1
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Nath M, Joshi S, Mishra S. Ab initio calculation of magnetic anisotropy and thermal spin transition in the variable temperature crystal conformations of [Co(terpy) 2] 2. Phys Chem Chem Phys 2024; 26:15405-15416. [PMID: 38747204 DOI: 10.1039/d4cp00591k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2024]
Abstract
The structure-property correlation of [Co(terpy)2]2+, which shows a spin crossover at 270 K, has been computationally investigated based on its variable temperature crystal structures. Among the employed DFT functionals, only the re-parametrized hybrid B3LYP* functional could describe the correct spin transition temperature. Explicit consideration of metal-ligand sigma bonding with dynamic electron correlation is found to be necessary for an accurate determination of the SCO temperature with multi-reference calculations. The metal-ligand axial bond distances are found to be the most significant internal coordinates in deciding SCO. A small structural change along the axial distance causes a change in the t2g orbital splitting pattern and a reorientation of the magnetization axes at the SCO temperature. The complex shows an unusual triaxial magnetic anisotropy, with an easy axis of magnetization developing at higher temperatures. The strong coupling of low-frequency wagging motion of the two terpyridine ligands with the spin states of the complex provides an effective pathway for the relaxation of magnetization, resulting in a small magnetic anisotropy barrier.
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Affiliation(s)
- Moromi Nath
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, India.
| | - Shalini Joshi
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, India.
| | - Sabyashachi Mishra
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, India.
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2
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Zakrzewski J, Liberka M, Wang J, Chorazy S, Ohkoshi SI. Optical Phenomena in Molecule-Based Magnetic Materials. Chem Rev 2024; 124:5930-6050. [PMID: 38687182 PMCID: PMC11082909 DOI: 10.1021/acs.chemrev.3c00840] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/02/2024]
Abstract
Since the last century, we have witnessed the development of molecular magnetism which deals with magnetic materials based on molecular species, i.e., organic radicals and metal complexes. Among them, the broadest attention was devoted to molecule-based ferro-/ferrimagnets, spin transition materials, including those exploring electron transfer, molecular nanomagnets, such as single-molecule magnets (SMMs), molecular qubits, and stimuli-responsive magnetic materials. Their physical properties open the application horizons in sensors, data storage, spintronics, and quantum computation. It was found that various optical phenomena, such as thermochromism, photoswitching of magnetic and optical characteristics, luminescence, nonlinear optical and chiroptical effects, as well as optical responsivity to external stimuli, can be implemented into molecule-based magnetic materials. Moreover, the fruitful interactions of these optical effects with magnetism in molecule-based materials can provide new physical cross-effects and multifunctionality, enriching the applications in optical, electronic, and magnetic devices. This Review aims to show the scope of optical phenomena generated in molecule-based magnetic materials, including the recent advances in such areas as high-temperature photomagnetism, optical thermometry utilizing SMMs, optical addressability of molecular qubits, magneto-chiral dichroism, and opto-magneto-electric multifunctionality. These findings are discussed in the context of the types of optical phenomena accessible for various classes of molecule-based magnetic materials.
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Affiliation(s)
- Jakub
J. Zakrzewski
- Faculty
of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Krakow, Poland
- Doctoral
School of Exact and Natural Sciences, Jagiellonian
University, Lojasiewicza
11, 30-348 Krakow, Poland
| | - Michal Liberka
- Faculty
of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Krakow, Poland
- Doctoral
School of Exact and Natural Sciences, Jagiellonian
University, Lojasiewicza
11, 30-348 Krakow, Poland
| | - Junhao Wang
- Department
of Materials Science, Faculty of Pure and Applied Science, University of Tsukuba, 1-1-1 Tonnodai, Tsukuba, Ibaraki 305-8573, Japan
| | - Szymon Chorazy
- Faculty
of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Krakow, Poland
| | - Shin-ichi Ohkoshi
- Department
of Chemistry, School of Science, The University
of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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3
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Jordan DN, Straßburg PG, Woschko D, Carrella LM, Cuignet LP, Eickmeier K, Dronskowski R, Garcia Y, Rentschler E, Janiak C. Interpenetration Phenomena via Anion Template Effects in Fe(II) and Co(II) Coordination Networks with a Bis-(1,2,4-triazole) Ligand. Polymers (Basel) 2023; 15:3286. [PMID: 37571180 PMCID: PMC10422438 DOI: 10.3390/polym15153286] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Revised: 07/30/2023] [Accepted: 07/31/2023] [Indexed: 08/13/2023] Open
Abstract
Seven new coordination networks, [Fe(tbbt)3](BF4)2 (1), [Co(tbbt)3](BF4)2 (2), [Fe(tbbt)3](ClO4)2 (3), [Co(tbbt)3](ClO4)2 (4), [Fe(NCS)2(tbbt)2] (5), [Co(NCS)2(tbbt)2] (6), and [Fe(H2O)2(tbbt)2]Br2·2H2O (7), were synthesized with the linker 1,1'-(trans-2-butene-1,4-diyl)bis-1,2,4-triazole (tbbt) and structurally investigated. The structure of complexes 1-4 is composed of three interpenetrating, symmetry-related 3D networks. Each individual 3D network forms a primitive, nearly cubic lattice (pcu) with BF4- or ClO4- anions present in the interstitial spaces. The structure of compounds 5 and 6 is composed of two-dimensional sql layers, which are parallel to each other in the AB stacking type. These layers are interpenetrated by one-dimensional chains, both having the same formula unit, [M(NCS)2(tbbt)2] (M = Fe, Co). The structure of compound 7 consists of parallel, two-dimensional sql layers in the ABCD stacking type. The interpenetration in 1-6 is not controlled by π-π-interactions between the triazole rings or C=C bonds, as could have been expected, but by (triazole)C-H⋯F4B, C-H⋯O4Cl, and C-H⋯SCN anion hydrogen bonds, which suggests a template effect of the respective non-coordinated or coordinated anion for the interpenetration. In 7, the (triazole)C-H⋯Br anion interactions are supplemented by O-H⋯O and O-H⋯Br hydrogen bonds involving the aqua ligand and crystal water molecules. It is evident that the coordinated and non-coordinated anions play an essential role in the formation of the networks and guide the interpenetration. All iron(II) coordination networks are colorless, off-white to yellow-orange, and have the metal ions in the high-spin state down to 77 K. Compound 5 stays in the high spin state even at temperatures down to 10 K.
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Affiliation(s)
- Dustin N. Jordan
- Institut für Anorganische Chemie und Strukturchemie, Heinrich-Heine-Universität, D-40204 Düsseldorf, Germany; (D.N.J.); (P.G.S.); (D.W.); (L.P.C.)
| | - Patrick G. Straßburg
- Institut für Anorganische Chemie und Strukturchemie, Heinrich-Heine-Universität, D-40204 Düsseldorf, Germany; (D.N.J.); (P.G.S.); (D.W.); (L.P.C.)
| | - Dennis Woschko
- Institut für Anorganische Chemie und Strukturchemie, Heinrich-Heine-Universität, D-40204 Düsseldorf, Germany; (D.N.J.); (P.G.S.); (D.W.); (L.P.C.)
| | - Luca M. Carrella
- Department of Chemistry, Johannes Gutenberg University Mainz, D-55128 Mainz, Germany; (L.M.C.); (E.R.)
| | - Laure P. Cuignet
- Institut für Anorganische Chemie und Strukturchemie, Heinrich-Heine-Universität, D-40204 Düsseldorf, Germany; (D.N.J.); (P.G.S.); (D.W.); (L.P.C.)
