1
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Kühne IA, Ozarowski A, Sultan A, Esien K, Carter AB, Wix P, Casey A, Heerah-Booluck M, Keene TD, Müller-Bunz H, Felton S, Hill S, Morgan GG. Homochiral Mn 3+ Spin-Crossover Complexes: A Structural and Spectroscopic Study. Inorg Chem 2022; 61:3458-3471. [PMID: 35175771 PMCID: PMC8889584 DOI: 10.1021/acs.inorgchem.1c03379] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
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Structural, magnetic,
and spectroscopic data on a Mn3+ spin-crossover complex
with Schiff base ligand 4-OMe-Sal2323, isolated in crystal
lattices with five different counteranions,
are reported. Complexes of [Mn(4-OMe-Sal2323)]X where X
= ClO4– (1), BF4– (2), NO3– (3), Br– (4), and I– (5) crystallize isotypically in the chiral
orthorhombic space group P21212 with a range of spin state preferences for the [Mn(4-OMe-Sal2323)]+ complex cation over the temperature range
5–300 K. Complexes 1 and 2 are high-spin,
complex 4 undergoes a gradual and complete thermal spin
crossover, while complexes 3 and 5 show
stepped crossovers with different ratios of spin triplet and quintet
forms in the intermediate temperature range. High-field electron paramagnetic
resonance was used to measure the zero-field splitting parameters
associated with the spin triplet and quintet states at temperatures
below 10 K for complexes 4 and 2 with respective
values: DS=1 = +23.38(1) cm–1, ES=1 = +2.79(1) cm–1,
and DS=2 =
+6.9(3) cm–1, with a distribution of E parameters for the S = 2 state. Solid-state circular
dichroism (CD) spectra on high-spin complex 1 at room
temperature reveal a 2:1 ratio of enantiomers in the chiral conglomerate,
and solution CD measurements on the same sample in methanol show that
it is stable toward racemization. Solid-state UV–vis absorption
spectra on high-spin complex 1 and mixed S = 1/S = 2 sample 5 reveal different
intensities at higher energies, in line with the different electronic
composition. The statistical prevalence of homochiral crystallization
of [Mn(4-OMe-Sal2323)]+ in five lattices with
different achiral counterions suggests that the chirality may be directed
by the 4-OMe-Sal2323 ligand. Zero-field
splitting parameters of the spin triplet and
quintet forms of a spin-crossover Mn3+ complex stabilized
in lattices with different counterions are measured by high-field
electron paramagnetic resonance at different frequencies. The homochiral
crystallization of the enantiopure Δ or Λ forms of the
chelate complex, despite the use of achiral anions, is attributed
to the steric influence of the ligand substituent.
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Affiliation(s)
- Irina A Kühne
- School of Chemistry, University College Dublin (UCD), Belfield, Dublin 4, Ireland.,FZU - Institute of Physics - Czech Academy of Sciences, Na Slovance 1999/2, Prague 8 182 21, Czech Republic
| | - Andrew Ozarowski
- National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32310, United States
| | - Aizuddin Sultan
- School of Chemistry, University College Dublin (UCD), Belfield, Dublin 4, Ireland
| | - Kane Esien
- School of Mathematics and Physics, Queen's University Belfast, Belfast BT7 1NN, United Kingdom
| | - Anthony B Carter
- School of Chemistry, University College Dublin (UCD), Belfield, Dublin 4, Ireland
| | - Paul Wix
- School of Chemistry & CRANN Institute & AMBER Centre, Trinity College Dublin, University of Dublin, College Green, Dublin 2, Ireland
| | - Aoife Casey
- School of Chemistry, University College Dublin (UCD), Belfield, Dublin 4, Ireland
| | | | - Tony D Keene
- School of Chemistry, University College Dublin (UCD), Belfield, Dublin 4, Ireland
| | - Helge Müller-Bunz
- School of Chemistry, University College Dublin (UCD), Belfield, Dublin 4, Ireland
| | - Solveig Felton
- School of Mathematics and Physics, Queen's University Belfast, Belfast BT7 1NN, United Kingdom
| | - Stephen Hill
- National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32310, United States.,Department of Physics, Florida State University, Tallahassee, Florida 32306, United States
