinetics and Combustion SB RAS, Institutskaya str. 3, 630090 Novosibirsk, Russia
| | - Renad Z. Sagdeev
- International Tomography Center SB RAS, Institutskaya str. 3a, and Institute of Chemical Kinetics and Combustion SB RAS, Institutskaya str. 3, 630090 Novosibirsk, Russia
| | - Victor I. Ovcharenko
- International Tomography Center SB RAS, Institutskaya str. 3a, and Institute of Chemical Kinetics and Combustion SB RAS, Institutskaya str. 3, 630090 Novosibirsk, Russia
| | - Elena G. Bagryanskaya
- International Tomography Center SB RAS, Institutskaya str. 3a, and Institute of Chemical Kinetics and Combustion SB RAS, Institutskaya str. 3, 630090 Novosibirsk, Russia
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Muzalevskiy VM, Nenajdenko VG, Rulev AY, Ushakov IA, Romanenko GV, Shastin AV, Balenkova ES, Haufe G. Selective synthesis of α-trifluoromethyl-β-aryl enamines or vinylogous guanidinium salts by treatment of β-halo-β-trifluoromethylstyrenes with secondary amines under different conditions. Tetrahedron 2009. [DOI: 10.1016/j.tet.2009.06.048] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Chupakhin ON, Utepova IA, Varaksin MV, Tretyakov EV, Romanenko GV, Stass DV, Ovcharenko VI. SNH Approach in the Synthesis of Nitronyl Nitroxides. J Org Chem 2009; 74:2870-2. [DOI: 10.1021/jo900085s] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Oleg N. Chupakhin
- Urals State Technical University, Mira street, 19, 620002 Ekaterinburg, Russian Federation, Postovsky Institute of Organic Synthesis, Urals Branch of the Russian Academy of Sciences, S. Kovalevskoy street, 20, 620041 Ekaterinburg, Russian Federation, International Tomography Center, Siberian Branch of the Russian Academy of Sciences, Institutskaya street, 3a, 630090 Novosibirsk, Russian Federation, and Institute of Chemical Kinetics and Combustion, Siberian Branch of the Russian Academy of Sciences,
| | - Irina A. Utepova
- Urals State Technical University, Mira street, 19, 620002 Ekaterinburg, Russian Federation, Postovsky Institute of Organic Synthesis, Urals Branch of the Russian Academy of Sciences, S. Kovalevskoy street, 20, 620041 Ekaterinburg, Russian Federation, International Tomography Center, Siberian Branch of the Russian Academy of Sciences, Institutskaya street, 3a, 630090 Novosibirsk, Russian Federation, and Institute of Chemical Kinetics and Combustion, Siberian Branch of the Russian Academy of Sciences,
| | - Mikhail V. Varaksin
- Urals State Technical University, Mira street, 19, 620002 Ekaterinburg, Russian Federation, Postovsky Institute of Organic Synthesis, Urals Branch of the Russian Academy of Sciences, S. Kovalevskoy street, 20, 620041 Ekaterinburg, Russian Federation, International Tomography Center, Siberian Branch of the Russian Academy of Sciences, Institutskaya street, 3a, 630090 Novosibirsk, Russian Federation, and Institute of Chemical Kinetics and Combustion, Siberian Branch of the Russian Academy of Sciences,
| | - Evgeny V. Tretyakov
- Urals State Technical University, Mira street, 19, 620002 Ekaterinburg, Russian Federation, Postovsky Institute of Organic Synthesis, Urals Branch of the Russian Academy of Sciences, S. Kovalevskoy street, 20, 620041 Ekaterinburg, Russian Federation, International Tomography Center, Siberian Branch of the Russian Academy of Sciences, Institutskaya street, 3a, 630090 Novosibirsk, Russian Federation, and Institute of Chemical Kinetics and Combustion, Siberian Branch of the Russian Academy of Sciences,
| | - Galina V. Romanenko
- Urals State Technical University, Mira street, 19, 620002 Ekaterinburg, Russian Federation, Postovsky Institute of Organic Synthesis, Urals Branch of the Russian Academy of Sciences, S. Kovalevskoy street, 20, 620041 Ekaterinburg, Russian Federation, International Tomography Center, Siberian Branch of the Russian Academy of Sciences, Institutskaya street, 3a, 630090 Novosibirsk, Russian Federation, and Institute of Chemical Kinetics and Combustion, Siberian Branch of the Russian Academy of Sciences,
| | - Dmitry V. Stass
- Urals State Technical University, Mira street, 19, 620002 Ekaterinburg, Russian Federation, Postovsky Institute of Organic Synthesis, Urals Branch of the Russian Academy of Sciences, S. Kovalevskoy street, 20, 620041 Ekaterinburg, Russian Federation, International Tomography Center, Siberian Branch of the Russian Academy of Sciences, Institutskaya street, 3a, 630090 Novosibirsk, Russian Federation, and Institute of Chemical Kinetics and Combustion, Siberian Branch of the Russian Academy of Sciences,
