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Sundaresan S, Brooker S. Solution Spin Crossover Versus Speciation Effects: A Cautionary Tale. Inorg Chem 2023. [PMID: 37482662 DOI: 10.1021/acs.inorgchem.3c00186] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/25/2023]
Abstract
Two acyclic tetradentate Schiff base ligands, HLX-OH (X = H and Br), were synthesised by 2:1 condensation of either 2-pyridinecarboxaldehyde or 5-bromo-2-pyridinecarboxaldehyde and 1,3-diamino-2-propanol and then used to prepare six mononuclear complexes, [FeII(HLX-OH)(NCE)2], with three different NCE co-ligands (E = BH3, Se, and S). The apparent solution spin crossover switching temperature, T1/2, of these 6 complexes, determined by Evans method NMR studies, is tuned by several factors: (a) substituent X present at the 5 position of the pyridine ring of the ligand, (b) E present in the NCE co-ligand, (c) solvent employed (P'), and (d) potentially also by speciation effects. In CD3CN, for the pair of NCE = NCBH3 complexes, when X = H, the complex is practically LS (extrapolated T1/2 ∼624 K), whereas when X = Br, it is far lower (373 K), which implies a higher field strength when X = H than when it is Br. The same trend, X = H results in a higher apparent T1/2 than X = Br, is seen for the other two pairs of complexes, with E = Se (429 > 351 K, ΔT1/2 = 78 K) or S (361 > 342 K, ΔT1/2 = 19 K). For the family of three X = Br complexes, the change of E from BH3 (373 K) to Se (351 K) to S (342 K) leads to an overall ΔT1/2(apparent) = 31 K, whereas the decreases are far more pronounced in the X = H family (BH3 ∼624 > Se 429 > S 361 K). Changing the solvent used from CD3CN to (CD3)2CO and CD3NO2, for [FeII(HLBr-OH)(NCE)2] with either E = BH3 or S, revealed excellent, and very similar, positive linear correlations (R2 = 0.99) of increasing solvent polarity index P' (from 5 to 7) with increasing apparent T1/2 of the complex (E = BH3 gave T1/2 300 < 373 < 451 K , ΔT1/2 = 151 K; E = S gave T1/2 288 < 342 < 427 K, ΔT1/2 = 147 K). Several other solvent parameters were also correlated with the apparent T1/2 of these complexes (R2 = 0.74-0.96). Excellent linear correlations (R2 = 0.99) are also obtained with the coordination ability (aTM) of the three NCE co-ligands with the apparent T1/2 in both families of compounds, [FeII(HLX-OH)(NCE)2] where X = H or Br. The 15N NMR chemical shifts of the nitrogen atom in the three NCE co-ligands (direct measurement) show modest correlations (R2 = 0.74 for LH-OH family and 0.80 for LBr-OH family) with the apparent T1/2 values of the corresponding complexes.
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Affiliation(s)
- Sriram Sundaresan
- Department of Chemistry and the MacDiarmid Institute for Advanced Materials and Nanotechnology, University of Otago, P.O. Box 56, Dunedin 9054, New Zealand
| | - Sally Brooker
- Department of Chemistry and the MacDiarmid Institute for Advanced Materials and Nanotechnology, University of Otago, P.O. Box 56, Dunedin 9054, New Zealand
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2
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Achieving large thermal hysteresis in an anthracene-based manganese(II) complex via photo-induced electron transfer. Nat Commun 2022; 13:2646. [PMID: 35551184 PMCID: PMC9098415 DOI: 10.1038/s41467-022-30425-1] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Accepted: 04/29/2022] [Indexed: 11/16/2022] Open
Abstract
Achieving magnetic bistability with large thermal hysteresis is still a formidable challenge in material science. Here we synthesize a series of isostructural chain complexes using 9,10-anthracene dicarboxylic acid as a photoactive component. The electron transfer photochromic Mn2+ and Zn2+ compounds with photogenerated diradicals are confirmed by structures, optical spectra, magnetic analyses, and density functional theory calculations. For the Mn2+ analog, light irradiation changes the spin topology from a single Mn2+ ion to a radical-Mn2+ single chain, further inducing magnetic bistability with a remarkably wide thermal hysteresis of 177 K. Structural analysis of light irradiated crystals at 300 and 50 K reveals that the rotation of the anthracene rings changes the Mn1–O2–C8 angle and coordination geometries of the Mn2+ center, resulting in magnetic bistability with this wide thermal hysteresis. This work provides a strategy for constructing molecular magnets with large thermal hysteresis via electron transfer photochromism. Achieving magnetic bistability with large thermal hysteresis is still a challenge in material science. Here, the authors report a Mn(II) chain complex that enables light-induced magnetic bistability with a 177 K thermal hysteresis loop.
