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Serykh A, Tretyakov E, Fedyushin P, Ugrak B, Dutova T, Lalov A, Korlyukov A, Akyeva A, Syroeshkin M, Bogomyakov A, Romanenko G, Artiukhova N, Egorov M, Ovcharenko V. N-Fluoroalkylpyrazolyl-substituted Nitronyl Nitroxides. J Mol Struct 2022; 1269:133739. [DOI: 10.1016/j.molstruc.2022.133739] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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2
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Morozov VA. On the origin of non-Markovian kinetics of light-induced magneto-structural relaxation in “breathing” crystals. Russ Chem Bull 2022; 71:1363-8. [DOI: 10.1007/s11172-022-3541-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 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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3
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Agafonov MA, Alexandrov EV, Artyukhova NA, Bekmukhamedov GE, Blatov VA, Butova VV, Gayfulin YM, Garibyan AA, Gafurov ZN, Gorbunova YG, Gordeeva LG, Gruzdev MS, Gusev AN, Denisov GL, Dybtsev DN, Enakieva YY, Kagilev AA, Kantyukov AO, Kiskin MA, Kovalenko KA, Kolker AM, Kolokolov DI, Litvinova YM, Lysova AA, Maksimchuk NV, Mironov YV, Nelyubina YV, Novikov VV, Ovcharenko VI, Piskunov AV, Polyukhov DM, Polyakov VA, Ponomareva VG, Poryvaev AS, Romanenko GV, Soldatov AV, Solovyeva MV, Stepanov AG, Terekhova IV, Trofimova OY, Fedin VP, Fedin MV, Kholdeeva OA, Tsivadze AY, Chervonova UV, Cherevko AI, Shul′gin VF, Shutova ES, Yakhvarov DG. METAL-ORGANIC FRAMEWORKS IN RUSSIA: FROM THE SYNTHESIS AND STRUCTURE TO FUNCTIONAL PROPERTIES AND MATERIALS. J STRUCT CHEM+ 2022. [DOI: 10.1134/s0022476622050018] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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4
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Romanenko GV, Letyagin GA, Maryunina KY, Bogomyakov AS, Nishihara S, Inoue K, Ovcharenko VI. Effect of increasing pressure on the structure and temperature-induced changes in magnetic properties of heterospin complexes. Russ Chem Bull 2020; 69:1530-6. [DOI: 10.1007/s11172-020-2932-2] [Citation(s) in RCA: 4] [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: 10/23/2022]
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5
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Tumanov SV, Veber SL, Tolstikov SE, Artiukhova NA, Ovcharenko VI, Fedin MV. Exchange interactions in photoinduced magnetostructural states of copper( ii)–nitroxide spin dyads. Dalton Trans 2020; 49:5851-5858. [DOI: 10.1039/d0dt00706d] [Citation(s) in RCA: 3] [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: 01/14/2023]
Abstract
We investigate intra- and intercluster exchange couplings in photoinduced states of copper(ii)–nitroxide based molecular magnets (“breathing crystals”) using variable-temperature EPR spectroscopy.
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Affiliation(s)
- Sergey V. Tumanov
- International Tomography Center SB RAS
- 630090 Novosibirsk
- Russia
- Novosibirsk State University
- 630090 Novosibirsk
| | - Sergey L. Veber
- International Tomography Center SB RAS
- 630090 Novosibirsk
- Russia
- Novosibirsk State University
- 630090 Novosibirsk
| | | | | | | | - Matvey V. Fedin
- International Tomography Center SB RAS
- 630090 Novosibirsk
- Russia
- Novosibirsk State University
- 630090 Novosibirsk
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6
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Tretyakov E, Fedyushin P, Panteleeva E, Gurskaya L, Rybalova T, Bogomyakov A, Zaytseva E, Kazantsev M, Shundrina I, Ovcharenko V. Aromatic S NF-Approach to Fluorinated Phenyl tert-Butyl Nitroxides. Molecules 2019; 24:molecules24244493. [PMID: 31817965 PMCID: PMC6943699 DOI: 10.3390/molecules24244493] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2019] [Revised: 12/03/2019] [Accepted: 12/05/2019] [Indexed: 11/16/2022] Open
Abstract
The interaction of octafluorotoluene (1a), as well as pentafluorobenzonitrile (1b) with tert-butylamine, followed by the oxidation of thus formed tert-butylanilines (2a,b) with meta-chloroperoxybenzoic acid led to functionalized perfluorinated phenyl tert-butyl nitroxides [namely, 4-(N-tert-butyl(oxyl)amino)heptafluorotoluene (3a) and 4-(N-tert-butyl(oxyl)amino)tetrafluorobenzonitrile (3b)] with nearly quantitative total yields. The molecular and crystal structures of nitroxide 3a were proved by single crystal X-ray diffraction analysis. The radical nature of both nitroxides was confirmed by ESR data. The interaction of Cu(hfac)2 with the obtained nitroxides 3a,b gave corresponding trans-bis(1,1,1,5,5,5-hexafluoropentane-2,4-dionato-κ2O,O′)bis{4-(N-tert-butyl(oxyl)amino)perfluoroarene-κO}copper (II) complexes ([Cu(hfac)2(3a)2] and [Cu(hfac)2(3b)2]). X-ray crystal structure analysis showed square bipyramid coordination of a centrally symmetric Cu polyhedron with the axial positions occupied by oxygen atoms of the nitroxide groups. Magnetic measurements revealed intramolecular ferromagnetic exchange interactions between unpaired electrons of Cu(II) ions and paramagnetic ligands, with exchange interaction parameters JCu–R reaching 53 cm−1.
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Affiliation(s)
- Evgeny Tretyakov
- N. N. Vorozhtsov Institute of Organic Chemistry, 9 Ac. Lavrentiev Avenue, 630090 Novosibirsk, Russia; (P.F.); (E.P.); (L.G.); (T.R.); (E.Z.); (M.K.); (I.S.)