- Institute of Condensed Matter and Nanosciences, Molecular Chemistry, Materials and Catalysis (IMCN/MOST), Université Catholique de Louvain, 1348 Louvain-la-Neuve, Belgium;
| | - Katharina Eickmeier
- Institute of Inorganic Chemistry, RWTH Aachen University, D-52056 Aachen, Germany; (K.E.); (R.D.)
| | - Richard Dronskowski
- Institute of Inorganic Chemistry, RWTH Aachen University, D-52056 Aachen, Germany; (K.E.); (R.D.)
| | - Yann Garcia
- Institute of Condensed Matter and Nanosciences, Molecular Chemistry, Materials and Catalysis (IMCN/MOST), Université Catholique de Louvain, 1348 Louvain-la-Neuve, Belgium;
| | - Eva Rentschler
- Department of Chemistry, Johannes Gutenberg University Mainz, D-55128 Mainz, Germany; (L.M.C.); (E.R.)
| | - Christoph Janiak
- Institut für Anorganische Chemie und Strukturchemie, Heinrich-Heine-Universität, D-40204 Düsseldorf, Germany; (D.N.J.); (P.G.S.); (D.W.); (L.P.C.)
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4
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Nadeem M, Cruddas J, Ruzzi G, Powell BJ. Toward High-Temperature Light-Induced Spin-State Trapping in Spin-Crossover Materials: The Interplay of Collective and Molecular Effects. J Am Chem Soc 2022; 144:9138-9148. [PMID: 35546521 DOI: 10.1021/jacs.2c03202] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Spin-crossover (SCO) materials display many fascinating behaviors including collective phase transitions and spin-state switching controlled by external stimuli, e.g., light and electrical currents. As single-molecule switches, they have been fêted for numerous practical applications, but these remain largely unrealized-partly because of the difficulty of switching these materials at high temperatures. We introduce a semiempirical microscopic model of SCO materials combining crystal field theory with elastic intermolecular interactions. For realistic parameters, this model reproduces the key experimental results including thermally induced phase transitions, light-induced spin-state trapping (LIESST), and reverse-LIESST. Notably, we reproduce and explain the experimentally observed relationship between the critical temperature of the thermal transition, T1/2, and the highest temperature for which the trapped state is stable, TLIESST, and explain why increasing the stiffness of the coordination sphere increases TLIESST. We propose strategies to design SCO materials with higher TLIESST: optimizing the spin-orbit coupling via heavier atoms (particularly in the inner coordination sphere) and minimizing the enthalpy difference between the high-spin (HS) and low-spin (LS) states. However, the most dramatic increases arise from increasing the cooperativity of the spin-state transition by increasing the rigidity of the crystal. Increased crystal rigidity can also stabilize the HS state to low temperatures on thermal cycling yet leave the LS state stable at high temperatures following, for example, reverse-LIESST. We show that such highly cooperative systems offer a realistic route to robust room-temperature switching, demonstrate this in silico, and discuss material design rationale to realize this.
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Affiliation(s)
- M Nadeem
- School of Mathematics and Physics, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Jace Cruddas
- School of Physical Sciences, The University of Adelaide, Adelaide, SA 5005, Australia
| | - Gian Ruzzi
- School of Mathematics and Physics, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Benjamin J Powell
- School of Mathematics and Physics, The University of Queensland, Brisbane, Queensland 4072, Australia
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5
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Sarkar R, Loos PF, Boggio-Pasqua M, Jacquemin D. Assessing the Performances of CASPT2 and NEVPT2 for Vertical Excitation Energies. J Chem Theory Comput 2022; 18:2418-2436. [PMID: 35333060 DOI: 10.1021/acs.jctc.1c01197] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Methods able to simultaneously account for both static and dynamic electron correlations have often been employed, not only to model photochemical events but also to provide reference values for vertical transition energies, hence allowing benchmarking of lower-order models. In this category, both the complete-active-space second-order perturbation theory (CASPT2) and the N-electron valence state second-order perturbation theory (NEVPT2) are certainly popular, the latter presenting the advantage of not requiring the application of the empirical ionization-potential-electron-affinity (IPEA) and level shifts. However, the actual accuracy of these multiconfigurational approaches is not settled yet. In this context, to assess the performances of these approaches, the present work relies on highly accurate (±0.03 eV) aug-cc-pVTZ vertical transition energies for 284 excited states of diverse character (174 singlet, 110 triplet, 206 valence, 78 Rydberg, 78 n → π*, 119 π → π*, and 9 double excitations) determined in 35 small- to medium-sized organic molecules containing from three to six non-hydrogen atoms. The CASPT2 calculations are performed with and without IPEA shift and compared to the partially contracted (PC) and strongly contracted (SC) variants of NEVPT2. We find that both CASPT2 with IPEA shift and PC-NEVPT2 provide fairly reliable vertical transition energy estimates, with slight overestimations and mean absolute errors of 0.11 and 0.13 eV, respectively. These values are found to be rather uniform for the various subgroups of transitions. The present work completes our previous benchmarks focused on single-reference wave function methods ( J. Chem. Theory Comput. 2018, 14, 4360; J. Chem. Theory Comput. 2020, 16, 1711), hence allowing for a fair comparison between various families of electronic structure methods. In particular, we show that ADC(2), CCSD, and CASPT2 deliver similar accuracies for excited states with a dominant single-excitation character.
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Affiliation(s)
| | - Pierre-François Loos
- Laboratoire de Chimie et Physique Quantiques, CNRS, UPS, Université de Toulouse, Toulouse 31062, France
| | - Martial Boggio-Pasqua
- Laboratoire de Chimie et Physique Quantiques, CNRS, UPS, Université de Toulouse, Toulouse 31062, France
| | - Denis Jacquemin
- Université de Nantes, CNRS, CEISAM UMR 6230, F-44000 Nantes, France
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6
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Finney BA, Chowdhury SR, Kirkvold C, Vlaisavljevich B. CASPT2 molecular geometries of Fe(II) spin-crossover complexes. Phys Chem Chem Phys 2022; 24:1390-1398. [PMID: 34981806 DOI: 10.1039/d1cp04885f] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Using fully internally contracted (FIC)-CASPT2 analytical gradients, geometry optimizations of spin-crossover complexes are reported. This approach is tested on a series of Fe(II) complexes with different sizes, ranging from 13 to 61 atoms. A combination of active space and basis set choices are employed to investigate their role in determining reliable molecular geometries. The reported strategy demonstrates that a wave function-based level of theory can be used to optimize the geometries of metal complexes in reasonable times and enables one to treat the molecular geometry and electronic structure of the complexes using the same level of theory. For a series of smaller Fe(II) SCO complexes, strong field ligands in the LS state result in geometries with the largest differences between DFT and CASPT2; however, good agreement overall is observed between DFT and CASPT2. For the larger complexes, moderate sized basis sets yield geometries that compare well with DFT and available experimental data. We recommend using the (10e,12o) active space since convergence to a minimum structure was more efficient than with truncated active spaces despite having similar Fe-ligand bond distances.