| | - Victor I. Ovcharenko
- Urals State Technical University, Mira street, 19, 620002 Ekaterinburg, Russian Federation, Postovsky Institute of Organic Synthesis, Urals Branch of the Russian Academy of Sciences, S. Kovalevskoy street, 20, 620041 Ekaterinburg, Russian Federation, International Tomography Center, Siberian Branch of the Russian Academy of Sciences, Institutskaya street, 3a, 630090 Novosibirsk, Russian Federation, and Institute of Chemical Kinetics and Combustion, Siberian Branch of the Russian Academy of Sciences,
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Piskunov AV, Mescheryakova IN, Fukin GK, Bogomyakov AS, Romanenko GV, Cherkasov VK, Abakumov GA. New tin(IV) complexes with sterically hinderedo-iminobenzoquinone ligand: Synthesis and structure. Heteroatom Chem 2009. [DOI: 10.1002/hc.20555] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Fedin MV, Veber SL, Romanenko GV, Ovcharenko VI, Sagdeev RZ, Klihm G, Reijerse E, Lubitz W, Bagryanskaya EG. Dynamic mixing processes in spin triads of “breathing crystals” Cu(hfac)2LR: a multifrequency EPR study at 34, 122 and 244 GHz. Phys Chem Chem Phys 2009; 11:6654-63. [DOI: 10.1039/b906007c] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Becker CS, Roshchupkina GI, Rybalova TV, Gatilov YV, Romanenko GV, Reznikov VA. Unexpected formation of polycyclic oxygen-containing spiro-heterocycles in the reactions of 2,4-dihydro-3H-pyrrol-3-one 1-oxides with benzaldehyde. Mendeleev Communications 2008. [DOI: 10.1016/j.mencom.2008.11.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Veber SL, Fedin MV, Maryunina KY, Romanenko GV, Sagdeev RZ, Bagryanskaya EG, Ovcharenko VI. Diamagnetic dilution due to the phase spin transition – An opportunity for the EPR study of intercluster exchange in “breathing” crystals of copper(II) hexafluoroacetylacetonate with pyrazole-substituted nitronyl nitroxide. Inorganica Chim Acta 2008. [DOI: 10.1016/j.ica.2008.03.126] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Ovcharenko VI, Romanenko GV, Maryunina KY, Bogomyakov AS, Gorelik EV. Thermally induced magnetic anomalies in solvates of the bis(hexafluoroacetylacetonate)copper(II) complex with pyrazolyl-substituted nitronyl nitroxide. Inorg Chem 2008; 47:9537-52. [PMID: 18781735 DOI: 10.1021/ic8011074] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We succeeded in synthesizing of a whole family of isostructural solvates of the copper(II) hexafluoroacetylacetonate complex with pyrazolyl-substituted nitronyl nitroxide (L): Cu(hfac)2L x 0.Solv. The main feature inherent in nature of Cu(hfac)2L x 0.5 Solv single crystals is their incredible mechanical stability and ability to undergo reversible structural rearrangements with temperature variation, accompanied by anomalies on the mu(eff(T)) dependence. Structural investigation of the complexes over a wide temperature range before and after the structural transition and the ensuing magnetic phase transition showed that the spatial peculiarities of the solvent molecules incorporated into the solid govern the character of the mu(eff(T)) dependence and the temperature region of the magnetic anomaly. Thus, doping of crystals with definite solvent molecules could be used as an efficient method of control over the magnetic anomaly temperature (T(a)). The investigation of this special series of crystals has revealed the relationship between the chemical step and the magnetic properties. It was shown that "mild" modification of T(a) for Cu(hfac)2L x 0.5 Solv required a much smaller structural step than the typical change of one -CH2- fragment in a homologous series in organic chemistry. Quantum-chemical calculations with the use of X-ray diffraction data allowed us to trace the character of changes in the exchange interaction parameters in the range of the phase transition. In the temperature range of the phase transition, the exchange parameter changes substantially. The gradual decrease in the magnetic moment, observed in most experiments during sample cooling to T(a), is the result of the gradual increase in the fraction of the low-temperature phase in the high-temperature phase.