- Novosibirsk State University, 2 Pirogova Str., 630090 Novosibirsk, Russia;
- Correspondence: (E.T.); (V.O.)
| | - Pavel Fedyushin
- N. N. Vorozhtsov Institute of Organic Chemistry, 9 Ac. Lavrentiev Avenue, 630090 Novosibirsk, Russia; (P.F.); (E.P.); (L.G.); (T.R.); (E.Z.); (M.K.); (I.S.)
| | - Elena Panteleeva
- N. N. Vorozhtsov Institute of Organic Chemistry, 9 Ac. Lavrentiev Avenue, 630090 Novosibirsk, Russia; (P.F.); (E.P.); (L.G.); (T.R.); (E.Z.); (M.K.); (I.S.)
- Novosibirsk State University, 2 Pirogova Str., 630090 Novosibirsk, Russia;
| | - Larisa Gurskaya
- N. N. Vorozhtsov Institute of Organic Chemistry, 9 Ac. Lavrentiev Avenue, 630090 Novosibirsk, Russia; (P.F.); (E.P.); (L.G.); (T.R.); (E.Z.); (M.K.); (I.S.)
| | - Tatyana Rybalova
- N. N. Vorozhtsov Institute of Organic Chemistry, 9 Ac. Lavrentiev Avenue, 630090 Novosibirsk, Russia; (P.F.); (E.P.); (L.G.); (T.R.); (E.Z.); (M.K.); (I.S.)
- Novosibirsk State University, 2 Pirogova Str., 630090 Novosibirsk, Russia;
| | - Artem Bogomyakov
- Novosibirsk State University, 2 Pirogova Str., 630090 Novosibirsk, Russia;
- International Tomography Center, 3a Institutskaya Str., 630090 Novosibirsk, Russia
| | - Elena Zaytseva
- N. N. Vorozhtsov Institute of Organic Chemistry, 9 Ac. Lavrentiev Avenue, 630090 Novosibirsk, Russia; (P.F.); (E.P.); (L.G.); (T.R.); (E.Z.); (M.K.); (I.S.)
- Novosibirsk State University, 2 Pirogova Str., 630090 Novosibirsk, Russia;
| | - Maxim Kazantsev
- N. N. Vorozhtsov Institute of Organic Chemistry, 9 Ac. Lavrentiev Avenue, 630090 Novosibirsk, Russia; (P.F.); (E.P.); (L.G.); (T.R.); (E.Z.); (M.K.); (I.S.)
| | - Inna Shundrina
- N. N. Vorozhtsov Institute of Organic Chemistry, 9 Ac. Lavrentiev Avenue, 630090 Novosibirsk, Russia; (P.F.); (E.P.); (L.G.); (T.R.); (E.Z.); (M.K.); (I.S.)
- Novosibirsk State University, 2 Pirogova Str., 630090 Novosibirsk, Russia;
| | - Victor Ovcharenko
- International Tomography Center, 3a Institutskaya Str., 630090 Novosibirsk, Russia
- Correspondence: (E.T.); (V.O.)
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7
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de Souza MS, Briganti M, Reis SG, Stinghen D, Bortolot CS, Cassaro RAA, Guedes GP, da Silva FC, Ferreira VF, Novak MA, Soriano S, Totti F, Vaz MGF. Magnetic Cationic Copper(II) Chains and a Mononuclear Cobalt(II) Complex Containing [Ln(hfac) 4] - Blocks as Counterions. Inorg Chem 2019; 58:1976-1987. [PMID: 30644737 DOI: 10.1021/acs.inorgchem.8b02929] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [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
Four new heterospin compounds with molecular formula {[Cu2(hfac)3(TlTrzNIT)2][Ln(hfac)4]} n·C7H16 (LnIII = Gd (1), Tb (2), or Dy (3)) and [Co(hfac)(TlTrzNIT)2][Dy(hfac)4] (4), where hfac is hexafluoroacetylacetonato and TlTrzNIT is the nitronylnitroxide radical 1-( m-tolyl)-1 H-1,2,3-triazole-4-(4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide), were obtained. All structures were determined by single-crystal X-ray diffraction. In compounds 1-3, the TlTrzNIT radical is bridge-coordinated to copper(II) ions, leading to positively charged copper(II)-radical chains containing [Ln(hfac)4]- as counterions. In compound 4, the cobalt(II) ion is coordinated to two TlTrzNIT radicals and one hfac ligand in bidentate mode leading to a mononuclear cationic complex that contains [Dy(hfac)4]- as counterion. Magnetic measurements of all complexes were performed. Magnetic data were fit considering the contributions of the copper(II)-radical chain and a paramagnetic gadolinium(III) ion for 1. The sign and magnitude of the magnetic coupling constants extracted from the fit were confirmed by density functional theory calculations. The obtained spin topology shows an alternated ferro-antiferromagnetic chain. Field-induced single molecule magnet behavior was observed for the Dy derivatives 3 and 4, in agreement with CASSCF calculations performed for the latter system.