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Affiliation(s)
- Brian A Finney
- University of South Dakota, Department of Chemistry, 414 E Clark St., Vermillion SD, 57069, USA.
| | - Sabyasachi Roy Chowdhury
- University of South Dakota, Department of Chemistry, 414 E Clark St., Vermillion SD, 57069, USA.
| | - Clara Kirkvold
- University of South Dakota, Department of Chemistry, 414 E Clark St., Vermillion SD, 57069, USA.
| | - Bess Vlaisavljevich
- University of South Dakota, Department of Chemistry, 414 E Clark St., Vermillion SD, 57069, USA.
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7
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Alías-Rodríguez M, Huix-Rotllant M, de Graaf C. Quantum dynamics simulations of the thermal and light-induced high-spin to low-spin relaxation in Fe(bpy)3 and Fe(mtz)6. Faraday Discuss 2022; 237:93-107. [DOI: 10.1039/d2fd00027j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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8
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Heller ER, Richardson JO. Spin Crossover of Thiophosgene via Multidimensional Heavy-Atom Quantum Tunneling. J Am Chem Soc 2021; 143:20952-20961. [PMID: 34846871 DOI: 10.1021/jacs.1c10088] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The spin-crossover reaction of thiophosgene has drawn broad attention from both experimenters and theoreticians as a prime example of radiationless intramolecular decay via intersystem crossing. Despite multiple attempts over 20 years, theoretical predictions have typically been orders of magnitude in error relative to the experimentally measured triplet lifetime. We address the T1 → S0 transition by the first application of semiclassical golden-rule instanton theory in conjunction with on-the-fly electronic-structure calculations based on multireference perturbation theory. Our first-principles approach provides excellent agreement with the experimental rates. This was only possible because instanton theory goes beyond previous methods by locating the optimal tunneling pathway in full dimensionality and thus captures "corner cutting" effects. Since the reaction is situated in the Marcus inverted regime, the tunneling mechanism can be interpreted in terms of two classical trajectories, one traveling forward and one backward in imaginary time, which are connected by particle-antiparticle creation and annihilation events. The calculated mechanism indicates that the spin crossover is sped up by many orders of magnitude due to multidimensional quantum tunneling of the carbon atom even at room temperature.
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Affiliation(s)
- Eric R Heller
- Laboratory of Physical Chemistry, ETH Zürich, 8093 Zürich, Switzerland
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9
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Sánchez-de-Armas R, Montenegro-Pohlhammer N, Develioglu A, Burzurí E, Calzado CJ. Spin-crossover complexes in nanoscale devices: main ingredients of the molecule-substrate interactions. NANOSCALE 2021; 13:18702-18713. [PMID: 34739026 DOI: 10.1039/d1nr04577f] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Spin-crossover complexes embedded in nanodevices experience effects that are absent in the bulk that can modulate, quench and even suppress the spin-transition. In this work we explore, by means of state-of-the-art quantum chemistry calculations, different aspects of the integration of SCO molecules on active nanodevices, such as the geometry and energetics of the interaction with the substrate, extension of the charge transfer between the substrate and SCO molecule, impact of the applied external electric field on the spin-transition, and sensitivity of the transport properties on the local conditions of the substrate. We focus on the recently reported encapsulation of Fe(II) spin-crossover complexes in single-walled carbon nanotubes, with new measurements that support the theoretical findings. Even so our results could be useful to many other systems where SCO phenomena take place at the nanoscale, the spin-state switching is probed by an external electric field or current, or the substrate is responsible for the quenching of the SCO mechanism.
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Affiliation(s)
- Rocío Sánchez-de-Armas
- Departamento de Química Física. U. Sevilla, calle Prof. García González, s/n, 41012 Sevilla, Spain.
| | - Nicolás Montenegro-Pohlhammer
- Departamento de Química Física. U. Sevilla, calle Prof. García González, s/n, 41012 Sevilla, Spain.
- Laboratory of Theoretical Chemistry, Faculty of Chemistry and Biology, University of Santiago de Chile (USACH), 9170022, Santiago, Chile
| | - Aysegul Develioglu
- IMDEA Nanociencia, Campus de Cantoblanco, Calle Faraday 9, 28049 Madrid, Spain.
| | - Enrique Burzurí
- IMDEA Nanociencia, Campus de Cantoblanco, Calle Faraday 9, 28049 Madrid, Spain.
- Departamento de Física de la Materia Condensada, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - Carmen J Calzado
- Departamento de Química Física. U. Sevilla, calle Prof. García González, s/n, 41012 Sevilla, Spain.
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10
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Palomino CM, Sánchez-de-Armas R, Calzado CJ. Theoretical inspection of the spin-crossover [Fe(tzpy) 2(NCS) 2] complex on Au(100) surface. J Chem Phys 2021; 154:034701. [PMID: 33499621 DOI: 10.1063/5.0036612] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We explore the deposition of the spin-crossover [Fe(tzpy)2(NCS)2] complex on the Au(100) surface by means of density functional theory (DFT) based calculations. Two different routes have been employed: low-cost finite cluster-based calculations, where both the Fe complex and the surface are maintained fixed while the molecule approaches the surface; and periodic DFT plane-wave calculations, where the surface is represented by a four-layer slab and both the molecule and surface are relaxed. Our results show that the bridge adsorption site is preferred over the on-top and fourfold hollow ones for both spin states, although they are energetically close. The LS molecule is stabilized by the surface, and the HS-LS energy difference is enhanced by about 15%-25% once deposited. The different Fe ligand field for LS and HS molecules manifests on the composition and energy of the low-lying bands. Our simulated STM images indicate that it is possible to distinguish the spin state of the deposited molecules by tuning the bias voltage of the STM tip. Finally, it should be noted that the use of a reduced size cluster to simulate the Au(100) surface proves to be a low-cost and reliable strategy, providing results in good agreement with those resulting from state-of-the-art periodic calculations for this system.
