51
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Zolnhofer EM, Wijeratne GB, Jackson TA, Fortier S, Heinemann FW, Meyer K, Krzystek J, Ozarowski A, Mindiola DJ, Telser J. Electronic Structure and Magnetic Properties of a Titanium(II) Coordination Complex. Inorg Chem 2020; 59:6187-6201. [PMID: 32279487 DOI: 10.1021/acs.inorgchem.0c00311] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Stable coordination complexes of TiII (3d2) are relatively uncommon, but are of interest as synthons for low oxidation state titanium complexes for application as potential catalysts and reagents for organic synthesis. Specifically, high-spin TiII ions supported by redox-inactive ligands are still quite rare due to the reducing power of this soft ion. Among such TiII complexes is trans-[TiCl2(tmeda)2], where tmeda = N,N,N',N'-tetramethylethane-1,2-diamine. This complex was first reported by Gambarotta and co-workers almost 30 years ago, but it was not spectroscopically characterized and theoretical investigation by quantum chemical theory (QCT) was not feasible at that time. As part of our interest in low oxidation state early transition metal complexes, we have revisited this complex and report a modified synthesis and a low temperature (100 K) crystal structure that differs slightly from that originally reported at ambient temperature. We have used magnetometry, high-frequency and -field EPR (HFEPR), and variable-temperature variable-field magnetic circular dichroism (VTVH-MCD) spectroscopies to characterize trans-[TiCl2(tmeda)2]. These techniques yield the following S = 1 spin Hamiltonian parameters for the complex: D = -5.23(1) cm-1, E = -0.88(1) cm-1, (E/D = 0.17), g = [1.86(1), 1.94(2), 1.77(1)]. This information, in combination with electronic transitions from MCD, was used as input for both classical ligand-field theory (LFT) and detailed QCT studies, the latter including both density functional theory (DFT) and ab initio methods. These computational methods are seldom applied to paramagnetic early transition metal complexes, particularly those with S > 1/2. Our studies provide a complete picture of the electronic structure of this complex that can be put into context with the few other high-spin and mononuclear TiII species characterized to date.
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Affiliation(s)
- Eva M Zolnhofer
- Department of Chemistry and Pharmacy, Inorganic Chemistry, Friedrich-Alexander University Erlangen-Nürnberg (FAU), 91058 Erlangen, Germany
| | - Gayan B Wijeratne
- Department of Chemistry, University of Kansas, 1567 Irving Hill Road, Lawrence, Kansas 66045, United States
| | - Timothy A Jackson
- Department of Chemistry, University of Kansas, 1567 Irving Hill Road, Lawrence, Kansas 66045, United States
| | - Skye Fortier
- Department of Chemistry and Molecular Structure Center, Indiana University, Bloomington, Indiana 47405, United States
| | - Frank W Heinemann
- Department of Chemistry and Pharmacy, Inorganic Chemistry, Friedrich-Alexander University Erlangen-Nürnberg (FAU), 91058 Erlangen, Germany
| | - Karsten Meyer
- Department of Chemistry and Pharmacy, Inorganic Chemistry, Friedrich-Alexander University Erlangen-Nürnberg (FAU), 91058 Erlangen, Germany
| | - J Krzystek
- National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32310, United States
| | - Andrew Ozarowski
- National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32310, United States
| | - Daniel J Mindiola
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Joshua Telser
- Department of Biological, Physical and Health Sciences, Roosevelt University, Chicago, Illinois 60605, United States
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52
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Zhang YJ, Yin L, Li J, Hu ZB, Ouyang ZW, Song Y, Wang Z. Synthesis, crystal structures, HF-EPR, and magnetic properties of six-coordinate transition metal (Co, Ni, and Cu) compounds with a 4-amino-1,2,4-triazole Schiff-base ligand. RSC Adv 2020; 10:12833-12840. [PMID: 35492139 PMCID: PMC9051221 DOI: 10.1039/c9ra10851c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2019] [Accepted: 03/10/2020] [Indexed: 12/15/2022] Open
Abstract
We have synthesized a series of transition metal compounds [M(L)2(H2O)2] (M = Co (1), Ni (2), and Cu (3)) by using the 4-amino-1,2,4-triazole Schiff-base ligand via the hydrothermal methods. They are all mononuclear compounds with the octahedral geometry. Direct-current magnetic and HF-EPR measurements were combined to reveal the negative D values (-28.78 cm-1, -10.79 cm-1) of complexes 1 and 2, showing the easy-axis magnetic anisotropies of compounds 1 and 2. Applying a dc field of 800 Oe at 2.0 K, the slow magnetic relaxation effects were observed in compound 1, which is a remarkable feature of single-ion magnets.