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Affiliation(s)
- Mateus S de Souza
- Instituto de Química , Universidade Federal Fluminense , Niterói , Rio de Janeiro , 24020-150 , Brazil
| | - Matteo Briganti
- Department of Chemistry "Ugo Schiff" and INSTM RU University of Florence , 50019 Sesto Fiorentino , Italy
| | - Samira G Reis
- Instituto de Química , Universidade Federal Fluminense , Niterói , Rio de Janeiro , 24020-150 , Brazil
| | - Danilo Stinghen
- Instituto de Química , Universidade Federal Fluminense , Niterói , Rio de Janeiro , 24020-150 , Brazil
| | - Carolina S Bortolot
- Instituto de Química , Universidade Federal Fluminense , Niterói , Rio de Janeiro , 24020-150 , Brazil
| | - Rafael A A Cassaro
- Instituto de Química , Universidade Federal do Rio de Janeiro , Rio de Janeiro , 21941-909 , Brazil
| | - Guilherme P Guedes
- Instituto de Química , Universidade Federal Fluminense , Niterói , Rio de Janeiro , 24020-150 , Brazil
| | - Fernando C da Silva
- Instituto de Química , Universidade Federal Fluminense , Niterói , Rio de Janeiro , 24020-150 , Brazil
| | - Vitor F Ferreira
- Instituto de Química , Universidade Federal Fluminense , Niterói , Rio de Janeiro , 24020-150 , Brazil
| | - Miguel A Novak
- Instituto de Física , Universidade Federal do Rio de Janeiro , Rio de Janeiro , 21941-972 , Brazil
| | - Stéphane Soriano
- Instituto de Física , Universidade Federal Fluminense , Niterói , Rio de Janeiro , 24020-140 , Brazil
| | - Federico Totti
- Department of Chemistry "Ugo Schiff" and INSTM RU University of Florence , 50019 Sesto Fiorentino , Italy
| | - Maria G F Vaz
- Instituto de Química , Universidade Federal Fluminense , Niterói , Rio de Janeiro , 24020-150 , Brazil
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8
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Sánchez-de-Armas R, Cruz Hernández N, Calzado CJ. Copper–nitroxide based breathing crystals: a unified mechanism of gradual magnetostructural transition supported by quantum chemistry calculations. Inorg Chem Front 2019. [DOI: 10.1039/c9qi00129h] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
A unified mechanism, based on the thermal average of two limit phases, governs the gradual magnetic transitions of Cu(hfac)2LR complexes.
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Affiliation(s)
| | - Norge Cruz Hernández
- Departamento de Física Aplicada I
- Escuela Politécnica Superior
- Universidad de Sevilla
- Spain
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9
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Sánchez-de-Armas R, Cruz Hernández N, Calzado CJ. Light-Induced Spin Transitions in Copper-Nitroxide-Based Switchable Molecular Magnets: Insights from Periodic DFT+U Calculations. Chemistry 2018; 24:18988-18997. [PMID: 30192035 DOI: 10.1002/chem.201803962] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2018] [Indexed: 11/09/2022]
Abstract
The electronic structure and magnetic interactions of three members of the breathing crystal Cu(hfac)2 LR family (hfac=hexafluoroacetylacetonato, LR =pyrazole-substituted nitronyl nitroxides with R=Me, Et, Pr, iPr, Bu ), mainly Cu(hfac)2 LPr (1), Cu(hfac)2 LBu ⋅0.5 C8 H18 (2) and Cu(hfac)2 LBu ⋅0.5 C8 H10 (3), have been analyzed by means of periodic plane-wave based DFT+U calculations. These CuII -nitroxide based molecular magnets display thermally and optically induced switchable behavior and light-induced excited spin state trapping phenomena. The calculations confirm the presence of temperature-dependent exchange interaction within the spin triads formed by the nitroxide-copper(II)-nitroxide units, in line with the changes observed in the effective magnetic moment. Moreover, they quantify the interchain interaction mediated by the terminal nitroxide group of two spin triads in neighboring polymer chains. This interaction competes with the exchange interaction within the spin triads at high temperature, and introduces 1D exchange channels that do not coincide with the polymeric chains. The density of states reveal that the low-lying conduction states potentially involved in the UV/Vis transitions are located on the nitroxide radicals, the hfac groups and the Cu atoms. Then, the density of states is almost independent of the solvent and the R group. This suggests the possibility of light-induced spin switching for other members of this family. The 500 nm band of the low-temperature phase can be ascribed to a ligand-to-metal charge transfer transition between the nitroxide and Cu bands.
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Affiliation(s)
| | - Norge Cruz Hernández
- Departamento de Física Aplicada I, Escuela Politécnica Superior, Universidad de Sevilla, 41011, Spain
| | - Carmen J Calzado
- Departamento de Química Física, Universidad de Sevilla, 41012, Spain
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10
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Dong X, Lorenc M, Tretyakov EV, Ovcharenko VI, Fedin MV. Light-Induced Spin State Switching in Copper(II)-Nitroxide-Based Molecular Magnet at Room Temperature. J Phys Chem Lett 2017; 8:5587-5592. [PMID: 29087205 DOI: 10.1021/acs.jpclett.7b02497] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Molecular magnets Cu(hfac)2LR exhibit an unusual type of photoinduced magnetostructural switching in exchange-coupled copper(II)-nitroxide clusters. Such photoswitching from strongly coupled to weakly coupled spin state (SS → WS) was recently found to be ultrafast, thus enhancing the interest in these systems and the scope of their potential applications. However, to date such SS → WS photoswitching was demonstrated only at cryogenic temperatures, being limited by the absence of suitable SS states and short relaxation times at T > 100 K. In this work we selected model compound Cu(hfac)2Liso-Pr residing in the mixed SS/WS state at room temperature and investigated it using femtosecond optical spectroscopy. Photoinduced spin dynamics was detected, and an ultrafast SS → WS photoswitching was for the first time demonstrated at room temperature, constituting an important milestone in the development of copper(II)-nitroxide molecular magnets for practical purposes.