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Affiliation(s)
- Carlos M Palomino
- Departamento de Química Física, c/Profesor García González, s/n 41012 Sevilla, Spain
| | | | - Carmen J Calzado
- Departamento de Química Física, c/Profesor García González, s/n 41012 Sevilla, Spain
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11
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Montenegro‐Pohlhammer N, Sánchez‐de‐Armas R, Calzado CJ. Deposition of the Spin Crossover Fe
II
–Pyrazolylborate Complex on Au(111) Surface at the Molecular Level. Chemistry 2020; 27:712-723. [DOI: 10.1002/chem.202003520] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Revised: 08/21/2020] [Indexed: 01/01/2023]
Affiliation(s)
| | - Rocío Sánchez‐de‐Armas
- Departamento de Química Física Universidad de Sevilla, c/ Profesor García González, s/n. 41012 Sevilla Spain
| | - Carmen J. Calzado
- Departamento de Química Física Universidad de Sevilla, c/ Profesor García González, s/n. 41012 Sevilla Spain
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12
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The Role of Vibrational Anharmonicity in the Computational Study of Thermal Spin Crossover. MAGNETOCHEMISTRY 2019. [DOI: 10.3390/magnetochemistry5030049] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Spin crossover in transition metal complexes can be studied in great detail with computational chemistry. Over the years, the understanding has grown that the relative stability of high-spin (HS) versus low-spin (LS) states is a subtle balance of many factors that all need to be taken into account for a reliable description. Among the different contributions, the zero-point energy (ZPE) and the entropy play key roles. These quantities are usually calculated assuming a harmonic oscillator model for the molecular vibrations. We investigated the impact of including anharmonic corrections on the ZPE and the entropy and indirectly on the critical temperature of spin crossover. As test systems, we used a set of ten Fe(II) complexes and one Fe(III) complex, covering different coordination modes (mono-, bi-, and tri-dentate ligands), decreasing coordination number upon spin crossover, coordination by second- and third-row atoms, and changes in the oxidation state. The results show that the anharmonicity has a measurable effect, but it is in general rather small, and tendencies are not easily recognized. As a conclusion, we put forward that for high precision results, one should be aware of the anharmonic effects, but as long as computational chemistry is still struggling with other larger factors like the influence of the environment and the accurate determination of the electronic energy difference between HS and LS, the anharmonicity of the vibrational modes is a minor concern.
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13
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Substantiation to structure-property of pyrazine-based compounds by undeniable impress of its different connectivities. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2019.03.087] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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14
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Francés‐Monerris A, Gros PC, Assfeld X, Monari A, Pastore M. Toward Luminescent Iron Complexes: Unravelling the Photophysics by Computing Potential Energy Surfaces. CHEMPHOTOCHEM 2019. [DOI: 10.1002/cptc.201900100] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Antonio Francés‐Monerris
- Laboratoire de Physique et Chimie Théoriques (LPCT)Université de Lorraine, CNRS 54000 Nancy France
| | - Philippe C. Gros
- Laboratoire Lorrain de Chimie Moléculaire (L2CM)Université de Lorraine, CNRS 54000 Nancy France
| | - Xavier Assfeld
- Laboratoire de Physique et Chimie Théoriques (LPCT)Université de Lorraine, CNRS 54000 Nancy France
| | - Antonio Monari
- Laboratoire de Physique et Chimie Théoriques (LPCT)Université de Lorraine, CNRS 54000 Nancy France
| | - Mariachiara Pastore
- Laboratoire de Physique et Chimie Théoriques (LPCT)Université de Lorraine, CNRS 54000 Nancy France
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15
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Ulusoy IS, Wilson AK. Spin trapping and flipping in FeCO through relativistic electron dynamics. Phys Chem Chem Phys 2019; 21:7265-7271. [PMID: 30607408 DOI: 10.1039/c8cp06583g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Transition metal compounds are very versatile, and their characteristics can differ profoundly depending on their electronic structure. Compounds in which a spin transition from a low-spin to a high-spin state can be achieved through means of an optical excitation are particularly intriguing, as a controlled spin-flip opens promising avenues in areas such as sensing, information technology, molecular switches and energy technology. The fundamental mechanisms in spin crossover and spin transitions remain unanswered, due to the complexity of electronic structure and interplay of relativistic effects. Presented here is a new approach that allows the first direct study of spin flip dynamics through a mapping of spin-mixed to spin-pure states. The method is applied to FeCO and addresses the spin-flip dynamics during a spin transition. Wave packets that combine different spin states are generated through optical excitation and relevant mechanisms in optically triggered spin transitions are discussed.
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Affiliation(s)
- Inga S Ulusoy
- Department of Chemistry, Michigan State University, 578 S Shaw Lane, East Lansing, MI 48824-1322, USA.
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16
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Sousa C, Alías M, Domingo A, de Graaf C. Deactivation of Excited States in Transition-Metal Complexes: Insight from Computational Chemistry. Chemistry 2018; 25:1152-1164. [DOI: 10.1002/chem.201801990] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2018] [Indexed: 11/11/2022]
Affiliation(s)
- Carmen Sousa
- Departament de Química Física and Institut de Química, Teòrica i Computacional; Universitat de Barcelona; C/ Martí i Franquès 1 08028 Barcelona Catalunya Spain
| | - Marc Alías
- Departament de Química Física i Inorgànica; Universitat Rovira i Virgili; Marcel⋅lí Domingo 1 43007 Tarragona Catalunya Spain
| | - Alex Domingo
- Departament de Química Física i Inorgànica; Universitat Rovira i Virgili; Marcel⋅lí Domingo 1 43007 Tarragona Catalunya Spain
| | - Coen de Graaf
- Departament de Química Física i Inorgànica; Universitat Rovira i Virgili; Marcel⋅lí Domingo 1 43007 Tarragona Catalunya Spain
- ICREA; Pg. Lluis Companys 23 08010 Barcelona Catalunya Spain
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17
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Vela S, Verot M, Fromager E, Robert V. Electron transport through a spin crossover junction. Perspectives from a wavefunction-based approach. J Chem Phys 2018; 146:064112. [PMID: 28201891 DOI: 10.1063/1.4975327] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
The present paper reports the application of a computational framework, based on the quantum master equation, the Fermi's golden Rule, and conventional wavefunction-based methods, to describe electron transport through a spin crossover molecular junction (Fe(bapbpy) (NCS)2, 1, bapbpy = N-(6-(6-(Pyridin-2-ylamino)pyridin-2-yl)pyridin-2-yl)-pyridin-2-amine). This scheme is an alternative to the standard approaches based on the relative position and nature of the frontier orbitals, as it evaluates the junction's Green's function by means of accurate state energies and wavefunctions. In the present work, those elements are calculated for the relevant states of the high- and low-spin species of 1, and they are used to evaluate the output conductance within a given range of bias- and gate-voltages. The contribution of the ground and low-lying excited states to the current is analyzed, and inspected in terms of their 2S + 1 Ms-states. In doing so, it is shown the relevance of treating not only the ground state in its maximum-Ms projection, as usually done in most computational-chemistry packages, but the whole spectrum of low-energy states of the molecule. Such improved representation of the junction has a notable impact on the total conductivity and, more importantly, it restores the equivalence between alpha and beta transport, which means that no spin polarization is observed in the absence of Zeeman splitting. Finally, this work inspects the strong- and weak-points of the suggested theoretical framework to understand electron transport through molecular switchable materials, identifies a pathway for future improvement, and offers a new insight into concepts that play a key role in spintronics.