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Horniichuk OY, Ridier K, Molnár G, Kotsyubynsky VO, Shova S, Amirkhanov VM, Gural'skiy IA, Salmon L, Bousseksou A. Solvatomorphism, polymorphism and spin crossover in bis[hydrotris(1,2,3-triazol-1-yl)borate]iron( ii). NEW J CHEM 2022. [DOI: 10.1039/d2nj01471h] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We describe a detailed characterization of the spin crossover bis[hydrotris(1,2,3-triazol-1-yl)borate]iron(ii) complex ([Fe(HB(1,2,3-tz)3)2]) and solvatomorphs obtained by recrystallisation or single crystal to single crystal transformation.
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Affiliation(s)
- Oleksandr Ye. Horniichuk
- Taras Shevchenko National University of Kyiv, Department of Chemistry, 64 Volodymyrska St., 01601 Kyiv, Ukraine
- LCC, CNRS and Université de Toulouse (UPS, INP), 205 route de Narbonne, F-31077 Toulouse, France
| | - Karl Ridier
- LCC, CNRS and Université de Toulouse (UPS, INP), 205 route de Narbonne, F-31077 Toulouse, France
| | - Gábor Molnár
- LCC, CNRS and Université de Toulouse (UPS, INP), 205 route de Narbonne, F-31077 Toulouse, France
| | - Volodymyr O. Kotsyubynsky
- Department of Material Science and New Technology, Vasyl Stefanyk Precarpathian National University, Ivano-Frankivsk 76018, Ukraine
| | - Sergiu Shova
- “Petru Poni” Institute of Macromolecular Chemistry, 41A Aleea Gr. Ghica Voda, 700487 Iasi, Romania
| | - Vladimir M. Amirkhanov
- Taras Shevchenko National University of Kyiv, Department of Chemistry, 64 Volodymyrska St., 01601 Kyiv, Ukraine
| | - Il’ya A. Gural'skiy
- Taras Shevchenko National University of Kyiv, Department of Chemistry, 64 Volodymyrska St., 01601 Kyiv, Ukraine
| | - Lionel Salmon
- LCC, CNRS and Université de Toulouse (UPS, INP), 205 route de Narbonne, F-31077 Toulouse, France
| | - Azzedine Bousseksou
- LCC, CNRS and Université de Toulouse (UPS, INP), 205 route de Narbonne, F-31077 Toulouse, France
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4
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Saiki R, Miyamoto H, Sagayama H, Kumai R, Newton GN, Shiga T, Oshio H. Substituent dependence on the spin crossover behaviour of mononuclear Fe(ii) complexes with asymmetric tridentate ligands. Dalton Trans 2019; 48:3231-3236. [PMID: 30720038 DOI: 10.1039/c9dt00204a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Three mononuclear iron(ii) complexes of the formula [FeII(H2L1-3)2](BF4)2·x(solv.) (H2L1-3 = 2-[5-(R-phenyl)-1H-pyrazole-3-yl] 6-benzimidazole pyridine; H2L1: R = 4-methylphenyl, H2L2, R = 2,4,6-trimethylphenyl, H2L3, R = 2,3,4,5,6-pentamethylphenyl) (1, H2L1; 2, H2L2; 3, H2L3) with asymmetric tridentate ligands (H2L1-3) were synthesized and their structures and magnetic behaviour investigated. Significant structural distortions of the dihedral angles between phenyl and pyrazole groups were observed and found to depend on the nature of the substituent groups. Cryomagnetic studies reveal that 1 and 2 show gradual spin crossover behavior, while 3 remains in the high spin state between 1.8 and 300 K.
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Affiliation(s)
- Ryo Saiki
- Graduate School of Pure and Applied Sciences, University of Tsukuba, Tennodai 1-1-1, Tsukuba, Ibaraki 305-8571, Japan.