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Affiliation(s)
- Xu Dong
- Institut de Physique de Rennes , UMR CNRS 6251, Universite de Rennes 1, 35042 Rennes, France
| | - Maciej Lorenc
- Institut de Physique de Rennes , UMR CNRS 6251, Universite de Rennes 1, 35042 Rennes, France
| | - Evgeny V Tretyakov
- International Tomography Center SB RAS , 630090, Novosibirsk, Russia
- Novosibirsk State University , 630090, Novosibirsk, Russia
| | | | - Matvey V Fedin
- International Tomography Center SB RAS , 630090, Novosibirsk, Russia
- Novosibirsk State University , 630090, Novosibirsk, Russia
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11
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Morozov VA, Sagdeev RZ. Influence of the interaction of polymeric chains on thermal transitions of Jahn—Teller exchange clusters in compounds of "breathing" crystal family. Russ Chem Bull 2017; 66:201-7. [DOI: 10.1007/s11172-017-1720-0] [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: 11/26/2022]
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12
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13
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Romanov V, Vorob'ev A, Bagryanskaya I, Parkhomenko D, Tretyakov E. 1,3-Dipolar Cycloaddition of a Nitronyl Nitroxide-Substituted Alkyne to Heteroaromatic N-Imines. Aust J Chem 2017. [DOI: 10.1071/ch17476] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [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
1,3-Dipolar cycloaddition of the triple bond in an ethynyl-substituted nitronyl nitroxide to heteroaromatic N-imines is described. The reaction opens a pathway to polyfunctional nitronyl nitroxides with pyrazolo[1,5-a]pyridine or related substituents. According to X-ray diffraction analysis, dihedral angles between the plane of the paramagnetic moiety and heteroaromatic cycle do not exceed 24°. Reactions between Cu(hfac)2 (hfac = hexafluoroacetylacetonate ion) and a pyrazolo[1,5-a]pyridine-substituted radical produced a polymer chain complex with a ‘head-to-tail’ motif resembling that in breathing crystals.
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14
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Barskaya IY, Veber SL, Suturina EA, Sherin PS, Maryunina KY, Artiukhova NA, Tretyakov EV, Sagdeev RZ, Ovcharenko VI, Gritsan NP, Fedin MV. Spin-state-correlated optical properties of copper(ii)–nitroxide based molecular magnets. Dalton Trans 2017; 46:13108-13117. [DOI: 10.1039/c7dt02719b] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Pronounced thermochromism of copper(ii)–nitroxide based molecular magnets is explained.
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Affiliation(s)
| | - Sergey L. Veber
- International Tomography Center SB RAS
- 630090 Novosibirsk
- Russia
- Novosibirsk State University
- 630090 Novosibirsk
| | | | - Peter S. Sherin
- International Tomography Center SB RAS
- 630090 Novosibirsk
- Russia
- Novosibirsk State University
- 630090 Novosibirsk
| | - Kseniya Yu. Maryunina
- Graduate School of Science and Center for Chiral Science
- Hiroshima University
- Higashi-Hiroshima
- Japan
| | | | | | | | | | - Nina P. Gritsan
- Novosibirsk State University
- 630090 Novosibirsk
- Russia
- Institute of Chemical Kinetics and Combustion SB RAS
- 630090 Novosibirsk
| | - Matvey V. Fedin
- International Tomography Center SB RAS
- 630090 Novosibirsk
- Russia
- Novosibirsk State University
- 630090 Novosibirsk
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15
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Fedin MV, Veber SL, Bagryanskaya EG, Ovcharenko VI. Electron paramagnetic resonance of switchable copper-nitroxide-based molecular magnets: An indispensable tool for intriguing systems. Coord Chem Rev 2015. [DOI: 10.1016/j.ccr.2014.11.015] [Citation(s) in RCA: 58] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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16
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Veber SL, Suturina EA, Fedin MV, Boldyrev KN, Maryunina KY, Sagdeev RZ, Ovcharenko VI, Gritsan NP, Bagryanskaya EG. FTIR Study of Thermally Induced Magnetostructural Transitions in Breathing Crystals. Inorg Chem 2015; 54:3446-55. [DOI: 10.1021/ic5031153] [Citation(s) in RCA: 19] [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: 11/28/2022]
Affiliation(s)
| | | | | | | | | | - Renad Z. Sagdeev
- Kazan (Volga Region) Federal University, Kremlevskaya St. 18, 420008 Kazan, Russia
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Barskaya IY, Veber SL, Fokin SV, Tretyakov EV, Bagryanskaya EG, Ovcharenko VI, Fedin MV. Structural specifics of light-induced metastable states in copper(ii)–nitroxide molecular magnets. Dalton Trans 2015; 44:20883-8. [DOI: 10.1039/c5dt03683f] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [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
Although thermally- and light-induced structures of molecular magnets Cu(hfac)2LR are principally similar, FTIR reveals differences in packing of peripheral groups.
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Affiliation(s)
- I. Yu. Barskaya
- International Tomography Center SB RAS
- Novosibirsk
- Russia
- Novosibirsk State University
- Novosibirsk
| | - S. L. Veber
- International Tomography Center SB RAS
- Novosibirsk
- Russia
- Novosibirsk State University
- Novosibirsk
| | - S. V. Fokin
- International Tomography Center SB RAS
- Novosibirsk
- Russia
| | - E. V. Tretyakov
- International Tomography Center SB RAS
- Novosibirsk
- Russia
- Novosibirsk State University
- Novosibirsk
| | - E. G. Bagryanskaya
- Novosibirsk State University
- Novosibirsk
- Russia
- N.N. Vorozhtsov Novosibirsk Institute of Organic Chemistry SB RAS
- Novosibirsk
| | | | - M. V. Fedin
- International Tomography Center SB RAS
- Novosibirsk
- Russia
- Novosibirsk State University
- Novosibirsk
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18
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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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19
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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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Kaszub W, Marino A, Lorenc M, Collet E, Bagryanskaya EG, Tretyakov EV, Ovcharenko VI, Fedin MV. Ultrafast Photoswitching in a Copper-Nitroxide-Based Molecular Magnet. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201403672] [Citation(s) in RCA: 5] [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: 11/08/2022]