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Affiliation(s)
- Sergi Vela
- Laboratoire de Chimie Quantique, UMR 7177, CNRS-Université de Strasbourg, 4 rue Blaise Pascal, F-67000 Strasbourg, France
| | - Martin Verot
- Laboratoire de Chimie, École Normale Supérieure de Lyon, CNRS, 46 allée d'Italie, F-69364 Lyon, France
| | - Emmanuel Fromager
- Laboratoire de Chimie Quantique, UMR 7177, CNRS-Université de Strasbourg, 4 rue Blaise Pascal, F-67000 Strasbourg, France
| | - Vincent Robert
- Laboratoire de Chimie Quantique, UMR 7177, CNRS-Université de Strasbourg, 4 rue Blaise Pascal, F-67000 Strasbourg, France
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18
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Sousa C, de Graaf C, Rudavskyi A, Broer R. Theoretical Study of the Light-Induced Spin Crossover Mechanism in [Fe(mtz)6]2+ and [Fe(phen)3]2+. J Phys Chem A 2017; 121:9720-9727. [DOI: 10.1021/acs.jpca.7b10687] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Carmen Sousa
- Departament
de Ciència de Materials i Química Física and
Institut de Química Teòrica i Computacional, Universitat de Barcelona, C/Martí i Franquès 1, 08028 Barcelona, Catalunya, Spain
| | - Coen de Graaf
- ICREA, Pg. Lluís Companys 23, 08010 Barcelona, Catalunya, Spain
- Departament
de Química Física i Inorgànica, Universitat Rovira i Virgili, Marcel·lí Domingo s/n, 43007 Tarragona, Catalunya, Spain
- Zernike
Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Andrii Rudavskyi
- Zernike
Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Ria Broer
- Zernike
Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
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19
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Design and Control of Cooperativity in Spin-Crossover in Metal–Organic Complexes: A Theoretical Overview. INORGANICS 2017. [DOI: 10.3390/inorganics5030047] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
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20
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Ashley DC, Jakubikova E. Ironing out the photochemical and spin-crossover behavior of Fe(II) coordination compounds with computational chemistry. Coord Chem Rev 2017. [DOI: 10.1016/j.ccr.2017.02.005] [Citation(s) in RCA: 65] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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21
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Fumanal M, Wagner LK, Sanvito S, Droghetti A. Diffusion Monte Carlo Perspective on the Spin-State Energetics of [Fe(NCH)6](2.). J Chem Theory Comput 2016; 12:4233-41. [PMID: 27500854 DOI: 10.1021/acs.jctc.6b00332] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The energy difference between the high spin and the low spin state of the model compound [Fe(NCH)6](2+) is investigated by means of Diffusion Monte Carlo (DMC), where special attention is dedicated to analyzing the effect of the fix node approximation on the accuracy of the results. For this purpose, we compare several Slater-Jastrow and multireference Slater-Jastrow trial wave functions. We found that a Slater-Jastrow trial wave function constructed with the generalized Kohn-Sham orbitals from hybrid DFT represents the optimal choice. This is understood by observing that hybrid functionals account for the subtle balance between exchange and correlation effects and the respective orbitals accurately describe the ligand-metal hybridization as well as the charge reorganization accompanying the spin transition. Finally the DMC results are compared with those obtained by Hartree-Fock, DFT, CASSCF, and CASPT2. While there is no clear reference value for the high spin-low spin energy difference, DMC and high level CCSD(T) calculations agree within around 0.3 eV.
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Affiliation(s)
- Maria Fumanal
- Institut de Chimie UMR7177 CNRS-Université de Strasbourg , 1 Rue Blaise Pascal BP 296/R8, F-67007 Strasbourg, France.,Departament de Química Física and IQTCUB, Facultat de Química, Universitat de Barcelona , Av. Diagonal 645, 08028 Barcelona, Spain
| | - Lucas K Wagner
- Department of Physics, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
| | - Stefano Sanvito
- School of Physics, AMBER and CRANN Institute, Trinity College , Dublin 2, Ireland
| | - Andrea Droghetti
- School of Physics, AMBER and CRANN Institute, Trinity College , Dublin 2, Ireland.,Nano-Bio Spectroscopy Group and European Theoretical Spectroscopy Facility (ETSF), Universidad del Pais Vasco CFM CSIC-UPV/EHU-MPC and DIPC , Av.Tolosa 72, 20018 San Sebastian, Spain
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22
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Saureu S, de Graaf C. TD-DFT study of the light-induced spin crossover of Fe(iii) complexes. Phys Chem Chem Phys 2016; 18:1233-44. [DOI: 10.1039/c5cp06620d] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Two light-induced spin-crossover Fe(iii) compounds have been studied with time-dependent density functional theory (TD-DFT) to investigate the deactivation mechanism and the role of the ligand-field states as intermediates in this process.
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Affiliation(s)
- Sergi Saureu
- Departament de Química Física i Inorgànica
- Universitat Rovira i Virgili
- 43007 Tarragona
- Spain
| | - Coen de Graaf
- Departament de Química Física i Inorgànica
- Universitat Rovira i Virgili
- 43007 Tarragona
- Spain
- Institució Catalana de Recerca i Estudis Avançats (ICREA)
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23
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Iuchi S, Koga N. Insight into the light-induced spin crossover of [Fe(bpy)3]2+ in aqueous solution from molecular dynamics simulation of d–d excited states. Phys Chem Chem Phys 2016; 18:4789-99. [DOI: 10.1039/c5cp06406f] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Lifetimes of triplet d–d states were evaluated through molecular dynamics simulations to gain insight into relaxation dynamics of aqueous [Fe(bpy)3]2+.
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Affiliation(s)
- Satoru Iuchi
- Graduate School of Information Science
- Nagoya University
- Nagoya 464-8601
- Japan
| | - Nobuaki Koga
- Graduate School of Information Science
- Nagoya University
- Nagoya 464-8601
- Japan
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24
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Vela S, Fumanal M, Ribas-Ariño J, Robert V. On the zeroth-order hamiltonian for CASPT2 calculations of spin crossover compounds. J Comput Chem 2015; 37:947-53. [DOI: 10.1002/jcc.24283] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2015] [Revised: 11/25/2015] [Accepted: 11/26/2015] [Indexed: 11/08/2022]
Affiliation(s)
- Sergi Vela
- Laboratoire de Chimie Quantique; UMR 7177, Université de Strasbourg; 4 rue Blaise Pascal F-67000 Strasbourg France
- Departament de Química Física and IQTCUB; Universitat de Barcelona; Av. Diagonal 645 08028, Barcelona Spain
| | - Maria Fumanal
- Departament de Química Física and IQTCUB; Universitat de Barcelona; Av. Diagonal 645 08028, Barcelona Spain
| | - Jordi Ribas-Ariño
- Departament de Química Física and IQTCUB; Universitat de Barcelona; Av. Diagonal 645 08028, Barcelona Spain
| | - Vincent Robert
- Laboratoire de Chimie Quantique; UMR 7177, Université de Strasbourg; 4 rue Blaise Pascal F-67000 Strasbourg France
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25
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Nance J, Bowman DN, Mukherjee S, Kelley CT, Jakubikova E. Insights into the Spin-State Transitions in [Fe(tpy)2]2+: Importance of the Terpyridine Rocking Motion. Inorg Chem 2015; 54:11259-68. [DOI: 10.1021/acs.inorgchem.5b01747] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- James Nance
- Department of Mathematics and ‡Department of
Chemistry, North Carolina State University (NCSU), Raleigh, North Carolina 27695, United States
| | - David N. Bowman
- Department of Mathematics and ‡Department of
Chemistry, North Carolina State University (NCSU), Raleigh, North Carolina 27695, United States
| | - Sriparna Mukherjee
- Department of Mathematics and ‡Department of
Chemistry, North Carolina State University (NCSU), Raleigh, North Carolina 27695, United States
| | - C. T. Kelley
- Department of Mathematics and ‡Department of
Chemistry, North Carolina State University (NCSU), Raleigh, North Carolina 27695, United States
| | - Elena Jakubikova
- Department of Mathematics and ‡Department of
Chemistry, North Carolina State University (NCSU), Raleigh, North Carolina 27695, United States
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26
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Alcover-Fortuny G, de Graaf C, Caballol R. Spin-crossover in phenylazopyridine-functionalized Ni–porphyrin: trans–cis isomerization triggered by π–π interactions. Phys Chem Chem Phys 2015; 17:217-25. [DOI: 10.1039/c4cp04402a] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
To elucidate the light-induced spin-crossover mechanism of the PAPy-functionalized Ni(ii)–porphyrin, a DFT/CASSCF/CASPT2 study has been performed to determine the most stable cis and trans conformers and to characterize the excitation that triggers the process.