| | - Grace G Morgan
- School of Chemistry, University College Dublin (UCD), Belfield, Dublin 4, Ireland
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2
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Shylin SI, Shova S, Shepherd HJ, Ksenofontov V, Tremel W, Gural'skiy IA. 1D iron(II)-1,2,4-triazolic chains with spin crossover assembled from discrete trinuclear complexes. Dalton Trans 2022; 51:2364-2369. [PMID: 35043827 DOI: 10.1039/d2dt00004k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report on a molecular cationic iron(II) complex with a 4-amino-1,2,4-triazole ligand and a tetraiodomercurate anion exhibiting an incomplete spin crossover (SCO). The complex exhibits an unusual disordered structure with a linear arrangement of ligand and water molecules that can potentially accommodate up to four iron atoms, but both terminal metal positions have half chemical occupancies, while occupancies of all ligands are full. This corresponds to the crystallisation of disordered trinuclear complexes arranged into 1D supramolecular chains. Iron cations have different N6 or N3O3 coordination environments, leading to the thermally induced SCO in two thirds of the metal centres. This SCO behaviour was characterised by magnetic susceptibility measurements and Mössbauer spectroscopy.
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Affiliation(s)
- Sergii I Shylin
- Department of Chemistry, Taras Shevchenko National University of Kyiv, Volodymyrska 64, 01601 Kyiv, Ukraine. .,Department of Chemistry - Ångström Laboratory, Uppsala University, PO Box 523, 75120 Uppsala, Sweden
| | - Sergiu Shova
- Petru Poni Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41A, 700487 Iasi, Romania
| | - Helena J Shepherd
- Supramolecular, Interfacial & Synthetic Chemistry Group, School of Physical Sciences, University of Kent, Canterbury CT2 7NH, UK
| | - Vadim Ksenofontov
- Institute of Inorganic and Analytical Chemistry, Johannes Gutenberg University of Mainz, Duesbergweg 10-14, 55128 Mainz, Germany
| | - Wolfgang Tremel
- Institute of Inorganic and Analytical Chemistry, Johannes Gutenberg University of Mainz, Duesbergweg 10-14, 55128 Mainz, Germany
| | - Il'ya A Gural'skiy
- Department of Chemistry, Taras Shevchenko National University of Kyiv, Volodymyrska 64, 01601 Kyiv, Ukraine.
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3
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Shahid N, Burrows KE, Howard MJ, Pask CM, Cespedes O, McGowan PC, Halcrow MA. Spin-States of Diastereomeric Iron(II) Complexes of 2,6-Bis(thiazolin-2-yl)pyridine (ThioPyBox) Ligands and a Comparison with the Corresponding PyBox Derivatives. Inorg Chem 2021; 60:14336-14348. [PMID: 34472842 DOI: 10.1021/acs.inorgchem.1c01988] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
This report investigates homoleptic iron(II) complexes of thiazolinyl analogues of chiral PyBox tridentate ligands: 2,6-bis(4-phenyl-4,5-dihydrothiazol-2-yl)pyridine (L1Ph), 2,6-bis(4-isopropyl-4,5-dihydrothiazol-2-yl)pyridine (L1iPr), and 2,6-bis(4-tert-butyl-4,5-dihydrothiazol-2-yl)pyridine (L1t-Bu). Crystallographic data imply the larger and more flexible thiazolinyl rings reduce steric clashes between the R substituents in homochiral [Fe((R)-L1R)2]2+ or [Fe((S)-L1R)2]2+ (R = Ph, iPr, or t-Bu), compared to their PyBox (L2R) analogues. Conversely, the larger heterocyclic S atoms are in close contact with the R substituents in heterochiral [Fe((R)-L1Ph)((S)-L1Ph)]2+, giving it a more sterically hindered ligand environment than that in [Fe((R)-L2Ph)((S)-L2Ph)]2+ (L2Ph = 2,6-bis(4-phenyl-4,5-dihydrooxazol-2-yl)pyridine). Preformed [Fe((R)-L1Ph)((S)-L1Ph)]2+ and [Fe((R)-L1iPr)((S)-L1iPr)]2+ do not racemize by ligand redistribution in CD3CN solution, but homochiral [Fe(L1iPr)2]2+ and [Fe(L1t-Bu)2]2+ both undergo partial ligand displacement in that solvent. Homochiral [Fe(L1Ph)2]2+ and [Fe(L1iPr)2]2+ exhibit spin-crossover equilibria in CD3CN, centered at 344 ± 6 K and 277 ± 1 K respectively, while their heterochiral congeners are