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Książek M, Weselski M, Kusz J, Bronisz R. Single crystal-to-single crystal transformation - from two distinct to three distinct spin crossover centers in 2D coordination polymer [Fe(bbtr) 3](CF 3SO 3) 2. Dalton Trans 2021; 51:958-968. [PMID: 34931210 DOI: 10.1039/d1dt03578a] [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
1,4-Di(1,2,3-triazol-1-yl)butane (bbtr) forms a two-dimensional (2D) coordination polymer (1) in a reaction with iron(II) triflate. In the crystal lattice there are two crystallographically unique iron(II) ions surrounded octahedrally by a 1,2,3-triazole ring coordinated through nitrogen atoms N3. Single crystal X-ray diffraction studies revealed that spin crossover for each crystallographically independent iron(II) ion proceeds at a different temperature (T1/2(Fe1) = 201 K; T1/2(Fe2) = 216 K), while the magnetic measurements showed that there is one step, complete thermally induced spin crossover (T1/2 = 205 K). Complex 1 undergoes, with time, single crystal-to-single crystal transformation (SCSC) to the converted system (1c) from the R3̄ to the P63 space group, accompanied by significant changes in the lattice parameter c (a shortening of approximately one-third) and consequently unit cell volume. Structural transformation is associated with rebuilding of the polymeric layer as well as the anion network, which is reflected in the results of Mössbauer studies. In the polymorphic system (1c) there are three crystallographically independent iron(II) ions. The temperature dependence results for magnetic susceptibility indicated complete, one-step spin crossover very similar to that of 1; however, single-crystal X-ray diffraction studies of 1c revealed that spin crossover for each crystallographically independent iron(II) ion occurs in a different manner, revealing three elementary stages (T1/2(Fe1) = 200 K; T1/2(Fe2) = 212 K, T1/2(Fe3) = 214 K).
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Affiliation(s)
- Maria Książek
- Institute of Physics, University of Silesia, 75 Pułku Piechoty 1, 41-500 Chorzów, Poland.
| | - Marek Weselski
- Faculty of Chemistry, University of Wrocław, F. Joliot-Curie 14, 50-383 Wrocław, Poland.
| | - Joachim Kusz
- Institute of Physics, University of Silesia, 75 Pułku Piechoty 1, 41-500 Chorzów, Poland.
| | - Robert Bronisz
- Faculty of Chemistry, University of Wrocław, F. Joliot-Curie 14, 50-383 Wrocław, Poland.
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Enríquez‐Cabrera A, Ridier K, Salmon L, Routaboul L, Bousseksou A. Complete and Versatile Post‐Synthetic Modification on Iron‐Triazole Spin Crossover Complexes: A Relevant Material Elaboration Method. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202100090] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Alejandro Enríquez‐Cabrera
- CNRS Laboratoire de Chimie de Coordination (LCC) 205 route de Narbonne, BP44099 Toulouse Cedex 4 31077 France
| | - Karl Ridier
- CNRS Laboratoire de Chimie de Coordination (LCC) 205 route de Narbonne, BP44099 Toulouse Cedex 4 31077 France
| | - Lionel Salmon
- CNRS Laboratoire de Chimie de Coordination (LCC) 205 route de Narbonne, BP44099 Toulouse Cedex 4 31077 France
| | - Lucie Routaboul
- CNRS Laboratoire de Chimie de Coordination (LCC) 205 route de Narbonne, BP44099 Toulouse Cedex 4 31077 France
| | - Azzedine Bousseksou
- CNRS Laboratoire de Chimie de Coordination (LCC) 205 route de Narbonne, BP44099 Toulouse Cedex 4 31077 France