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Affiliation(s)
- Gerard Alcover-Fortuny
- Departament de Química Física i Inorgànica
- Universitat Rovira i Virgili
- 43007 Tarragona
- Spain
| | - Coen de Graaf
- Departament de Química Física i Inorgànica
- Universitat Rovira i Virgili
- 43007 Tarragona
- Spain
- Institució Catalana de Recerca i Estudis Avançats (ICREA)
| | - Rosa Caballol
- Departament de Química Física i Inorgànica
- Universitat Rovira i Virgili
- 43007 Tarragona
- Spain
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27
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Vela S, Fumanal M, Ribas-Arino J, Robert V. Towards an accurate and computationally-efficient modelling of Fe(ii)-based spin crossover materials. Phys Chem Chem Phys 2015; 17:16306-14. [DOI: 10.1039/c5cp02502h] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
A theoretical approach is proposed to accurately calculate the LS–HS energy gap of SCO complexes in the solid state.
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Affiliation(s)
- Sergi Vela
- Laboratoire de Chimie Quantique
- Université de Strasbourg
- F-67000 Strasbourg
- France
- Departament de Química Física and IQTCUB
| | - Maria Fumanal
- Departament de Química Física and IQTCUB
- Universitat de Barcelona
- Barcelona
- Spain
| | - Jordi Ribas-Arino
- Departament de Química Física and IQTCUB
- Universitat de Barcelona
- Barcelona
- Spain
| | - Vincent Robert
- Laboratoire de Chimie Quantique
- Université de Strasbourg
- F-67000 Strasbourg
- France
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28
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Vela S, Novoa JJ, Ribas-Arino J. Insights into the crystal-packing effects on the spin crossover of [FeII(1-bpp)]2+-based materials. Phys Chem Chem Phys 2014; 16:27012-24. [DOI: 10.1039/c4cp03971h] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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29
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Rudavskyi A, Sousa C, de Graaf C, Havenith RWA, Broer R. Computational approach to the study of thermal spin crossover phenomena. J Chem Phys 2014; 140:184318. [DOI: 10.1063/1.4875695] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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30
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Marino A, Chakraborty P, Servol M, Lorenc M, Collet E, Hauser A. Die Rolle der Ligandenfeldzustände im ultraschnellen photophysikalischen Zyklus der Eisen(II)-Spinübergangsverbindung [Fe(ptz)6](BF4)2. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201310884] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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31
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Marino A, Chakraborty P, Servol M, Lorenc M, Collet E, Hauser A. The Role of Ligand-Field States in the Ultrafast Photophysical Cycle of the Prototypical Iron(II) Spin-Crossover Compound [Fe(ptz)6](BF4)2. Angew Chem Int Ed Engl 2014; 53:3863-7. [DOI: 10.1002/anie.201310884] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2013] [Indexed: 11/11/2022]
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32
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In-situ Characterization of Molecular Processes in Liquids by Ultrafast X-ray Absorption Spectroscopy. IN-SITU MATERIALS CHARACTERIZATION 2014. [DOI: 10.1007/978-3-642-45152-2_1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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33
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Saureu S, de Graaf C. On the role of solvent effects on the electronic transitions in Fe(II) and Ru(II) complexes. Chem Phys 2014. [DOI: 10.1016/j.chemphys.2013.11.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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34
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Hua W, Tian G, Fronzoni G, Li X, Stener M, Luo Y. Fe L-Edge X-ray Absorption Spectra of Fe(II) Polypyridyl Spin Crossover Complexes from Time-Dependent Density Functional Theory. J Phys Chem A 2013; 117:14075-85. [DOI: 10.1021/jp408776p] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Weijie Hua
- Department
of Theoretical Chemistry and Biology, School of Biotechnology, Royal Institute of Technology, S-106 91 Stockholm, Sweden
| | - Guangjun Tian
- Department
of Theoretical Chemistry and Biology, School of Biotechnology, Royal Institute of Technology, S-106 91 Stockholm, Sweden
| | - Giovanna Fronzoni
- Dipartimento
di Scienze Chimiche e Farmaceutiche, Università di Trieste, Via L. Giorgieri
1, I-34127 Trieste, Italy
| | - Xin Li
- Department
of Theoretical Chemistry and Biology, School of Biotechnology, Royal Institute of Technology, S-106 91 Stockholm, Sweden
| | - Mauro Stener
- Dipartimento
di Scienze Chimiche e Farmaceutiche, Università di Trieste, Via L. Giorgieri
1, I-34127 Trieste, Italy
| | - Yi Luo
- Department
of Theoretical Chemistry and Biology, School of Biotechnology, Royal Institute of Technology, S-106 91 Stockholm, Sweden
- National Synchrotron
Radiation Laboratory and Hefei National Laboratory for Physical Sciences
at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026, People’s Republic of China
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35
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Sousa C, de Graaf C, Rudavskyi A, Broer R, Tatchen J, Etinski M, Marian CM. Ultrafast Deactivation Mechanism of the Excited Singlet in the Light‐Induced Spin Crossover of [Fe(2,2′‐bipyridine)
3
]
2+. Chemistry 2013; 19:17541-51. [DOI: 10.1002/chem.201302992] [Citation(s) in RCA: 126] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2013] [Indexed: 11/09/2022]
Affiliation(s)
- Carmen Sousa
- Departament de Química Física and Institut de Química, Teòrica i Computacional, Universitat de Barcelona, C/Martí i Franquès 1, 08028 Barcelona (Spain)
| | - Coen de Graaf
- Departament de Química Física i Inorgànica, Universitat Rovira i Virgili, Marcel‐lí Domingo s/n, 43007 Tarragona (Spain), Fax: (+34)‐977559563
- Institució Catalana de Recerca i Estudis Avançats (ICREA), Passeig Lluís Companys 23, 08010 Barcelona (Spain)
- Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen (The Netherlands)
| | - Andrii Rudavskyi
- Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen (The Netherlands)
| | - Ria Broer
- Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen (The Netherlands)
| | - Jörg Tatchen
- Institute of Theoretical and Computational Chemistry, Heinrich‐Heine University Düsseldorf, Universitätsstrasse 1, 40225 Düsseldorf (Germany)
| | - Mihajlo Etinski
- Faculty of Physical Chemistry, University of Belgrade, Studentski Trg 12–16, 11158 Belgrade (Serbia)
| | - Christel M. Marian
- Institute of Theoretical and Computational Chemistry, Heinrich‐Heine University Düsseldorf, Universitätsstrasse 1, 40225 Düsseldorf (Germany)
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36