essentially low-spin within the liquid range of the solvent. These data imply that the diastereomers of [Fe(L1Ph)2]2+ and [Fe(L1iPr)2]2+ show a greater difference in their spin-state behaviors than was previous found for [Fe(L2Ph)2]2+. Gas-phase DFT calculations (B86PW91/def2-SVP) of the [Fe(L1R)2]2+ and [Fe(L2R)2]2+ complexes reproduce most of the observed trends, but they overstabilize the high-spin state of SCO-active [Fe(L1iPr)2]2+ by ca. 1.5 kcal mol-1. This might reflect the influence of intramolecular dispersion interactions on the spin states of these compounds. Attempts to model this with the dispersion-corrected functionals B97-D2 or PBE-D3 were less successful than our original protocol, confirming that the spin states of sterically hindered molecules are a challenging computational problem.
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Affiliation(s)
- Namrah Shahid
- School of Chemistry, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, United Kingdom
| | - Kay E Burrows
- School of Chemistry, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, United Kingdom
| | - Mark J Howard
- School of Chemistry, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, United Kingdom
| | - Christopher M Pask
- School of Chemistry, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, United Kingdom
| | - Oscar Cespedes
- School of Physics and Astronomy, University of Leeds, E. C. Stoner Building, Leeds LS2 9JT, United Kingdom
| | - Patrick C McGowan
- School of Chemistry, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, United Kingdom
| | - Malcolm A Halcrow
- School of Chemistry, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, United Kingdom
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4
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Kucheriv OI, Fritsky IO, Gural'skiy IA. Spin crossover in FeII cyanometallic frameworks. Inorganica Chim Acta 2021. [DOI: 10.1016/j.ica.2021.120303] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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5
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Sirenko VY, Kucheriv OI, Rotaru A, Fritsky IO, Gural'skiy IA. Direct Synthesis of Spin‐Crossover Complexes: An Unexpectedly Revealed New Iron‐Triazolic Structure. Eur J Inorg Chem 2020. [DOI: 10.1002/ejic.202000848] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Valerii Y. Sirenko
- Department of Chemistry Taras Shevchenko National University of Kyiv Volodymyrska St. 64 01601 Kyiv Ukraine
| | - Olesia I. Kucheriv
- Department of Chemistry Taras Shevchenko National University of Kyiv Volodymyrska St. 64 01601 Kyiv Ukraine
- UkrOrgSyntez Ltd Chervonotkatska St. 67 02094 Kyiv Ukraine
| | - Aurelian Rotaru
- Faculty of Electrical Engineering and Computer Science and MANSiD Research Center Stefan cel Mare University Universității St. 13 720229 Suceava Romania
| | - Igor O. Fritsky
- Department of Chemistry Taras Shevchenko National University of Kyiv Volodymyrska St. 64 01601 Kyiv Ukraine
- UkrOrgSyntez Ltd Chervonotkatska St. 67 02094 Kyiv Ukraine
| | - Il'ya A. Gural'skiy
- Department of Chemistry Taras Shevchenko National University of Kyiv Volodymyrska St. 64 01601 Kyiv Ukraine
- UkrOrgSyntez Ltd Chervonotkatska St. 67 02094 Kyiv Ukraine
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6
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Boniolo M, Shylin SI, Chernev P, Cheah MH, Heizmann PA, Huang P, Salhi N, Hossain K, Thapper A, Lundberg M, Messinger J. Spin transition in a ferrous chloride complex supported by a pentapyridine ligand. Chem Commun (Camb) 2020; 56:2703-2706. [PMID: 32057045 DOI: 10.1039/c9cc09630b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Ferrous chloride complexes [FeIILxCl] commonly attain a high-spin state independently of the supporting ligand(s) and temperature. Herein, we present the first report of a complete spin crossover with T1/2 = 80 K in [FeII(Py5OH)Cl]+ (Py5OH = pyridine-2,6-diylbis[di(pyridin-2-yl)methanol]). Both spin forms of the complex are analyzed by X-ray spectroscopy and DFT calculations.