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5
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Djemel A, Stefanczyk O, Marchivie M, Trzop E, Collet E, Desplanches C, Delimi R, Chastanet G. Solvatomorphism-Induced 45 K Hysteresis Width in a Spin-Crossover Mononuclear Compound. Chemistry 2018; 24:14760-14767. [DOI: 10.1002/chem.201802572] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2018] [Indexed: 11/10/2022]
Affiliation(s)
- Abdelhak Djemel
- CNRS; Université de Bordeaux; ICMCB; 87 avenue du Dr. A. Schweitzer Pessac 33608 France
- Laboratoire de Traitement des Eaux et Valorisation des Déchets Industriels; Université Badji Mokhtar; Annaba Algérie
| | - Olaf Stefanczyk
- CNRS; Université de Bordeaux; ICMCB; 87 avenue du Dr. A. Schweitzer Pessac 33608 France
| | - Mathieu Marchivie
- CNRS; Université de Bordeaux; ICMCB; 87 avenue du Dr. A. Schweitzer Pessac 33608 France
| | - Elzbieta Trzop
- Univ Rennes 1; CNRS; Institut de Physique de Rennes, UMR 6251; 35042 Rennes France
| | - Eric Collet
- Univ Rennes 1; CNRS; Institut de Physique de Rennes, UMR 6251; 35042 Rennes France
| | - Cédric Desplanches
- CNRS; Université de Bordeaux; ICMCB; 87 avenue du Dr. A. Schweitzer Pessac 33608 France
| | - Rachid Delimi
- Laboratoire de Traitement des Eaux et Valorisation des Déchets Industriels; Université Badji Mokhtar; Annaba Algérie
| | - Guillaume Chastanet
- CNRS; Université de Bordeaux; ICMCB; 87 avenue du Dr. A. Schweitzer Pessac 33608 France
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6
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Bushuev MB, Krivopalov VP, Nikolaenkova EB, Vinogradova KA, Gatilov YV. Hysteretic spin crossover in isomeric iron(ii) complexes. Dalton Trans 2018; 47:9585-9591. [PMID: 29978158 DOI: 10.1039/c8dt02223b] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two mononuclear iron(ii) complexes with isomeric N,N,N-tridentate pyrimidine-based ligands were synthesized. Both complexes show reproducible hysteretic spin crossover. Low spin state to high spin state switching is cooperative due to autocatalysis.
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Affiliation(s)
- Mark B Bushuev
- Nikolaev Institute of Inorganic Chemistry, Siberian Branch of Russian Academy of Sciences, 3, Acad. Lavrentiev Ave., Novosibirsk, 630090, Russia.
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7
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Berezin AS, Vinogradova KA, Nadolinny VA, Sukhikh TS, Krivopalov VP, Nikolaenkova EB, Bushuev MB. Temperature- and excitation wavelength-dependent emission in a manganese(ii) complex. Dalton Trans 2018; 47:1657-1665. [PMID: 29327747 DOI: 10.1039/c7dt04535b] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A mononuclear manganese(ii) complex with a chelating 4-(3,5-diphenyl-1H-pyrazol-1-yl)-6-(piperidin-1-yl)pyrimidine ligand (L), [MnL2Cl2]·H2O, shows intriguing excitation wavelength-dependent emission. Depending on the excitation wavelength, the complex demonstrates three emission bands with the maxima at 380 nm, 440 nm and 495 nm. The 380 nm and 440 nm emissions originate from the π → π* and n → π* ligand-centered transitions. The long-wave 495 nm emission with microsecond lifetimes is related to the d-d transitions and/or metal-to-ligand and halogen-to-ligand charge transfer. The emission behavior of this complex is strongly temperature-dependent: upon cooling from 300 K down to 77 K, the intensity of emission considerably increases. The enhancement of the luminescence upon cooling is accompanied by the appearance of the vibrational structure. This complex is the first example of manganese(ii) complexes demonstrating excitation wavelength-dependent emission.
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Affiliation(s)
- Alexey S Berezin
- Nikolaev Institute of Inorganic Chemistry, Siberian Branch of Russian Academy of Sciences, 3, Acad. Lavrentiev Ave., Novosibirsk, 630090, Russia.
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8
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Abstract
Non-isothermal kinetic studies of spin crossover allow establishing a reaction model of hysteretic spin state switching.
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Affiliation(s)
- Mark B Bushuev
- Nikolaev Institute of Inorganic Chemistry, Siberian Branch of Russian Academy of Sciences, 3, Acad. Lavrentiev Ave., Novosibirsk, 630090, Russia.