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Kaszub W, Marino A, Lorenc M, Collet E, Bagryanskaya EG, Tretyakov EV, Ovcharenko VI, Fedin MV. Ultrafast Photoswitching in a Copper-Nitroxide-Based Molecular Magnet. Angew Chem Int Ed Engl 2014; 53:10636-40. [PMID: 25138683 DOI: 10.1002/anie.201403672] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2014] [Revised: 06/03/2014] [Indexed: 11/09/2022]
Affiliation(s)
- Wawrzyniec Kaszub
- Institut de Physique de Rennes, UMR UR1- CNRS 6251, Universite Rennes 1, 35042 Rennes cedex (France)
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22
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Maryunina KY, Romanenko GV, Zueva EM, Fokin SV, Bogomyakov AS, Ovcharenko VI. Complexes of CuII with nitroxides and their magnetochemical behavior. Russ Chem Bull 2014. [DOI: 10.1007/s11172-013-0339-z] [Citation(s) in RCA: 6] [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: 11/30/2022]
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23
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Barskaya IY, Tretyakov EV, Sagdeev RZ, Ovcharenko VI, Bagryanskaya EG, Maryunina KY, Takui T, Sato K, Fedin MV. Photoswitching of a Thermally Unswitchable Molecular Magnet Cu(hfac)2Li-Pr Evidenced by Steady-State and Time-Resolved Electron Paramagnetic Resonance. J Am Chem Soc 2014; 136:10132-8. [DOI: 10.1021/ja504774q] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Irina Yu. Barskaya
- International Tomography Center SB RAS, Institutskaya str. 3a, 630090 Novosibirsk, Russia
- Novosibirsk State University, Pirogova
str.2, 630090 Novosibirsk, Russia
| | - Evgeny V. Tretyakov
- International Tomography Center SB RAS, Institutskaya str. 3a, 630090 Novosibirsk, Russia
| | - Renad Z. Sagdeev
- International Tomography Center SB RAS, Institutskaya str. 3a, 630090 Novosibirsk, Russia
- Kazan (Volga Region) Federal University, Kremlevskaya St. 18, 420008 Kazan, Russia
| | - Victor I. Ovcharenko
- International Tomography Center SB RAS, Institutskaya str. 3a, 630090 Novosibirsk, Russia
| | - Elena G. Bagryanskaya
- International Tomography Center SB RAS, Institutskaya str. 3a, 630090 Novosibirsk, Russia
- Novosibirsk State University, Pirogova
str.2, 630090 Novosibirsk, Russia
- N.N. Vorozhtsov Novosibirsk Institute of Organic Chemistry SB RAS, Pr. Lavrentjeva 16, 630090 Novosibirsk, Russia
| | - Kseniya Yu. Maryunina
- International Tomography Center SB RAS, Institutskaya str. 3a, 630090 Novosibirsk, Russia
- Department
of Chemistry, Graduate School of Science, Hiroshima University, Higashi-Hiroshima 739-8526, Japan
| | - Takeji Takui
- Department
of Chemistry and Molecular Materials Science, Graduate School of Science, Osaka City University, Osaka 558-8585, Japan
- FIRST-Quantum Information Processing Project, JSPS, Tokyo 101-8430, Japan
| | - Kazunobu Sato
- Department
of Chemistry and Molecular Materials Science, Graduate School of Science, Osaka City University, Osaka 558-8585, Japan
- FIRST-Quantum Information Processing Project, JSPS, Tokyo 101-8430, Japan
| | - 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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24
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Fokin SV, Kostina ET, Tret’yakov EV, Romanenko GV, Bogomyakov AS, Sagdeev RZ, Ovcharenko VI. Spin transition in the molecular heterospin complex of Cu(hfac)2 with 4,4,5,5-tetramethyl-2-(1-methylpyrazol-5-yl)-4,5-dihydroimidazole-1-oxyl 3-oxide. Russ Chem Bull 2013; 62:661-71. [DOI: 10.1007/s11172-013-0089-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [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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25
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26
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Zhang X, Nishihara S, Nakano Y, Yoshida E, Kato C, Ren XM, Maryunina KY, Inoue K. A magnetically isolated cuprate spin-ladder system: synthesis, structures, and magnetic properties. Dalton Trans 2014; 43:12974-81. [DOI: 10.1039/c4dt01746c] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two magnetically isolated cuprate spin ladders have been synthesized. Their crystal structures and preliminary investigation into the magnetic properties were reported.
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Affiliation(s)
- Xiao Zhang
- Department of Chemistry
- Hiroshima University
- Higashi-hiroshima 739-8526, Japan
| | - Sadafumi Nishihara
- Department of Chemistry
- Hiroshima University
- Higashi-hiroshima 739-8526, Japan
- Institute for Advanced Materials Research
- Hiroshima University
| | - Yuki Nakano
- Department of Chemistry
- Hiroshima University
- Higashi-hiroshima 739-8526, Japan
| | - Erina Yoshida
- Department of Chemistry
- Hiroshima University
- Higashi-hiroshima 739-8526, Japan
| | - Chisato Kato
- Department of Chemistry
- Hiroshima University
- Higashi-hiroshima 739-8526, Japan
| | - Xiao-Ming Ren
- College of Science
- Nanjing University of Technology
- Nanjing 210009, P. R. China
- State Key Lab & Coordination Chemistry Institute
- Nanjing University
| | | | - Katsuya Inoue
- Department of Chemistry
- Hiroshima University
- Higashi-hiroshima 739-8526, Japan
- Institute for Advanced Materials Research
- Hiroshima University
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Wang YL, Gao YY, Yang MF, Gao T, Ma Y, Wang QL, Liao DZ. Four new Cu-coordination compounds based on different nitronyl nitroxide radicals: Structural design and magneto-structural correlations. Polyhedron 2013. [DOI: 10.1016/j.poly.2013.05.036] [Citation(s) in RCA: 9] [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: 11/17/2022]
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28
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Drozdyuk IY, Tolstikov SE, Tretyakov EV, Veber SL, Ovcharenko VI, Sagdeev RZ, Bagryanskaya EG, Fedin MV. Light-Induced Magnetostructural Anomalies in a Polymer Chain Complex of Cu(hfac)2 with tert-Butylpyrazolylnitroxides. J Phys Chem A 2013; 117:6483-8. [DOI: 10.1021/jp403977n] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Irina Yu. Drozdyuk
- International Tomography Center SB RAS, Institutskaya Street 3a, 630090 Novosibirsk,
Russia
| | | | - Evgeny V. Tretyakov
- International Tomography Center SB RAS, Institutskaya Street 3a, 630090 Novosibirsk,
Russia
| | - Sergey L. Veber
- International Tomography Center SB RAS, Institutskaya Street 3a, 630090 Novosibirsk,
Russia
| | - Victor I. Ovcharenko
- International Tomography Center SB RAS, Institutskaya Street 3a, 630090 Novosibirsk,
Russia
| | - Renad Z. Sagdeev
- International Tomography Center SB RAS, Institutskaya Street 3a, 630090 Novosibirsk,
Russia
| | - Elena G. Bagryanskaya
- International Tomography Center SB RAS, Institutskaya Street 3a, 630090 Novosibirsk,
Russia
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry SB RAS, Pr.