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Affiliation(s)
- Manuel Boniolo
- Department of Chemistry -Ångström Laboratory, Uppsala University, PO Box 523, 75120 Uppsala, Sweden.
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7
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Sun XP, Tang Z, Yao ZS, Tao J. A homochiral 3D framework of mechanically interlocked 1D loops with solvent-dependent spin-state switching behaviors. Chem Commun (Camb) 2020; 56:133-136. [PMID: 31799549 DOI: 10.1039/c9cc09063k] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
An atypical homochiral spin-crossover (SCO) framework (1) constructed from mechanically interlocked 1D molecular loops was prepared. Due to the flexibility of the interlocked structure, the guest solvent molecules can be reversibly exchanged. Consequently, its SCO behavior was capable of modulating between one- and two-stepped transitions in response to acetonitrile and methanol.
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Affiliation(s)
- Xiao-Peng Sun
- Key Laboratory of Cluster Science of Ministry of Education, School of Chemistry and Chemical Engineering, Liangxiang Campus, Beijing Institute of Technology, Beijing 102488, People's Republic of China.
| | - Zheng Tang
- Key Laboratory of Cluster Science of Ministry of Education, School of Chemistry and Chemical Engineering, Liangxiang Campus, Beijing Institute of Technology, Beijing 102488, People's Republic of China.
| | - Zi-Shuo Yao
- Key Laboratory of Cluster Science of Ministry of Education, School of Chemistry and Chemical Engineering, Liangxiang Campus, Beijing Institute of Technology, Beijing 102488, People's Republic of China.
| | - Jun Tao
- Key Laboratory of Cluster Science of Ministry of Education, School of Chemistry and Chemical Engineering, Liangxiang Campus, Beijing Institute of Technology, Beijing 102488, People's Republic of China.
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8
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Jakobsen VB, O'Brien L, Novitchi G, Müller‐Bunz H, Barra A, Morgan GG. Chiral Resolution of a Mn
3+
Spin Crossover Complex. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201900765] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Vibe B. Jakobsen
- School of Chemistry University College Dublin Science Centre Belfield Dublin 4 Ireland
| | - Luke O'Brien
- School of Chemistry University College Dublin Science Centre Belfield Dublin 4 Ireland
| | - Ghenadie Novitchi
- Laboratoire National des Champs Magnétiques Intenses (LNCMI) Centre National de la Recherche Scientifique (CNRS) 25 Rue des Martyrs, BP 166 38042 Grenoble Cedex 9 France
| | - Helge Müller‐Bunz
- School of Chemistry University College Dublin Science Centre Belfield Dublin 4 Ireland
| | - Anne‐Laure Barra
- Laboratoire National des Champs Magnétiques Intenses (LNCMI) Centre National de la Recherche Scientifique (CNRS) 25 Rue des Martyrs, BP 166 38042 Grenoble Cedex 9 France
| | - Grace G. Morgan
- School of Chemistry University College Dublin Science Centre Belfield Dublin 4 Ireland
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9
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10