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Affiliation(s)
- Ya-Jie Zhang
- Wuhan National High Magnetic Field Center & School of Physics, Huazhong University of Science and Technology Wuhan Hubei 430074 P. R. China
| | - Lei Yin
- Wuhan National High Magnetic Field Center & School of Physics, Huazhong University of Science and Technology Wuhan Hubei 430074 P. R. China
| | - Jing Li
- Wuhan National High Magnetic Field Center & School of Physics, Huazhong University of Science and Technology Wuhan Hubei 430074 P. R. China
| | - Zhao-Bo Hu
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University Nanjing 210023 P. R. China
| | - Zhong-Wen Ouyang
- Wuhan National High Magnetic Field Center & School of Physics, Huazhong University of Science and Technology Wuhan Hubei 430074 P. R. China
| | - You Song
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University Nanjing 210023 P. R. China
| | - Zhenxing Wang
- Wuhan National High Magnetic Field Center & School of Physics, Huazhong University of Science and Technology Wuhan Hubei 430074 P. R. China
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53
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Spiller N, Chilkuri VG, DeBeer S, Neese F. Sulfur vs. Selenium as Bridging Ligand in Di‐Iron Complexes: A Theoretical Analysis. Eur J Inorg Chem 2020. [DOI: 10.1002/ejic.202000033] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Nico Spiller
- Department of Molecular Theory and Spectroscopy Max‐Planck‐Institut für Kohlenforschung Kaiser‐Wilhelm‐Platz 1 45470 Mülheim an der Ruhr Germany
| | - Vijay Gopal Chilkuri
- Department of Molecular Theory and Spectroscopy Max‐Planck‐Institut für Kohlenforschung Kaiser‐Wilhelm‐Platz 1 45470 Mülheim an der Ruhr Germany
| | - Serena DeBeer
- Department of Inorganic Spectroscopy Max Planck Institute for Chemical Energy Conversion Stiftstr. 34‐36 45470 Mülheim an der Ruhr Germany
| | - Frank Neese
- Department of Molecular Theory and Spectroscopy Max‐Planck‐Institut für Kohlenforschung Kaiser‐Wilhelm‐Platz 1 45470 Mülheim an der Ruhr Germany
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54
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Thiel AM, Damgaard-Møller E, Overgaard J. High-Pressure Crystallography as a Guide in the Design of Single-Molecule Magnets. Inorg Chem 2020; 59:1682-1691. [PMID: 31944683 DOI: 10.1021/acs.inorgchem.9b02794] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Single-molecule magnet materials owe their function to the presence of significant magnetic anisotropy, which arises from the interplay between the ligand field and spin-orbit coupling, and this is responsible for setting up an energy barrier for magnetic relaxation. Therefore, chemical control of magnetic anisotropy is a central challenge in the quest to synthesize new molecular nanomagnets with improved properties. There have been several reports of design principles targeting such control; however, these principles rely on idealized geometries, which are rarely obtained in crystal structures. Here, we present the results of high-pressure single-crystal diffraction on the single-ion magnet, Co(SPh)4(PPh4)2, in the pressure range of 0-9.2 GPa. Upon pressurization a sequence of small geometrical distortions of the central CoS4 moeity are observed, enabling a thorough analysis of the magneto-structural correlations. The magneto-structural correlations are investigated by theoretical analyses of the pressure-dependent experimental molecular structures. We observed a significant increase in the magnitude of the zero-field splitting parameter D, from -54.6 cm-1 to -89.7 cm-1, which was clearly explained from the reduction of the energy difference between the essential dxy and dx2-y2 orbitals, and structurally assigned to the change of an angle of compression of the CoS4 moeity.