Lavrentjeva 9, 630090 Novosibirsk,
Russia
| | - Matvey V. Fedin
- International Tomography Center SB RAS, Institutskaya Street 3a, 630090 Novosibirsk,
Russia
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Abstract
A statistical theory of temperature-induced spin-crossover-like transitions has been developed for spin chains with a few exchange clusters in a unit cell. Using static magnetic susceptibility measurements, a general expression for the effective magnetic moment μ(eff) of exchange clusters is obtained for an arbitrary structure of cluster terms. For heterospin Cu(hfac)2L(R) complexes ("breathing crystals") with a "head-to-head" chain motif, a two-point approximation for a partition function of the Jahn-Teller Cu(+2) paramagnetic center (spin 1/2) is suggested. Theoretical results are compared with available experimental data on thermal spin-crossover-like transitions in the "breathing crystal" compounds. It is shown that the model developed is able to successfully describe both of the cases of smooth and abrupt (cooperative) spin transitions for chains of three-spin exchange clusters. Spin-crossover-like transitions of a new type with step-wise changes in a positive exchange integral are predicted.
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Affiliation(s)
- Vitaliy A Morozov
- International Tomography Centre of Siberian Branch of Russian Academy of Sciences, Novosibirsk, Russian Federation.
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30
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Veber SL, Fedin MV, Maryunina KY, Boldyrev KN, Sheglov MA, Kubarev VV, Shevchenko OA, Vinokurov NA, Kulipanov GN, Sagdeev RZ, Ovcharenko VI, Bagryanskaya EG. Influence of Intense THz Radiation on Spin State of Photoswitchable Compound Cu(hfac)2LPr. J Phys Chem A 2013; 117:1483-91. [DOI: 10.1021/jp311404t] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Sergey L. Veber
- International Tomography Center, SB RAS, 630090 Novosibirsk, Russia
| | - Matvey V. Fedin
- International Tomography Center, SB RAS, 630090 Novosibirsk, Russia
| | | | | | | | - Vitaly V. Kubarev
- Budker Institute of Nuclear Physics, SB RAS, 630090 Novosibirsk, Russia
- Novosibirsk State University, Novosibirsk 630090, Russia
| | | | | | | | - Renad Z. Sagdeev
- International Tomography Center, SB RAS, 630090 Novosibirsk, Russia
| | | | - Elena G. Bagryanskaya
- International Tomography Center, SB RAS, 630090 Novosibirsk, Russia
- N.N. Vorozhtsov Novosibirsk Institute of Organic Chemistry, SB RAS,
630090 Novosibirsk, Russia
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31
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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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32
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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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33
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Fedin MV, Bagryanskaya EG, Matsuoka H, Yamauchi S, Veber SL, Maryunina KY, Tretyakov EV, Ovcharenko VI, Sagdeev RZ. W-Band Time-Resolved Electron Paramagnetic Resonance Study of Light-Induced Spin Dynamics in Copper–Nitroxide-Based Switchable Molecular Magnets. J Am Chem Soc 2012; 134:16319-26. [DOI: 10.1021/ja306467e] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Matvey V. Fedin
- International Tomography Center SB RAS, Institutskaya str. 3a, 630090 Novosibirsk,
Russia
| | - Elena G. Bagryanskaya
- International Tomography Center SB RAS, Institutskaya str. 3a, 630090 Novosibirsk,
Russia
- N.N. Vorozhtsov Novosibirsk Institute of Organic Chemistry SB RAS, Pr. Lavrentjeva
9, 630090 Novosibirsk, Russia
| | - Hideto Matsuoka
- Institute of Multidisciplinary
Research for Advanced Materials, Tohoku University, Katahira 2-1-1, Aoba-ku, Sendai 980-8577, Japan
| | - Seigo Yamauchi
- Institute of Multidisciplinary
Research for Advanced Materials, Tohoku University, Katahira 2-1-1, Aoba-ku, Sendai 980-8577, Japan
| | - Sergey L. Veber
- International Tomography Center SB RAS, Institutskaya str. 3a, 630090 Novosibirsk,
Russia
| | - Ksenia Yu. Maryunina
- International Tomography Center SB RAS, Institutskaya str. 3a, 630090 Novosibirsk,
Russia
| | - Evgeny V. Tretyakov
- 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
| | - Renad Z. Sagdeev
- International Tomography Center SB RAS, Institutskaya str. 3a, 630090 Novosibirsk,
Russia
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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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Elmore CS, Powell ME, Xiong H, Wu Y, Wang L, Saunders D, Urbanek RA. Preparation of two D2 partial agonists in C-14 and stable isotope labeled forms. J Labelled Comp Radiopharm 2012. [DOI: 10.1002/jlcr.2951] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
| | - Mark E. Powell
- CNS-Chemistry; AstraZeneca Pharmaceuticals LP; Wilmington; DE; 19850; USA
| | | | | | - Lijuan Wang
- IsoSciences, LLC; King of Prussia; PA; 19406; USA
| | | | - Rebecca A. Urbanek
- CNS-Chemistry; AstraZeneca Pharmaceuticals LP; Wilmington; DE; 19850; USA
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Fedin MV, Maryunina KY, Sagdeev RZ, Ovcharenko VI, Bagryanskaya EG. Self-Decelerating Relaxation of the Light-Induced Spin States in Molecular Magnets Cu(hfac)2LR Studied by Electron Paramagnetic Resonance. Inorg Chem 2011; 51:709-17. [DOI: 10.1021/ic202248v] [Citation(s) in RCA: 31] [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: 11/28/2022]
Affiliation(s)
- Matvey V. Fedin
- International Tomography Center SB RAS, Institutskaya
str. 3a, 630090, Novosibirsk, Russia