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Jenni K, Scherthan L, Faus I, Marx J, Strohm C, Herlitschke M, Wille HC, Würtz P, Schünemann V, Wolny JA. Nuclear inelastic scattering and density functional theory studies of a one-dimensional spin crossover [Fe(1,2,4-triazole) 2(1,2,4-triazolato)](BF 4) molecular chain. Phys Chem Chem Phys 2017; 19:18880-18889. [PMID: 28702576 DOI: 10.1039/c7cp03690f] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Nuclear inelastic scattering (NIS) experiments have been performed in order to study the vibrational dynamics of the low- and high-spin states of the polynuclear 1D spin crossover compound [Fe(1,2,4-triazole)2(1,2,4-triazolato)](BF4) (1). Density functional theory (DFT) calculations using the functional B3LYP* and the basis set CEP-31G for heptameric and nonameric models of the compound yielded the normal vibrations and electronic energies for high-spin and low-spin isomers of three models differing in the distribution of anionic trz- ligands and BF4- anions. On the basis of the obtained energies a structural model with a centrosymmetric Fe(trzH)4(trz-)2 coordination core of the mononuclear unit of the chain is proposed. The obtained distribution of the BF4- counteranions in the proposed structure is similar to that obtained on the basis of X-ray powder diffraction studies by Grossjean et al. (Eur. J. Inorg. Chem., 2013, 796). The NIS data of the system diluted to 10% Fe(ii) content in a 90% Zn(ii) matrix (compound (2)) show a characteristic change of the spectral pattern of the low-spin centres, compared to the low-spin phase of the parent Fe(ii) complex (1). DFT calculations reveal that this is caused by a change of the structure of the neighbours of the low-spin centres. The spectral pattern of the high-spin centres in (2) is within a good approximation identical to that of the high-spin Fe(ii) isomer of (1). The inspection of the molecular orbitals of the monomeric model systems of [Fe(trzH)4(trz-)2] and [Fe(trzH)6], together with calculations of spin transition energies, point towards the importance of an electrostatic effect caused by the negatively charged ligands. This results in the stabilisation of the low-spin state of the complex containing the anionic ligand and shortening of the Fe-N(trz-) compared to the Fe-N(trzH) bond in high-spin, but not in low-spin [Fe(trzH)4(trz-)2].
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Affiliation(s)
- Kevin Jenni
- Department of Physics, University of Kaiserslautern, Erwin-Schrödinger-Str. 46, 67663 Kaiserslautern, Germany.
| | - Lena Scherthan
- Department of Physics, University of Kaiserslautern, Erwin-Schrödinger-Str. 46, 67663 Kaiserslautern, Germany.
| | - Isabelle Faus
- Department of Physics, University of Kaiserslautern, Erwin-Schrödinger-Str. 46, 67663 Kaiserslautern, Germany.
| | - Jennifer Marx
- Department of Physics, University of Kaiserslautern, Erwin-Schrödinger-Str. 46, 67663 Kaiserslautern, Germany.
| | - Cornelius Strohm
- Deutsches Elektronen Synchrotron (DESY), Notkestr. 85, Hamburg, Germany
| | | | | | - Peter Würtz
- Department of Physics, University of Kaiserslautern, Erwin-Schrödinger-Str. 46, 67663 Kaiserslautern, Germany.
| | - Volker Schünemann
- Department of Physics, University of Kaiserslautern, Erwin-Schrödinger-Str. 46, 67663 Kaiserslautern, Germany.
| | - Juliusz A Wolny
- Department of Physics, University of Kaiserslautern, Erwin-Schrödinger-Str. 46, 67663 Kaiserslautern, Germany.
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Arjmand F, Sharma S, Usman M, Leu BM, Hu MY, Toupet L, Gosztola D, Tabassum S. Vibrational dynamics (IR, Raman, NRVS) and a DFT study of a new antitumor tetranuclearstannoxane cluster, Sn(iv)-oxo-{di-o-vanillin} dimethyl dichloride. Phys Chem Chem Phys 2016; 18:17805-17809. [PMID: 27328161 DOI: 10.1039/c6cp02914k] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/12/2023]
Abstract
The vibrational dynamics of a newly synthesized tetrastannoxane was characterized with a combination of experimental (Raman, IR and tin-based nuclear resonance vibrational spectroscopy) and computational (DFT/B3LYP) methods, with an emphasis on the vibrations of the tin sites. The cytotoxic activity revealed a significant regression selectively against the human pancreatic cell lines.
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Affiliation(s)
- F Arjmand
- Department of Chemistry, Aligarh Muslim University, Aligarh 202002, India.
