1
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On the origin of non-Markovian kinetics of light-induced magneto-structural relaxation in “breathing” crystals. Russ Chem Bull 2022. [DOI: 10.1007/s11172-022-3541-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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2
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Synthesis, crystal structure, and magnetic properties of a nitronyl nitroxide biradical-coordinated copper(II) complex. JOURNAL OF CHEMICAL RESEARCH 2020. [DOI: 10.1177/1747519820982539] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
A coordination compound constructed from a nitronyl nitroxide biradical NITPh(3-NIT) and CuII(hfac)2(H2O)2 building blocks [NITPh(3-NIT) = 1,3-bis(1′-oxyl-3′-oxido-4′,4′, 5′, 5′-tetramethyl-4,5-dihydro-1 H-imidazol-2-y1)-benzene, hfac = hexafluoroacetylacetonato] is successfully synthesized. The crystal structure is determined by X-ray single-crystal diffraction. The asymmetric complex {[(NITPh(3-NIT)]Cu(hfac)2} consists of one Cu(II) ion and two >N–O• groups and adopts a distorted triangular bipyramid with a penta-coordinated central copper(II) atom and three hfac oxygen atoms at the base and a >N–O• oxygen atom and one hfac oxygen atom at the apices. Intramolecular O. . .O bonding and π–π stacking interactions are observed between molecules. A magnetic susceptibility study of the coordination compound shows antiferromagnetic interactions between Cu(II) ions and >N–O• groups and very weak ferromagnetic interactions between Cu(II) ions and the free >N–O• group through O. . .O bonding between the nitroxide group oxygen atom and the oxygen atom of hfac.
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3
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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] [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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4
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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] [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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5
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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] [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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6
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Bhatt P, Kolanji K, Ivanova A, Yogi A, Jakob G, Mukadam MD, Yusuf SM, Baumgarten M. Magnetic Exchange Interaction in Nitronyl Nitroxide Radical-Based Single Crystals of 3d Metal Complexes: A Combined Experimental and Theoretical Study. ACS OMEGA 2018; 3:2918-2933. [PMID: 31458563 PMCID: PMC6641457 DOI: 10.1021/acsomega.7b01669] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/30/2017] [Accepted: 02/22/2018] [Indexed: 06/10/2023]
Abstract
Two stable nitronyl nitroxide free radicals {R 1 = 4'-methoxy-phenyl-4,4,5,5,-tetramethylimidazoline-1-oxyl-3-oxide (NNPhOMe) and R 2 = 2-(2'-thienyl)-4,4,5,5-tetramethylimidazoline 3-oxide 1-oxyl (NNT)} are successfully synthesized using Ullmann condensation. The reactions of these two radicals with 3d transition metal ions, in the form of M(hfac)2 (where M = Co or Mn, hfac: hexafluoroacetylacetone), result in four metal-organic complexes Co(hfac)2(NNPhOMe)2, 1; Co(hfac)2(NNT)2·(H2O), 2; Mn(hfac)2(NNPhOMe)·x(C7H16), 3; and Mn(hfac)2(NNT)2, 4. The crystal structure and magnetic properties of these complexes are investigated by single-crystal X-ray diffraction, dc magnetization, infrared, and electron paramagnetic resonance spectroscopies. The compounds 1 and 4 crystallize in the triclinic, P1̅, space group, whereas complex 3 crystallizes in the monoclinic structure with the C2/c space group and forms chain-like structure along the c direction. The complex 2 crystallizes in the monoclinic symmetry with the P21/c space group in which the N-O unit of the radical coordinates with the Co ion through hydrogen bonding of a water molecule. All compounds exhibit antiferromagnetic interactions between the transition metal ions and nitronyl nitroxide radicals. The magnetic exchange interactions (J/K B) are derived using isotropic spin Hamiltonian H = -2J∑(S metal S radical) for the model fitting to the magnetic susceptibility data for 1, 2, 3, and 4. The exchange interaction strengths are found to be -328, -1.25, -248, and -256 K, for the 1, 2, 3, and 4 metal-organic complexes, respectively. Quantum chemical density functional theory (DFT) computations are carried out on several models of the metal-radical complexes to elucidate the magnetic interactions at the molecular level. The calculations show that a small part of the inorganic spins are delocalized over the oxygens from hfac {∼0.03 for Co(II) and ∼0.015 for Mn(II)}, whereas a more significant fraction {∼0.24 for Mn(II) and ∼0.13 for Co(II)} of delocalized spins from the metal ion is transferred to the coordinated oxygen atom(s) of nitronyl nitroxide.