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9
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Takahashi K, Okai M, Mochida T, Sakurai T, Ohta H, Yamamoto T, Einaga Y, Shiota Y, Yoshizawa K, Konaka H, Sasaki A. Contribution of Coulomb Interactions to a Two-Step Crystal Structure Phase Transformation Coupled with a Significant Change in Spin Crossover Behavior for a Series of Charged FeII Complexes from 2,6-Bis(2-methylthiazol-4-yl)pyridine. Inorg Chem 2018; 57:1277-1287. [DOI: 10.1021/acs.inorgchem.7b02721] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Kazuyuki Takahashi
- Department of Chemistry,
Graduate School of Science, Kobe University, 1-1 Rokkodai, Nada-ku, Kobe, Hyogo 657-8501, Japan
| | - Mitsunobu Okai
- Department of Chemistry,
Graduate School of Science, Kobe University, 1-1 Rokkodai, Nada-ku, Kobe, Hyogo 657-8501, Japan
| | - Tomoyuki Mochida
- Department of Chemistry,
Graduate School of Science, Kobe University, 1-1 Rokkodai, Nada-ku, Kobe, Hyogo 657-8501, Japan
| | - Takahiro Sakurai
- Research Facility Center for Science and
Technology, Kobe University, 1-1 Rokkodai, Nada-ku, Kobe, Hyogo 657-8501, Japan
| | - Hitoshi Ohta
- Molecular Photoscience Research Center, Kobe University, 1-1 Rokkodai, Nada-ku, Kobe, Hyogo 657-8501, Japan
| | - Takashi Yamamoto
- Department of Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan
| | - Yasuaki Einaga
- Department of Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan
| | - Yoshihito Shiota
- Institute for Materials Chemistry and Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Kazunari Yoshizawa
- Institute for Materials Chemistry and Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Hisashi Konaka
- XRD Application & Software Development, Rigaku Corporation, 3-9-12 Matsubara-cho, Akishima, Tokyo 196-8666, Japan
| | - Akito Sasaki
- XRD Application & Software Development, Rigaku Corporation, 3-9-12 Matsubara-cho, Akishima, Tokyo 196-8666, Japan
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10
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Berezin AS, Ivanova AD, Komarov VY, Nadolinny VA, Lavrenova LG. Influence of water on the structure and magnetic properties of a copper bromide coordination compound with 3-amino-4-ethoxycarbonylpyrazole. NEW J CHEM 2018. [DOI: 10.1039/c8nj00017d] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The influence of water on a polynuclear [CuL2Br2]n (1) copper bromide compound with 3-amino-4-ethoxycarbonylpyrazole (L) is investigated.
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Affiliation(s)
- A. S. Berezin
- Nikolaev Institute of Inorganic Chemistry
- Siberian Branch of Russian Academy of Sciences
- Novosibirsk
- Russia
| | - A. D. Ivanova
- Nikolaev Institute of Inorganic Chemistry
- Siberian Branch of Russian Academy of Sciences
- Novosibirsk
- Russia
- Novosibirsk State University
| | - V. Yu. Komarov
- Nikolaev Institute of Inorganic Chemistry
- Siberian Branch of Russian Academy of Sciences
- Novosibirsk
- Russia
- Novosibirsk State University
| | - V. A. Nadolinny
- Nikolaev Institute of Inorganic Chemistry
- Siberian Branch of Russian Academy of Sciences
- Novosibirsk
- Russia
| | - L. G. Lavrenova
- Nikolaev Institute of Inorganic Chemistry
- Siberian Branch of Russian Academy of Sciences
- Novosibirsk
- Russia
- Novosibirsk State University
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11
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Ridier K, Rat S, Salmon L, Nicolazzi W, Molnár G, Bousseksou A. Scan-rate and vacuum pressure dependence of the nucleation and growth dynamics in a spin-crossover single crystal: the role of latent heat. Phys Chem Chem Phys 2018; 20:9139-9145. [DOI: 10.1039/c7cp08522b] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
A heat exchange dependence was evidenced on both the hysteresis properties and the switching dynamics of a spin-crossover single crystal.