| | - Ksenia Yu. Maryunina
- International Tomography Center SB RAS, Institutskaya
str. 3a, 630090, Novosibirsk, Russia
| | - Renad Z. Sagdeev
- 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
| | - Elena G. Bagryanskaya
- International Tomography Center SB RAS, Institutskaya
str. 3a, 630090, Novosibirsk, Russia
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Allão RA, Jordão AK, Resende JALC, Cunha AC, Ferreira VF, Novak MA, Sangregorio C, Sorace L, Vaz MGF. Determination of the relevant magnetic interactions in low-dimensional molecular materials: the fundamental role of single crystal high frequency EPR. Dalton Trans 2011; 40:10843-50. [PMID: 21860868 DOI: 10.1039/c1dt10780a] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [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 new one-dimensional copper(II) complex with formula [Cu(hfac)(2)(N(3)TEMPO)](n) (hfac = hexafluoroacetylacetonate and N(3)TEMPO = 4-azido-2,2,6,6-tetramethylpiperidine-1-oxyl) has been synthesized and investigated by X-ray crystallography, magnetometry and multifrequency single crystal EPR. The system crystallizes in the P1 space group with two non equivalent copper(II) ions in the unit cell, the two nitroxide radicals being coordinated to Cu(1) in axial positions. The copper(II) ions are bridged by N(3)TEMPO radicals resulting in a zig-zag chain structure. The magnetic susceptibility data were at first satisfactorily modeled assuming an alternating spin chain along the monodimensional covalent skeleton, with a ferromagnetic interaction between Cu(1) and the nitroxide moieties and a weaker antiferromagnetic interaction between these and Cu(2) (J(1) = -13.8 cm(-1), J(2) = +2.4 cm(-1)). However, single crystal EPR studies performed at the X- and W-band clearly demonstrate that the observed magnetic monodimensional character of the complex is actually due to the intermolecular contacts involving N(3)TEMPO ligands. This prompted us to fit the magnetic data using a consistent model, pointing out the fundamental role of single crystal EPR data in defining a correct model to describe the magnetic properties of molecular low dimensional systems.
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Affiliation(s)
- R A Allão
- Instituto de Química, Universidade Federal Fluminense, 24020-141, Niterói, RJ, Brazil
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38
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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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39
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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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40
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Abstract
The ground spin-state of [Cu(phpyNO)(2)(H(2)O)(2)](BF(4))(2) was switched between S(total) = 1/2 and 3/2 across 175 K. On warming, the space group was changed from P2(1)2(1)2(1) to C222(1) in a single-crystal-to-single-crystal manner, and the transient structure could be monitored by means of the crystallographic analysis. The copper-radical exchange coupling changed from 2J/k(B) = -463(3) to +312(6) K with rather small Cu-O-N-C(2py) twisting deformation on one side, while practically no distortion occurred on the other.
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Affiliation(s)
- Atsushi Okazawa
- Department of Engineering Science, The University of Electro-Communications, Chofu, Tokyo 182-8585, Japan
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41
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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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42
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Vancoillie S, Chalupský J, Ryde U, Solomon EI, Pierloot K, Neese F, Rulísek L. Multireference ab initio calculations of g tensors for trinuclear copper clusters in multicopper oxidases. J Phys Chem B 2010; 114:7692-702. [PMID: 20469875 DOI: 10.1021/jp103098r] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
EPR spectroscopy has proven to be an indispensable tool in elucidating the structure of metal sites in proteins. In recent years, experimental EPR data have been complemented by theoretical calculations, which have become a standard tool of many quantum chemical packages. However, there have only been a few attempts to calculate EPR g tensors for exchange-coupled systems with more than two spins. In this work, we present a quantum chemical study of structural, electronic, and magnetic properties of intermediates in the reaction cycle of multicopper oxidases and of their inorganic models. All these systems contain three copper(II) ions bridged by hydroxide or O(2-) anions and their ground states are antiferromagnetically coupled doublets. We demonstrate that only multireference methods, such as CASSCF/CASPT2 or MRCI can yield qualitatively correct results (compared to the experimental values) and consider the accuracy of the calculated EPR g tensors as the current benchmark of quantum chemical methods. By decomposing the calculated g tensors into terms arising from interactions of the ground state with the various excited states, the origin of the zero-field splitting is explained. The results of the study demonstrate that a truly quantitative prediction of the g tensors of exchange-coupled systems is a great challenge to contemporary theory. The predictions strongly depend on small energy differences that are difficult to predict with sufficient accuracy by any quantum chemical method that is applicable to systems of the size of our target systems.