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5
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Raman and nuclear inelastic scattering study of the lattice dynamics of the [Fe(H 2 B(pz) 2 ) 2 (phen)] spin crossover complex. Chem Phys Lett 2016. [DOI: 10.1016/j.cplett.2016.04.014] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Unruh D, Homenya P, Kumar M, Sindelar R, Garcia Y, Renz F. Spin state switching of metal complexes by visible light or hard X-rays. Dalton Trans 2016; 45:14008-18. [DOI: 10.1039/c6dt01745b] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Different kinds of stimuli to induce spin crossover in iron compounds are covered, focusing on electromagnetic irradiation-induced spin state switching phenomena in mono- as well as multinuclear coordination compounds.
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Affiliation(s)
- Daniel Unruh
- Institute of Inorganic Chemistry
- Leibniz Universität Hannover
- 30167 Hannover
- Germany
| | - Patrick Homenya
- Institute of Inorganic Chemistry
- Leibniz Universität Hannover
- 30167 Hannover
- Germany
| | - Manish Kumar
- Faculty II
- University of Applied Science and Arts
- 30459 Hannover
- Germany
| | - Ralf Sindelar
- Faculty II
- University of Applied Science and Arts
- 30459 Hannover
- Germany
| | - Yann Garcia
- Institute of Condensed Matter and Nanosciences
- Molecules
- Solids and Reactivity (IMCN/MOST)
- Université catholique de Louvain
- 1348 Louvain-la-Neuve
| | - Franz Renz
- Institute of Inorganic Chemistry
- Leibniz Universität Hannover
- 30167 Hannover
- Germany
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Dîrtu MM, Schmit F, Naik AD, Rusu I, Rotaru A, Rackwitz S, Wolny JA, Schünemann V, Spinu L, Garcia Y. Two-Step Spin Transition in a 1D FeII1,2,4-Triazole Chain Compound. Chemistry 2015; 21:5843-55. [DOI: 10.1002/chem.201406231] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2014] [Revised: 01/18/2015] [Indexed: 11/10/2022]
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Abstract
The study of spin crossover compounds by means of theoretical or experimental approaches has provided interesting results in recent decades. The main feature of such compounds is the change in the spin state induced by many different external stimuli, i.e. temperature, light, pressure, solvent coordination and the electric field. Spin crossover systems are potentially more useful than other magnetic molecules because their switching behaviour can occur closer to room temperature, and they are thus candidates for use in spintronic devices. Here, I review the state of the art in quantum chemical approaches to the study of such systems and discuss experiments that have focused on transport properties in single-molecule, nano-objects or thin-film spin crossover systems.
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Affiliation(s)
- Eliseo Ruiz
- Departament de Química Inorgànica and Centre de Recerca en Química Teòrica, Universitat de Barcelona, Diagonal 645, 08028 Barcelona, Spain.
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Guillaume F, Tobon YA, Bonhommeau S, Létard JF, Moulet L, Freysz E. Photoswitching of the spin crossover polymeric material [Fe(Htrz)2(trz)](BF4) under continuous laser irradiation in a Raman scattering experiment. Chem Phys Lett 2014. [DOI: 10.1016/j.cplett.2014.04.024] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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10
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Fan Z, Wang YY, Xu YY, Su XM, Wu XX, Huo JZ, Ding B, Wang Y, Guo JH. Synthesis and characterization of a novel 3D porous luminescent Ag(I) framework with a multidentate triazole ligand. Inorganica Chim Acta 2014. [DOI: 10.1016/j.ica.2013.11.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Morozov VA. Cooperative spin-crossover-like transitions in the inhomogeneous chain of exchange clusters. Phys Chem Chem Phys 2013; 15:9931-9. [PMID: 23677133 DOI: 10.1039/c3cp50689d] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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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12
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Gütlich P, Gaspar AB, Garcia Y. Spin state switching in iron coordination compounds. Beilstein J Org Chem 2013; 9:342-91. [PMID: 23504535 PMCID: PMC3596041 DOI: 10.3762/bjoc.9.39] [Citation(s) in RCA: 477] [Impact Index Per Article: 43.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2012] [Accepted: 01/18/2013] [Indexed: 11/29/2022] Open
Abstract
The article deals with coordination compounds of iron(II) that may exhibit thermally induced spin transition, known as spin crossover, depending on the nature of the coordinating ligand sphere. Spin transition in such compounds also occurs under pressure and irradiation with light. The spin states involved have different magnetic and optical properties suitable for their detection and characterization. Spin crossover compounds, though known for more than eight decades, have become most attractive in recent years and are extensively studied by chemists and physicists. The switching properties make such materials potential candidates for practical applications in thermal and pressure sensors as well as optical devices. The article begins with a brief description of the principle of molecular spin state switching using simple concepts of ligand field theory. Conditions to be fulfilled in order to observe spin crossover will be explained and general remarks regarding the chemical nature that is important for the occurrence of spin crossover will be made. A subsequent section describes the molecular consequences of spin crossover and the variety of physical techniques usually applied for their characterization. The effects of light irradiation (LIESST) and application of pressure are subjects of two separate sections. The major part of this account concentrates on selected spin crossover compounds of iron(II), with particular emphasis on the chemical and physical influences on the spin crossover behavior. The vast variety of compounds exhibiting this fascinating switching phenomenon encompasses mono-, oligo- and polynuclear iron(II) complexes and cages, polymeric 1D, 2D and 3D systems, nanomaterials, and polyfunctional materials that combine spin crossover with another physical or chemical property.