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Burrows KE, Kulmaczewski R, Cespedes O, Barrett SA, Halcrow MA. The speciation of homochiral and heterochiral diastereomers of homoleptic cobalt(II) and zinc(II) PyBox complexes. Polyhedron 2018. [DOI: 10.1016/j.poly.2018.04.030] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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11
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Synthesis, structure and luminescent of Ag based homochiral metal tetrazolate coordination polymers. INORG CHEM COMMUN 2018. [DOI: 10.1016/j.inoche.2018.01.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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12
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Senthil Kumar K, Ruben M. Emerging trends in spin crossover (SCO) based functional materials and devices. Coord Chem Rev 2017. [DOI: 10.1016/j.ccr.2017.03.024] [Citation(s) in RCA: 503] [Impact Index Per Article: 71.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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13
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Burrows KE, McGrath SE, Kulmaczewski R, Cespedes O, Barrett SA, Halcrow MA. Spin States of Homochiral and Heterochiral Isomers of [Fe(PyBox) 2 ] 2+ Derivatives. Chemistry 2017; 23:9067-9075. [PMID: 28387453 DOI: 10.1002/chem.201700820] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2017] [Indexed: 11/08/2022]
Abstract
The following iron(II) complexes of 2,6-bis(oxazolinyl)pyridine (PyBox; LH ) derivatives are reported: [Fe(LH )2 ][ClO4 ]2 (1); [Fe((R)-LMe )2 ][ClO4 ]2 ((R)-2; LMe =2,6-bis{4-methyloxazolinyl}pyridine); [Fe((R)-LPh )2 ][ClO4 ]2 ((R)-3) and [Fe((R)-LPh )((S)-LPh )][ClO4 ]2 ((RS)-3; LPh =2,6-bis{4-phenyloxazolinyl}pyridine); and [Fe((R)-LiPr )2 ][ClO4 ]2 ((R)-4) and [Fe((R)-LiPr )((S)-LiPr )][ClO4 ]2 ((RS)-4; LiPr =2,6-bis{4-isopropyloxazolinyl}pyridine). Solid (R)-3⋅MeNO2 exhibits an unusual very gradual, but discontinuous thermal spin-crossover with an approximate T1/2 of 350 K. The discontinuity around 240 K lies well below T1/2 , and is unconnected to a crystallographic phase change occurring at 170 K. Rather, it can be correlated with a gradual ordering of the ligand conformation as the temperature is raised. The other solid compounds either exhibit spin-crossover above room temperature (1 and (RS)-3), or remain high-spin between 5-300 K [(R)-2, (R)-4 and (RS)-4]. Homochiral (R)-3 and (R)-4 exhibit more twisted ligand conformations and coordination geometries than their heterochiral isomers, which can be attributed to steric clashes between ligand substituents [(R)-3]; or, between the isopropyl substituents of one ligand and the backbone of the other ((R)-4). In solution, (RS)-3 retains its structural integrity but (RS)-4 undergoes significant racemization through ligand redistribution by 1 H NMR. (R)-4 and (RS)-4 remain high-spin in solution, whereas the other compounds all undergo spin-crossover equilibria. Importantly, T1/2 for (R)-3 (244 K) is 34 K lower than for (RS)-3 (278 K) in CD3 CN, which is the first demonstration of chiral discrimination between metal ion spin states in a molecular complex.