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Affiliation(s)
- Pramod Bhatt
- Solid
State Physics Division, Bhabha Atomic Research
Centre, Mumbai 400 085, India
| | - Kubandiran Kolanji
- Max
Planck Institute for Polymer Research, Ackermannweg 10, D-55128 Mainz, Germany
| | - Anela Ivanova
- University
of Sofia, Faculty of Chemistry and Pharmacy, 1 James Bourchier Avenue, 1164 Sofia, Bulgaria
| | - Arvind Yogi
- Tata
Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai 400005, India
| | - Gerhard Jakob
- Institute
of Physics, University of Mainz, Staudinger Weg 7, 55128 Mainz, Germany
| | - Mayuresh D. Mukadam
- Solid
State Physics Division, Bhabha Atomic Research
Centre, Mumbai 400 085, India
| | - Seikh Mohammad Yusuf
- Solid
State Physics Division, Bhabha Atomic Research
Centre, Mumbai 400 085, India
- Homi
Bhabha
National Institute, Anushaktinagar, Mumbai 400 094, India
| | - Martin Baumgarten
- Max
Planck Institute for Polymer Research, Ackermannweg 10, D-55128 Mainz, Germany
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7
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Veber SL, Tumanov SV, Fursova EY, Shevchenko OA, Getmanov YV, Scheglov MA, Kubarev VV, Shevchenko DA, Gorbachev II, Salikova TV, Kulipanov GN, Ovcharenko VI, Fedin MV. X-band EPR setup with THz light excitation of Novosibirsk Free Electron Laser: Goals, means, useful extras. JOURNAL OF MAGNETIC RESONANCE (SAN DIEGO, CALIF. : 1997) 2018; 288:11-22. [PMID: 29360045 DOI: 10.1016/j.jmr.2018.01.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2017] [Revised: 01/10/2018] [Accepted: 01/11/2018] [Indexed: 06/07/2023]
Abstract
Electron Paramagnetic Resonance (EPR) station at the Novosibirsk Free Electron Laser (NovoFEL) user facility is described. It is based on X-band (∼9 GHz) EPR spectrometer and operates in both Continuous Wave (CW) and Time-Resolved (TR) modes, each allowing detection of either direct or indirect influence of high-power NovoFEL light (THz and mid-IR) on the spin system under study. The optics components including two parabolic mirrors, shutters, optical chopper and multimodal waveguide allow the light of NovoFEL to be directly fed into the EPR resonator. Characteristics of the NovoFEL radiation, the transmission and polarization-retaining properties of the waveguide used in EPR experiments are presented. The types of proposed experiments accessible using this setup are sketched. In most practical cases the high-power radiation applied to the sample induces its rapid temperature increase (T-jump), which is best visible in TR mode. Although such influence is a by-product of THz radiation, this thermal effect is controllable and can deliberately be used to induce and measure transient signals of arbitrary samples. The advantage of tunable THz radiation is the absence of photo-induced processes in the sample and its high penetration ability, allowing fast heating of a large portion of virtually any sample and inducing intense transients. Such T-jump TR EPR spectroscopy with THz pulses has been previewed for the two test samples, being a useful supplement for the main goals of the created setup.
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Affiliation(s)
- Sergey L Veber
- International Tomography Center, SB RAS, Novosibirsk 630090, Russia; Novosibirsk State University, Novosibirsk 630090, Russia.
| | - Sergey V Tumanov
- International Tomography Center, SB RAS, Novosibirsk 630090, Russia; Novosibirsk State University, Novosibirsk 630090, Russia
| | - Elena Yu Fursova
- International Tomography Center, SB RAS, Novosibirsk 630090, Russia
| | - Oleg A Shevchenko
- Budker Institute of Nuclear Physics, SB RAS, Novosibirsk 630090, Russia
| | | | | | - Vitaly V Kubarev
- Novosibirsk State University, Novosibirsk 630090, Russia; Budker Institute of Nuclear Physics, SB RAS, Novosibirsk 630090, Russia
| | | | | | | | | | | | - Matvey V Fedin
- International Tomography Center, SB RAS, Novosibirsk 630090, Russia; Novosibirsk State University, Novosibirsk 630090, Russia
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8
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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] [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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9
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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] [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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10
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11
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Morozov VA. Relaxation kinetics of photoexcited states in a chain of exchange clusters in the mean-field approximation. J STRUCT CHEM+ 2017. [DOI: 10.1134/s0022476616080011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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12
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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] [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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13
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Kulipanov GN, Bagryanskaya EG, Chesnokov EN, Choporova YY, Gerasimov VV, Getmanov YV, Kiselev SL, Knyazev BA, Kubarev VV, Peltek SE, Popik VM, Salikova TV, Scheglov MA, Seredniakov SS, Shevchenko OA, Skrinsky AN, Veber SL, Vinokurov NA. Novosibirsk Free Electron Laser—Facility Description and Recent Experiments. IEEE TRANSACTIONS ON TERAHERTZ SCIENCE AND TECHNOLOGY 2015. [DOI: 10.1109/tthz.2015.2453121] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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14
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Jung J, Guennic BL, Fedin MV, Ovcharenko VI, Calzado CJ. Mechanism of Magnetostructural Transitions in Copper-Nitroxide-Based Switchable Molecular Magnets: Insights from ab Initio Quantum Chemistry Calculations. Inorg Chem 2015; 54:6891-9. [PMID: 26125503 DOI: 10.1021/acs.inorgchem.5b00794] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The gradual magnetostructural transition in breathing crystals based on copper(II) and pyrazolyl-substituted nitronyl nitroxides has been analyzed by means of DDCI quantum chemistry calculations. The magnetic coupling constants (J) within the spin triads of Cu(hfac)2L(Bu)·0.5C8H18 have been evaluated for the X-ray structures reported at different temperatures. The coupling is strongly antiferromagnetic at low temperature and becomes ferromagnetic when the temperature increases. The intercluster magnetic coupling (J') is antiferromagnetic and shows a marked dependence on temperature. The magnetostructural transition can be reproduced using the calculated J values for each structure in the simulation of the magnetic susceptibility. However, the μ(T) curve can be improved nicely by considering the coexistence of two phases in the transition region, whose ratio varies with temperature corresponding to both the weakly and strongly coupled spin states. These results complement a recent VT-FTIR study on the parent Cu(hfac)2L(Pr) compound with a gradual magnetostructural transition.