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Affiliation(s)
- Karl Ridier
- Laboratoire de Chimie de Coordination (LCC-CNRS), Université de Toulouse, UPS, INP
- F-31077 Toulouse
- France
| | - Sylvain Rat
- Laboratoire de Chimie de Coordination (LCC-CNRS), Université de Toulouse, UPS, INP
- F-31077 Toulouse
- France
| | - Lionel Salmon
- Laboratoire de Chimie de Coordination (LCC-CNRS), Université de Toulouse, UPS, INP
- F-31077 Toulouse
- France
| | - William Nicolazzi
- Laboratoire de Chimie de Coordination (LCC-CNRS), Université de Toulouse, UPS, INP
- F-31077 Toulouse
- France
| | - Gábor Molnár
- Laboratoire de Chimie de Coordination (LCC-CNRS), Université de Toulouse, UPS, INP
- F-31077 Toulouse
- France
| | - Azzedine Bousseksou
- Laboratoire de Chimie de Coordination (LCC-CNRS), Université de Toulouse, UPS, INP
- F-31077 Toulouse
- France
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12
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Bushuev MB, Vinogradova KA, Gatilov YV, Korolkov IV, Nikolaenkova EB, Krivopalov VP. Spin crossover in iron(II) hexafluorophosphate complexes with 2-(pyridin-2-yl)-4-(3,5-di-R-1H-pyrazol-1-yl)-6-methylpyrimidines. Inorganica Chim Acta 2017. [DOI: 10.1016/j.ica.2017.08.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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13
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Bushuev MB, Pishchur DP, Korolkov IV, Vinogradova KA. Prototypical iron(ii) complex with 4-amino-1,2,4-triazole reinvestigated: an unexpected impact of water on spin transition. Phys Chem Chem Phys 2017; 19:4056-4068. [DOI: 10.1039/c6cp06854e] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Variations in the outerspheric water molecule content induce drastic and unpredictable changes in the spin crossover regimes.
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Affiliation(s)
- Mark B. Bushuev
- Nikolaev Institute of Inorganic Chemistry
- Siberian Branch of Russian Academy of Sciences
- 3
- Acad. Lavrentiev Ave
- Novosibirsk
| | - Denis P. Pishchur
- Nikolaev Institute of Inorganic Chemistry
- Siberian Branch of Russian Academy of Sciences
- 3
- Acad. Lavrentiev Ave
- Novosibirsk
| | - Ilya V. Korolkov
- Nikolaev Institute of Inorganic Chemistry
- Siberian Branch of Russian Academy of Sciences
- 3
- Acad. Lavrentiev Ave
- Novosibirsk
| | - Katerina A. Vinogradova
- Nikolaev Institute of Inorganic Chemistry
- Siberian Branch of Russian Academy of Sciences
- 3
- Acad. Lavrentiev Ave
- Novosibirsk
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14
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Bushuev MB, Nikolaenkova EB, Krivopalov VP. Non-isothermal kinetics of spin crossover. Phys Chem Chem Phys 2017. [DOI: 10.1039/c7cp03442c] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Non-isothermal magnetic studies can be used to estimate the activation energy of cooperative spin transition.
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Affiliation(s)
- Mark B. Bushuev
- Nikolaev Institute of Inorganic Chemistry
- Siberian Branch of Russian Academy of Sciences
- Novosibirsk
- Russia
- Novosibirsk State University
| | - Elena B. Nikolaenkova
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry
- Siberian Branch of Russian Academy of Sciences
- Novosibirsk
- Russia
| | - Viktor P. Krivopalov
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry
- Siberian Branch of Russian Academy of Sciences
- Novosibirsk
- Russia
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15
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Rat S, Ridier K, Vendier L, Molnár G, Salmon L, Bousseksou A. Solvatomorphism and structural-spin crossover property relationship in bis[hydrotris(1,2,4-triazol-1-yl)borate]iron(ii). CrystEngComm 2017. [DOI: 10.1039/c7ce00741h] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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16
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Bushuev MB, Pishchur DP, Nikolaenkova EB, Krivopalov VP. Compensation effects and relation between the activation energy of spin transition and the hysteresis loop width for an iron(ii) complex. Phys Chem Chem Phys 2016; 18:16690-9. [DOI: 10.1039/c6cp01892k] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Wide thermal hysteresis loops for iron(ii) spin crossover complexes are associated with high activation barriers: the higher the activation barrier, the wider the hysteresis loop for a series of related spin crossover systems.
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Affiliation(s)
- Mark B. Bushuev
- Nikolaev Institute of Inorganic Chemistry
- Siberian Branch of Russian Academy of Sciences
- Novosibirsk
- Russia
- Novosibirsk State University
| | - Denis P. Pishchur
- Nikolaev Institute of Inorganic Chemistry
- Siberian Branch of Russian Academy of Sciences
- Novosibirsk
- Russia
| | - Elena B. Nikolaenkova
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry
- Siberian Branch of Russian Academy of Sciences
- Novosibirsk
- Russia
| | - Viktor P. Krivopalov
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry
- Siberian Branch of Russian Academy of Sciences
- Novosibirsk
- Russia
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