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Affiliation(s)
- Kay E Burrows
- School of Chemistry, University of Leeds, Woodhouse Lane, Leeds, LS2 9JT, UK
| | - Sarah E McGrath
- School of Chemistry, University of Leeds, Woodhouse Lane, Leeds, LS2 9JT, UK
| | - Rafal Kulmaczewski
- School of Chemistry, University of Leeds, Woodhouse Lane, Leeds, LS2 9JT, UK
| | - Oscar Cespedes
- School of Physics and Astronomy, University of Leeds, E. C. Stoner Building, Leeds, LS2 9JT, UK
| | - Simon A Barrett
- School of Chemistry, University of Leeds, Woodhouse Lane, Leeds, LS2 9JT, UK
| | - Malcolm A Halcrow
- School of Chemistry, University of Leeds, Woodhouse Lane, Leeds, LS2 9JT, UK
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14
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Gural'skiy IA, Shylin SI, Ksenofontov V, Tremel W. Spin‐State‐Dependent Redox‐Catalytic Activity of a Switchable Iron(II) Complex. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700454] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Il'ya A. Gural'skiy
- Institute of Inorganic and Analytical Chemistry Johannes Gutenberg University of Mainz Duesbergweg 10‐14 55099 Mainz Germany
- Department of Chemistry Taras Shevchenko National University of Kyiv Volodymyrska St. 64 01601 Kyiv Ukraine
| | - Sergii I. Shylin
- Institute of Inorganic and Analytical Chemistry Johannes Gutenberg University of Mainz Duesbergweg 10‐14 55099 Mainz Germany
- Department of Chemistry Taras Shevchenko National University of Kyiv Volodymyrska St. 64 01601 Kyiv Ukraine
| | - Vadim Ksenofontov
- Institute of Inorganic and Analytical Chemistry Johannes Gutenberg University of Mainz Duesbergweg 10‐14 55099 Mainz Germany
| | - Wolfgang Tremel
- Institute of Inorganic and Analytical Chemistry Johannes Gutenberg University of Mainz Duesbergweg 10‐14 55099 Mainz Germany
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15
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Ueki Y, Okabayashi J, Kitazawa T. Guest Molecule Inserted Spin Crossover Complexes: Fe[4-(3-Pentyl)pyridine]2[Au(CN)2]2·Guest. CHEM LETT 2017. [DOI: 10.1246/cl.170149] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Yusuke Ueki
- Department of Chemistry, Toho University, 2-2-1 Miyama, Funabashi, Chiba 274-8510
| | - Jun Okabayashi
- Research Center for Spectrochemistry, The University of Tokyo, Bunkyo-ku, Tokyo 113-0033
| | - Takafumi Kitazawa
- Department of Chemistry, Toho University, 2-2-1 Miyama, Funabashi, Chiba 274-8510
- Research Center for Materials with Integrated Properties, Toho University, 2-2-1 Miyama, Funabashi, Chiba 274-8510
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16
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Xue YS, Tan X, Zhou M, Mei H, Xu Y. Synthesis, structures and magnetic properties of two chiral mixed-valence iron(ii,iii) coordination networks. Dalton Trans 2017; 46:16623-16630. [DOI: 10.1039/c7dt03411c] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Two rare chiral mixed-valence iron(ii,iii) coordination networks have been synthesized through spontaneous asymmetrical crystallization from achiral units in the assembly process.
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Affiliation(s)
- Yun-Shan Xue
- College of Chemical Engineering
- State Key Laboratory of Materials-Oriented Chemical Engineering
- Nanjing Tech University
- Nanjing
- China
| | - Xu Tan
- College of Chemical Engineering
- State Key Laboratory of Materials-Oriented Chemical Engineering
- Nanjing Tech University
- Nanjing
- China
| | - Mengjie Zhou
- College of Chemical Engineering
- State Key Laboratory of Materials-Oriented Chemical Engineering
- Nanjing Tech University
- Nanjing
- China
| | - Hua Mei
- College of Chemical Engineering
- State Key Laboratory of Materials-Oriented Chemical Engineering
- Nanjing Tech University
- Nanjing
- China
| | - Yan Xu
- College of Chemical Engineering
- State Key Laboratory of Materials-Oriented Chemical Engineering
- Nanjing Tech University
- Nanjing
- China
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17
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18
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Spin-Crossover Materials towards Microwave Radiation Switches. Sci Rep 2016; 6:38334. [PMID: 27910956 PMCID: PMC5133552 DOI: 10.1038/srep38334] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2016] [Accepted: 10/31/2016] [Indexed: 12/26/2022] Open
Abstract
Microwave electromagnetic radiation that ranges from one meter to one millimetre wavelengths is finding numerous applications for wireless communication, navigation and detection, which makes materials able to tune microwave radiation getting widespread interest. Here we offer a new way to tune GHz frequency radiation by using spin-crossover complexes that are known to change their various physical properties under the influence of diverse external stimuli. As a result of electronic re-configuration process, microwave absorption properties differ for high spin and low spin forms of the complex. The evolution of a microwave absorption spectrum for the switchable compound within the region of thermal transition indicates that the high-spin and the low-spin forms are characterized by a different attenuation of electromagnetic waves. Absorption and reflection coefficients were found to be higher in the high-spin state comparing to the low-spin state. These results reveal a considerable potential for the implementation of spin-crossover materials into different elements of microwave signal switching and wireless communication.