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Malrieu JP, Caballol R, Calzado CJ, de Graaf C, Guihéry N. Magnetic interactions in molecules and highly correlated materials: physical content, analytical derivation, and rigorous extraction of magnetic Hamiltonians. Chem Rev 2013; 114:429-92. [PMID: 24102410 DOI: 10.1021/cr300500z] [Citation(s) in RCA: 282] [Impact Index Per Article: 25.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Jean Paul Malrieu
- Laboratoire de Chimie et Physique Quantiques, Université de Toulouse 3 , 118 route de Narbonne, 31062 Toulouse, France
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37
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Hassan N, Stelzl J, Weinberger P, Molnar G, Bousseksou A, Kubel F, Mereiter K, Boca R, Linert W. Spectroscopic, structural and magnetic investigations of iron(II) complexes based on 1-isopropyl- and 1-isobutyl-substituted tetrazole ligands. Inorganica Chim Acta 2013; 396:92-100. [PMID: 23564970 PMCID: PMC3616971 DOI: 10.1016/j.ica.2012.10.007] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2012] [Revised: 10/12/2012] [Accepted: 10/17/2012] [Indexed: 12/04/2022]
Abstract
Two partly new [Fe(intz)6](BF4)2 complexes with n = 3 and 4 (i3tz = 1-isopropyl-1H-tetrazole, i4tz = 1-isobutyl-1H-tetrazole) were synthesized and characterised by X-ray powder diffraction, magnetic susceptibility measurements, vibrational, electronic and 57Fe-Mößbauer spectroscopy as well as DSC. The [Fe(i3tz)6](BF4)2 complex was re-investigated and shows an incomplete spin transition at Tc ∼ 109 K, while the [Fe(i4tz)6](BF4)2 features a complete but rather gradual spin transition with T½ = 223 K. In the lack of suitable crystals of [Fe(intz)6](BF4)2 with n = 3 and 4, we synthesized crystals of [Ni(intz)6](BF4)2 with n = 3 and 4, determined their X-ray crystal structures, and proved them to be homeotypic with the respective Fe-complexes by X-ray powder diffraction. DSC measurements showed an endothermic peak for the [Fe(i3tz)6](BF4)2 around T = 260 K not corresponding to a spin transition and suggesting a structural phase transition at this temperature. A well-developed peak at Tp = 225 K matches the spin-transition temperature T½ = 223 K for [Fe(i4tz)6](BF4)2.
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Affiliation(s)
- Nader Hassan
- Institute of Applied Synthetic Chemistry, Vienna University of Technology, Getreidemarkt 9/163-AC, A-1060 Vienna, Austria
| | - Julia Stelzl
- Institute of Applied Synthetic Chemistry, Vienna University of Technology, Getreidemarkt 9/163-AC, A-1060 Vienna, Austria
| | - Peter Weinberger
- Institute of Applied Synthetic Chemistry, Vienna University of Technology, Getreidemarkt 9/163-AC, A-1060 Vienna, Austria
| | - Gabor Molnar
- Laboratoire de Chimie de Coordination, LCC-CNRS UPR8241, 205 Route de Narbonne, F-31077 Toulouse, France
| | - Azzedine Bousseksou
- Laboratoire de Chimie de Coordination, LCC-CNRS UPR8241, 205 Route de Narbonne, F-31077 Toulouse, France
| | - Frank Kubel
- Institute for Chemical Technologies and Analytics, Vienna University of Technology, Getreidemarkt 9/164-SC, A-1060 Vienna, Austria
| | - Kurt Mereiter
- Institute for Chemical Technologies and Analytics, Vienna University of Technology, Getreidemarkt 9/164-SC, A-1060 Vienna, Austria
| | - Roman Boca
- Institute of Inorganic Chemistry, Technology and Materials (FCHPT), Slovak University of Technology, SK 812 37 Bratislava, Slovakia
| | - Wolfgang Linert
- Institute of Applied Synthetic Chemistry, Vienna University of Technology, Getreidemarkt 9/163-AC, A-1060 Vienna, Austria
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38
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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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39
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Lemke HT, Bressler C, Chen LX, Fritz DM, Gaffney KJ, Galler A, Gawelda W, Haldrup K, Hartsock RW, Ihee H, Kim J, Kim KH, Lee JH, Nielsen MM, Stickrath AB, Zhang W, Zhu D, Cammarata M. Femtosecond X-ray Absorption Spectroscopy at a Hard X-ray Free Electron Laser: Application to Spin Crossover Dynamics. J Phys Chem A 2013; 117:735-40. [DOI: 10.1021/jp312559h] [Citation(s) in RCA: 171] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Henrik T. Lemke
- LCLS, SLAC National Laboratory, Menlo Park, California 94025, United States
| | | | - Lin X. Chen
- Chemical Sciences
and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - David M. Fritz
- LCLS, SLAC National Laboratory, Menlo Park, California 94025, United States
| | - Kelly J. Gaffney
- Pulse
Institute, SLAC National Laboratory, Menlo
Park, California 94025,
United States
| | - Andreas Galler
- European XFEL, Albert-Einstein-Ring 19, 22761 Hamburg, Germany
| | | | - Kristoffer Haldrup
- Centre for Molecular
Movies, Department of Physics, NEXMAP Section, Technical University of Denmark, 2800 Kgs. Lyngby,
Denmark
| | - Robert W. Hartsock
- Pulse
Institute, SLAC National Laboratory, Menlo
Park, California 94025,
United States
| | - Hyotcherl Ihee
- Center for Nanomaterials
and Chemical
Reactions, Institute for Basic Science,
Daejeon 305-701, Republic of Korea
- Center for Time-Resolved
Diffraction, Department of Chemistry, KAIST, Daejeon 305-701, Republic of Korea
| | - Jeongho Kim
- Department of Chemistry, Inha University, Incheon 402-751, Republic
of Korea
| | - Kyung Hwan Kim
- Center for Nanomaterials
and Chemical
Reactions, Institute for Basic Science,
Daejeon 305-701, Republic of Korea
- Center for Time-Resolved
Diffraction, Department of Chemistry, KAIST, Daejeon 305-701, Republic of Korea
| | - Jae Hyuk Lee
- Center for Time-Resolved
Diffraction, Department of Chemistry, KAIST, Daejeon 305-701, Republic of Korea
| | - Martin M. Nielsen
- Centre for Molecular
Movies, Department of Physics, NEXMAP Section, Technical University of Denmark, 2800 Kgs. Lyngby,
Denmark
| | - Andrew B. Stickrath
- Chemical Sciences
and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Wenkai Zhang
- Pulse
Institute, SLAC National Laboratory, Menlo
Park, California 94025,
United States
| | - Diling Zhu
- LCLS, SLAC National Laboratory, Menlo Park, California 94025, United States
| | - Marco Cammarata
- LCLS, SLAC National Laboratory, Menlo Park, California 94025, United States
- Institut de Physique de Rennes,
UMR UR1-CNRS 6251, Université de Rennes 1, F35042, Rennes, France
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Chattopadhyaya M, Alam MM, Chakrabarti S. Chemical control of a molecular spin switch in the presence of a gate. RSC Adv 2013. [DOI: 10.1039/c3ra43902j] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
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41
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Rudavskyi A, Havenith RWA, Broer R, de Graaf C, Sousa C. Explanation of the site-specific spin crossover in Fe(mtz)6(BF4)2. Dalton Trans 2013; 42:14702-9. [DOI: 10.1039/c3dt52027g] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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Pápai M, Vankó G, de Graaf C, Rozgonyi T. Theoretical Investigation of the Electronic Structure of Fe(II) Complexes at Spin-State Transitions. J Chem Theory Comput 2012; 9:509-519. [PMID: 25821416 PMCID: PMC4358629 DOI: 10.1021/ct300932n] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2012] [Indexed: 01/30/2023]