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Affiliation(s)
- Philipp Gütlich
- Institut für Anorganische Chemie und Analytische Chemie, Johannes Gutenberg-Universität, Staudingerweg 9, 55099 Mainz, Germany
| | - Ana B Gaspar
- Institut de Ciència Molecular (ICMOL)/Departament de Química Inorgànica, Universitat de València, Edifici de Instituts de Paterna, Apartat de Correus 22085, 46071 València, Spain
| | - Yann Garcia
- Institute of Condensed Matter and Nanosciences, MOST – Inorganic Chemistry, Université Catholique de Louvain, Place L. Pasteur 1, 1348 Louvain la Neuve, Belgium
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Paulsen H, Schünemann V, Wolny JA. Progress in Electronic Structure Calculations on Spin-Crossover Complexes. Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201201289] [Citation(s) in RCA: 86] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Rackwitz S, Klopper W, Schünemann V, Wolny JA. Quantification of intramolecular cooperativity in polynuclear spin crossover Fe(ii) complexes by density functional theory calculations. Phys Chem Chem Phys 2013; 15:15450-8. [PMID: 23939140 DOI: 10.1039/c3cp52240g] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- Sergej Rackwitz
- University of Kaiserslautern, Department of Physics, Erwin Schrödinger Str. 46, 67663 Kaiserslautern, Germany.
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15
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Tobon YA, Kabalan L, Bonhommeau S, Daro N, Grosjean A, Guionneau P, Matar S, Létard JF, Guillaume F. Spin crossover complexes [Fe(NH2trz)3](X)2·nH2O investigated by means of polarized Raman scattering and DFT calculations. Phys Chem Chem Phys 2013; 15:18128-37. [DOI: 10.1039/c3cp52505h] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Wolny JA, Diller R, Schünemann V. Vibrational Spectroscopy of Mono- and Polynuclear Spin-Crossover Systems. Eur J Inorg Chem 2012. [DOI: 10.1002/ejic.201200059] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Rackwitz S, Wolny JA, Muffler K, Achterhold K, Rüffer R, Garcia Y, Diller R, Schünemann V. Vibrational properties of the polymeric spin crossover (SCO) Fe(ii) complexes [{Fe(4-amino-1,2,4-triazole)3}X2]n: a nuclear inelastic scattering (NIS), Raman and DFT study. Phys Chem Chem Phys 2012; 14:14650-60. [DOI: 10.1039/c2cp41455d] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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18
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Coordination Polymers and Metal Organic Frameworks Derived from 1,2,4-Triazole Amino Acid Linkers. Polymers (Basel) 2011. [DOI: 10.3390/polym3041750] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Naik AD, Beck J, Dîrtu MM, Bebrone C, Tinant B, Robeyns K, Marchand-Brynaert J, Garcia Y. Zinc complexes with 1,2,4-triazole functionalized amino acid derivatives: Synthesis, structure and β-lactamase assay. Inorganica Chim Acta 2011. [DOI: 10.1016/j.ica.2010.12.017] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Savard D, Cook C, Enright GD, Korobkov I, Burchell TJ, Murugesu M. Gradual spin crossover behaviour in a linear trinuclear FeII complex. CrystEngComm 2011. [DOI: 10.1039/c1ce05275f] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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