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19
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Kucheriv OI, Shylin SI, Ksenofontov V, Dechert S, Haukka M, Fritsky IO, Gural’skiy IA. Spin Crossover in Fe(II)–M(II) Cyanoheterobimetallic Frameworks (M = Ni, Pd, Pt) with 2-Substituted Pyrazines. Inorg Chem 2016; 55:4906-14. [DOI: 10.1021/acs.inorgchem.6b00446] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Olesia I. Kucheriv
- Department
of Chemistry, Taras Shevchenko National University of Kyiv, Volodymyrska
St. 64, 01601 Kyiv, Ukraine
| | - Sergii I. Shylin
- Department
of Chemistry, Taras Shevchenko National University of Kyiv, Volodymyrska
St. 64, 01601 Kyiv, Ukraine
- Institute of Inorganic and Analytical Chemistry, Johannes Gutenberg University of Mainz, Staudingerweg 9, D-55099 Mainz, Germany
| | - Vadim Ksenofontov
- Institute of Inorganic and Analytical Chemistry, Johannes Gutenberg University of Mainz, Staudingerweg 9, D-55099 Mainz, Germany
| | - Sebastian Dechert
- Institute of Inorganic Chemistry, Georg August University of Göttingen, Tammannstr. 4, D-37077 Göttingen, Germany
| | - Matti Haukka
- Department
of Chemistry, University of Jyväskylä, PO Box 35, FI-40014 Jyväskylä, Finland
| | - Igor O. Fritsky
- Department
of Chemistry, Taras Shevchenko National University of Kyiv, Volodymyrska
St. 64, 01601 Kyiv, Ukraine
| | - Il’ya A. Gural’skiy
- Department
of Chemistry, Taras Shevchenko National University of Kyiv, Volodymyrska
St. 64, 01601 Kyiv, Ukraine
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Gural'skiy IA, Shylin SI, Golub BO, Ksenofontov V, Fritsky IO, Tremel W. High temperature spin crossover in [Fe(pyrazine){Ag(CN)2}2] and its solvate. NEW J CHEM 2016. [DOI: 10.1039/c6nj01472k] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Thermally induced spin transition at 370 K has been observed in a Hofmann-clathrate-like metal–organic framework.
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Affiliation(s)
- Il'ya A. Gural'skiy
- Department of Chemistry
- Taras Shevchenko National University of Kyiv
- Kyiv 01601
- Ukraine
- Institute of Inorganic and Analytical Chemistry
| | - Sergii I. Shylin
- Department of Chemistry
- Taras Shevchenko National University of Kyiv
- Kyiv 01601
- Ukraine
- Institute of Inorganic and Analytical Chemistry
| | - Bohdan O. Golub
- Department of Chemistry
- Taras Shevchenko National University of Kyiv
- Kyiv 01601
- Ukraine
| | - Vadim Ksenofontov
- Institute of Inorganic and Analytical Chemistry
- Johannes Gutenberg University of Mainz
- Mainz 55099
- Germany
| | - Igor O. Fritsky
- Department of Chemistry
- Taras Shevchenko National University of Kyiv
- Kyiv 01601
- Ukraine
| | - Wolfgang Tremel
- Institute of Inorganic and Analytical Chemistry
- Johannes Gutenberg University of Mainz
- Mainz 55099
- Germany
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