Abstract
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The electronic structure relevant to low spin (LS)↔high
spin (HS) transitions in Fe(II) coordination compounds with a FeN6 core are studied. The selected [Fe(tz)6]2+ (1) (tz = 1H-tetrazole), [Fe(bipy)3]2+ (2) (bipy = 2,2′-bipyridine), and [Fe(terpy)2]2+ (3) (terpy = 2,2′:6′,2″-terpyridine)
complexes have been actively studied experimentally, and with their
respective mono-, bi-, and tridentate ligands, they constitute a comprehensive
set for theoretical case studies. The methods in this work include
density functional theory (DFT), time-dependent DFT (TD-DFT), and
multiconfigurational second order perturbation theory (CASPT2). We
determine the structural parameters as well as the energy splitting
of the LS–HS states (ΔEHL) applying the above methods and comparing their performance. We
also determine the potential energy curves representing the ground
and low-energy excited singlet, triplet, and quintet d6 states along the mode(s) that connect the LS and HS states. The
results indicate that while DFT is well suited for the prediction
of structural parameters, an accurate multiconfigurational approach
is essential for the quantitative determination of ΔEHL. In addition, a good qualitative agreement
is found between the TD-DFT and CASPT2 potential energy curves. Although
the TD-DFT results might differ in some respect (in our case, we found
a discrepancy at the triplet states), our results suggest that this
approach, with due care, is very promising as an alternative for the
very expensive CASPT2 method. Finally, the two-dimensional (2D) potential
energy surfaces above the plane spanned by the two relevant configuration
coordinates in [Fe(terpy)2]2+ were computed
at both the DFT and CASPT2 levels. These 2D surfaces indicate that
the singlet–triplet and triplet–quintet states are separated
along different coordinates, i.e., different vibration modes. Our
results confirm that in contrast to the case of complexes with mono-
and bidentate ligands, the singlet–quintet transitions in [Fe(terpy)2]2+ cannot be described using a single configuration
coordinate.
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Affiliation(s)
- Mátyás Pápai
- Wigner Research Centre for Physics, Hungarian Academy of Sciences, H-1525 Budapest, P.O. Box 49, Hungary
| | - György Vankó
- Wigner Research Centre for Physics, Hungarian Academy of Sciences, H-1525 Budapest, P.O. Box 49, Hungary
| | - Coen de Graaf
- Departament de Química Física i Inorgànica, Universitat Rovira i Virgili, Marcel·lí Domingo s/n, 43007 Tarragona, Spain ; Institució Catalana de Recerca i Estudis Avançats (ICREA), Passeig Lluís Companys 23, 08010, Barcelona, Spain
| | - Tamás Rozgonyi
- Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences, Hungarian Academy of Sciences, H-1025 Budapest, Pusztaszeri út 59-67, Hungary
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43
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Krah T, Suaud N, Zanchet A, Robert V, Ben Amor N. Vacancy‐Induced Deformation in a CoFe Prussian Blue Analogue – A Theoretical Investigation. Eur J Inorg Chem 2012. [DOI: 10.1002/ejic.201200857] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Tim Krah
- Laboratoire de Chimie Quantique, Institut de Chimie UMR 7177, Université de Strasbourg, 1 Rue Blaise Pascal, 67000 Strasbourg, France
| | - Nicolas Suaud
- Laboratoire de Chimie et Physique Quantiques, Université de Toulouse, UPS, IRSAMC, 118 route de Narbonne, 31062 Toulouse, France
| | - Alexandre Zanchet
- Instituto de Física Fundamental, C.S.I.C., Serrano 123, 28006 Madrid, Spain
| | - Vincent Robert
- Laboratoire de Chimie Quantique, Institut de Chimie UMR 7177, Université de Strasbourg, 1 Rue Blaise Pascal, 67000 Strasbourg, France
| | - Nadia Ben Amor
- Laboratoire de Chimie et Physique Quantiques, CNRS, UPS, IRSAMC, 118 route de Narbonne, 31062 Toulouse, France
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Metal-to-metal charge-transfer transitions: reliable excitation energies from ab initio calculations. Theor Chem Acc 2012. [DOI: 10.1007/s00214-012-1264-1] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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46
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Ando H, Iuchi S, Sato H. Theoretical study on ultrafast intersystem crossing of chromium(III) acetylacetonate. Chem Phys Lett 2012. [DOI: 10.1016/j.cplett.2012.03.043] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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47
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Iuchi S. A model electronic Hamiltonian to study low-lying electronic states of [Fe(bpy)3]2+ in aqueous solution. J Chem Phys 2012; 136:064519. [DOI: 10.1063/1.3684239] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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48
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49
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Spin-orbit coupling and intersystem crossing in molecules. WILEY INTERDISCIPLINARY REVIEWS-COMPUTATIONAL MOLECULAR SCIENCE 2011. [DOI: 10.1002/wcms.83] [Citation(s) in RCA: 412] [Impact Index Per Article: 31.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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50
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Bousseksou A, Molnár G, Salmon L, Nicolazzi W. Molecular spin crossover phenomenon: recent achievements and prospects. Chem Soc Rev 2011; 40:3313-35. [PMID: 21544283 DOI: 10.1039/c1cs15042a] [Citation(s) in RCA: 904] [Impact Index Per Article: 69.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Recently we assisted a strong renewed interest in the fascinating field of molecular spin crossover complexes by (1) the emergence of nanosized spin crossover materials through direct synthesis of coordination nanoparticles and nanopatterned thin films as well as by (2) the use of novel sophisticated high spatial and temporal resolution experimental techniques and theoretical approaches for the study of spatiotemporal phenomena in cooperative spin crossover systems. Besides generating new fundamental knowledge on size-reduction effects and the dynamics of the spin crossover phenomenon, this research aims also at the development of practical applications such as sensor, display, information storage and nanophotonic devices. In this critical review, we discuss recent work in the field of molecule-based spin crossover materials with a special focus on these emerging issues, including chemical synthesis, physical properties and theoretical aspects as well (223 references).
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Affiliation(s)
- Azzedine Bousseksou
- Laboratoire de Chimie de Coordination, CNRS UPR-8241 and Université de Toulouse, UPS, INP, F-31077 Toulouse, France.
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