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Affiliation(s)
- Victor I Ovcharenko
- International Tomography Center, Russian Academy of Sciences, Institutskaya Street 3A, Novosibirsk 630090, Russian Federation.
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Chukanov NV, Popov SA, Romanenko GV, Reznikov VA. The unusual thermal transformations of the dimethyl 2,2,3,3-tetramethyl-7a-R-1,2,3,7a-tetrahydroimidazo[1,2-b]isoxazole-6,7-dicarboxylate derivatives. Tetrahedron 2008. [DOI: 10.1016/j.tet.2008.05.038] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Tretyakov EV, Tolstikov SE, Gorelik EV, Fedin MV, Romanenko GV, Bogomyakov AS, Ovcharenko VI. Copper(II) complexes with pyrazolyl-substituted nitronyl and imino nitroxides. Polyhedron 2008. [DOI: 10.1016/j.poly.2007.11.003] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Veber SL, Fedin MV, Potapov AI, Maryunina KY, Romanenko GV, Sagdeev RZ, Ovcharenko VI, Goldfarb D, Bagryanskaya EG. High-field EPR reveals the strongly temperature-dependent exchange interaction in "breathing" crystals Cu(hfac)2L(R). J Am Chem Soc 2008; 130:2444-5. [PMID: 18232693 DOI: 10.1021/ja710773u] [Citation(s) in RCA: 85] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Sergey L Veber
- International Tomography Center SB RAS, Novosibirsk State University, 630090 Novosibirsk, Russia
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Pervukhina NV, Magarill SA, Borisov SV, Romanenko GV, Pal'chik NA. Crystal chemistry of compounds containing mercury in low oxidation states. Russ Chem Rev 2007. [DOI: 10.1070/rc1999v068n08abeh000507] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Ovcharenko VI, Gorelik EV, Fokin SV, Romanenko GV, Ikorskii VN, Krashilina AV, Cherkasov VK, Abakumov GA. Ligand Effects on the Ferro- to Antiferromagnetic Exchange Ratio in Bis(o-Semiquinonato)copper(II). J Am Chem Soc 2007; 129:10512-21. [PMID: 17676737 DOI: 10.1021/ja072463b] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Heterospin complexes [Cu(SQ)2Py].C7H8, Cu(SQ)2DABCO, and [Cu(SQ)2NIT-mPy].C6H6, where Cu(SQ)2 is bis(3,6-di-tert-butyl-o-benzosemiquinonato)copper(II), DABCO is 1,4-diazabicyclo(2,2,2)octane, and NIT-mPy is the nitronyl nitroxide 2-(pyridin-3-yl)-4,4,5,5-tetramethyl-4,5-dihydro-1H-imidazole-3-oxide-1-oxyl, have been synthesized. The molecules of these complexes have a specific combination of the intramolecular ferro- and antiferromagnetic exchange interactions between the odd electrons of Cu(II) and SQ ligands, characterized by large exchange coupling parameters |J| approximately 100-300 cm(-1). X-ray and magnetochemical studies of a series of mixed-ligand compounds revealed that an extra ligand (Py, NIT-mPy, or DABCO) coordinated to the metal atom produces a dramatic effect on the magnetic properties of the complex, changing the multiplicity of the ground state. Quantum chemical analysis of magnetostructural correlations showed that the energy of the antiferromagnetic exchange interaction between the odd electrons of the SQ ligands in the Cu(SQ)2 bischelate is extremely sensitive to both the nature of the extra ligand and structural distortions of the coordination unit, arising from extra ligand coordination.
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Affiliation(s)
- Victor I Ovcharenko
- International Tomography Center, Russian Academy of Sciences, 3A Institutskaya Street, 630090 Novosibirsk, Russian Federation.
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Vasilevsky SF, Mshvidobadze EV, Mamatyuk VI, Romanenko GV, Elguero J. Unexpected results in the heterocyclization of 5-acetylenylpyrazole-4-carboxylic acid hydrazides under the influence of CuCl: formation of a diazepinone and dehydrodimerization into the corresponding bis(pyrazolo[4,3-d][1,2]diazepinone). Tetrahedron Lett 2005. [DOI: 10.1016/j.tetlet.2005.04.127] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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