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Affiliation(s)
- Steven Vancoillie
- Department of Chemistry, University of Leuven, Celestijnenlaan 200F, B-3001 Heverlee-Leuven, Belgium
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43
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Okazawa A, Hashizume D, Ishida T. Ferro- and Antiferromagnetic Coupling Switch Accompanied by Twist Deformation around the Copper(II) and Nitroxide Coordination Bond. J Am Chem Soc 2010; 132:11516-24. [DOI: 10.1021/ja102163d] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.4] [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)
- Atsushi Okazawa
- Department of Applied Physics and Chemistry, The University of Electro-Communications, Chofu, Tokyo 182-8585, Japan, and Advanced Technology Support Division, RIKEN (Institute of Physical and Chemical Research), Wako, Saitama 351-0198, Japan
| | - Daisuke Hashizume
- Department of Applied Physics and Chemistry, The University of Electro-Communications, Chofu, Tokyo 182-8585, Japan, and Advanced Technology Support Division, RIKEN (Institute of Physical and Chemical Research), Wako, Saitama 351-0198, Japan
| | - Takayuki Ishida
- Department of Applied Physics and Chemistry, The University of Electro-Communications, Chofu, Tokyo 182-8585, Japan, and Advanced Technology Support Division, RIKEN (Institute of Physical and Chemical Research), Wako, Saitama 351-0198, Japan
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44
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Tret’yakov EV, Koreneva OV, Romanenko GV, Bogomyakov AS, Ovcharenko I, Sagdeev RZ. Structure and magnetic properties of Cu(II) bischelate with spin-labeled aminoenal. J STRUCT CHEM+ 2009; 50:1193-6. [DOI: 10.1007/s10947-009-0177-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 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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45
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Morozov V, Lukzen N, Ovcharenko V. Spin crossover in an elastic chain of exchange clusters beyond mean field approximation. Phys Chem Chem Phys 2010; 12:13667-73. [DOI: 10.1039/c004287k] [Citation(s) in RCA: 16] [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: 11/21/2022]
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46
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Souza DA, Florencio AS, Soriano S, Calvo R, Sartoris RP, Walkimar de M Carneiro J, Sangregorio C, Novak MA, Vaz MGF. New copper(II)-radical one dimensional chain: Synthesis, crystal structure, EPR, magnetic properties and DFT calculations. Dalton Trans 2009:6816-24. [PMID: 19690694 DOI: 10.1039/b902967b] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [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
The novel chain compound [Cu(Phtfac)(2)(NITpPy)](n) (where NITpPy = 4-pyridyl-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide and Phtfac = 4,4,4-trifluoro-1-phenylbutane-1,3-dione) was synthesized and characterized structurally, magnetically and by EPR. The compound contains two non equivalent Cu(II) ions, Cu1 and Cu2, located at inversion centers and bridged by a NITpPy ligand coordinating Cu1 through the pyridine donor atom, and Cu2 through a N-O group, resulting in a head-to-head chain structure. The chain exhibits an unusual spin topology with two alternating pairs of magnetic coupling constants. The magnetic behavior was modeled considering a 16-membered ring with alternating exchange couplings. The best fit parameters indicate a ferromagnetic (J(1) = 29.4 cm(-1)), and antiferromagnetic (J(2) = -4.6 cm(-1)) couplings and an average g = 2.05, corresponding to a ground state with three parallel and one anti-parallel spin for each Cu(2)NITpPy(2) unit. DFT calculations allowed assigning the ferromagnetic coupling to Cu-O-NITpPy and the antiferromagnetic coupling to Cu-N(Py)-NITpPy. Single crystal EPR spectra display only one resonance for most field orientations, as a consequence of the collapse of the signals of the different spins produced by the exchange interactions. The observed g-tensor of this resonance is related to those expected for the Cu(II) and radical ions. Comparison of this compound with other Cu-NIT radicals chains bearing different substituents in the organic radicals, highlights that the beta-diketonate ligand plays an important role in determining the final architecture. Moreover, we show how a knowledge of the spin density distribution in the initial building blocks is essential to rationalize the magnetic behavior of the resulting product.
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Affiliation(s)
- Denise A Souza
- Instituto de Química, Universidade Federal Fluminense, 24020-141, Niterói, RJ, Brazil
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47
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Vancoillie S, Rulíšek L, Neese F, Pierloot K. Theoretical Description of the Structure and Magnetic Properties of Nitroxide−Cu(II)−Nitroxide Spin Triads by Means of Multiconfigurational Ab Initio Calculations. J Phys Chem A 2009; 113:6149-57. [DOI: 10.1021/jp900822v] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.4] [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)
- Steven Vancoillie
- Department of Chemistry, University of Leuven, Celestijnenlaan 200F, B-3001 Heverlee-Leuven, Belgium, Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, and Gilead Sciences Research Center at IOCB, Flemingovo nam. 2, 166 10 Praha 6, Czech Republic, and Institut für Pysikalische and Theoretische Chemie, Universität Bonn, Wegelerstrasse 12, D-53115 Bonn, Germany
| | - Lubomír Rulíšek
- Department of Chemistry, University of Leuven, Celestijnenlaan 200F, B-3001 Heverlee-Leuven, Belgium, Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, and Gilead Sciences Research Center at IOCB, Flemingovo nam. 2, 166 10 Praha 6, Czech Republic, and Institut für Pysikalische and Theoretische Chemie, Universität Bonn, Wegelerstrasse 12, D-53115 Bonn, Germany
| | - Frank Neese
- Department of Chemistry, University of Leuven, Celestijnenlaan 200F, B-3001 Heverlee-Leuven, Belgium, Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, and Gilead Sciences Research Center at IOCB, Flemingovo nam. 2, 166 10 Praha 6, Czech Republic, and Institut für Pysikalische and Theoretische Chemie, Universität Bonn, Wegelerstrasse 12, D-53115 Bonn, Germany
| | - Kristine Pierloot
- Department of Chemistry, University of Leuven, Celestijnenlaan 200F, B-3001 Heverlee-Leuven, Belgium, Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, and Gilead Sciences Research Center at IOCB, Flemingovo nam. 2, 166 10 Praha 6, Czech Republic, and Institut für Pysikalische and Theoretische Chemie, Universität Bonn, Wegelerstrasse 12, D-53115 Bonn, Germany
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48
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Tretyakov E, Tolstikov S, Mareev A, Medvedeva A, Romanenko G, Stass D, Bogomyakov A, Ovcharenko V. New Cascade Syntheses of Nitronyl Nitroxides and a New Synthetic Approach to Imino Nitroxides. European J Org Chem 2009. [DOI: 10.1002/ejoc.200801237] [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: 11/10/2022]
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49
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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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50
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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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