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Affiliation(s)
- Julie Jung
- †Departamento de Química Física, Universidad de Sevilla, Sevilla, Spain.,‡Institut des Sciences Chimiques de Rennes, UMR 6226 CNRS, Université de Rennes 1, 263 Avenue du Général Leclerc, 35042 Cedex Rennes, France
| | - Boris Le Guennic
- ‡Institut des Sciences Chimiques de Rennes, UMR 6226 CNRS, Université de Rennes 1, 263 Avenue du Général Leclerc, 35042 Cedex Rennes, France
| | - Matvey V Fedin
- §International Tomography Center, Siberian Branch of Russian Academy of Science and Novosibirsk State University, 630090 Novosibirsk, Russia
| | - Victor I Ovcharenko
- §International Tomography Center, Siberian Branch of Russian Academy of Science and Novosibirsk State University, 630090 Novosibirsk, Russia
| | - Carmen J Calzado
- †Departamento de Química Física, Universidad de Sevilla, Sevilla, Spain
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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] [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] [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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17
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Morozov VA. Qualitative description of the transformation of thermal magneto-structural transitions in a chain of exchange clusters under the effect of external pressure. J STRUCT CHEM+ 2015. [DOI: 10.1134/s0022476614060055] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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18
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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] [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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19
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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] [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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20
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Reis SG, Del Águila-Sánchez MA, Guedes GP, Ferreira GB, Novak MA, Speziali NL, López-Ortiz F, Vaz MGF. Synthesis, crystal structures and magnetic behaviour of four coordination compounds constructed with a phosphinic amide-TEMPO radical and [M(hfac)2] (M = Cu(II), Co(II) and Mn(II)). Dalton Trans 2014; 43:14889-901. [PMID: 25177845 DOI: 10.1039/c4dt01444h] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
In the present work we describe the synthesis, crystal structures and magnetic properties of four coordination compounds obtained by assembling a new phosphinic amide containing the TEMPO moiety, 1-piperidinyloxy-4-[(diphenylphosphinyl)amino]-2,2,6,6-tetramethyl radical (dppnTEMPO), with [M(hfac)2] building blocks (M = Cu(II), Co(II), Mn(II)). The crystal structures of the coordination compounds revealed the usefulness of the functionalized radical to provide discrete or extended architectures. In the copper compound () the ligand is coordinated through the oxygen atom of the NP[double bond, length as m-dash]O linkage to the metal, which exists in a square pyramidal or octahedral geometry. For the cobalt and manganese complexes (), both the phosphinic amide and the nitroxide oxygen atoms are involved in the coordination to the metal leading to one dimensional systems. In the cobalt complex () an interesting spin topology in the zig-zag chain was obtained due to the oxygen atom of the phosphinic amide group being μ2 coordinated to two cobalt(ii) ions. The magnetic behaviour of the coordination compounds shows overall antiferromagnetic interactions involving the metal ion and the organic radical. DFT calculations were performed in order to assign the main path for the magnetic interactions.
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Affiliation(s)
- Samira G Reis
- Instituto de Química, Universidade Federal Fluminense, 24020-141 Niterói, RJ, Brazil.
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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] [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] [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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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] [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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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] [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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25
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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] [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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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] [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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Vaz MGF, Akpinar H, Guedes GP, Santos S, Novak MA, Lahti PM. Two co-crystalline M(hfac)2(IPhIN)2·M(hfac)2 (M = Mn, Co) compounds with a bis(iminoylnitroxide) biradical: structure and magnetism. NEW J CHEM 2013. [DOI: 10.1039/c3nj00047h] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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28
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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] [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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