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Affiliation(s)
- Andreas M Thiel
- Department of Chemistry , Aarhus University , Langelandsgade 140 , DK-8000 Aarhus C , Denmark
| | - Emil Damgaard-Møller
- Department of Chemistry , Aarhus University , Langelandsgade 140 , DK-8000 Aarhus C , Denmark
| | - Jacob Overgaard
- Department of Chemistry , Aarhus University , Langelandsgade 140 , DK-8000 Aarhus C , Denmark
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55
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Lang L, Atanasov M, Neese F. Improvement of Ab Initio Ligand Field Theory by Means of Multistate Perturbation Theory. J Phys Chem A 2020; 124:1025-1037. [PMID: 31977214 PMCID: PMC7307914 DOI: 10.1021/acs.jpca.9b11227] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
![]()
Over
the last few years, ab initio ligand field theory (AILFT)
has evolved into an important tool for the extraction of ligand field
models from ab initio calculations. The inclusion of dynamic correlation
on top of complete active space self-consistent field (CASSCF) reference
functions, which is important for accurate results, was so far realized
at the level of second-order N-electron valence state perturbation
theory (NEVPT2). In this work, we introduce two alternative methods
for the inclusion of dynamic correlation into AILFT calculations,
the second-order dynamic correlation dressed complete active space
method (DCD-CAS(2)) and the Hermitian quasi-degenerate NEVPT2 (HQD-NEVPT2).
These methods belong to the class of multistate perturbation theory
approaches, which allow for the mixing of CASSCF states under the
effect of dynamic correlation (state-mixing). The two new versions
of AILFT were tested for a diverse set of transition-metal complexes.
It was found that the multistate methods have, compared to NEVPT2,
an AILFT fit with smaller root mean square deviations (rmsds) between
ab initio and AILFT energies. A comparison of AILFT excitation energies
with the experiment shows that for some systems, the agreement gets
better at the multistate level because of the smaller rmsds. However,
for some systems, the agreement gets worse, which could be attributed
to a cancellation of errors at the NEVPT2 level that is partly removed
at the multistate level. An investigation of trends in the extracted
ligand field parameters shows that at the multistate level, the ligand
field splitting Δ gets larger, whereas the Racah parameters B and C get smaller and larger, respectively.
An investigation of the reasons for the observed improvement for octahedral
CrIII halide complexes shows that the possibility of state-mixing
relaxes constraints that are present at the NEVPT2 level and that
keep Δ and B from following their individual
preferences.
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Affiliation(s)
- Lucas Lang
- Max-Planck-Institut für Kohlenforschung , Kaiser-Wilhelm-Platz 1 , 45470 Mülheim an der Ruhr , Germany
| | - Mihail Atanasov
- Max-Planck-Institut für Kohlenforschung , Kaiser-Wilhelm-Platz 1 , 45470 Mülheim an der Ruhr , Germany.,Institute of General and Inorganic Chemistry , Bulgarian Academy of Sciences , Akad. Georgi Bontchev Street 11 , 1113 Sofia , Bulgaria
| | - Frank Neese
- Max-Planck-Institut für Kohlenforschung , Kaiser-Wilhelm-Platz 1 , 45470 Mülheim an der Ruhr , Germany
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56
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Abstract
![]()
Despite their isoelectronic properties,
fluoro and oxo ligands
exhibit completely different chemical behavior. Formally speaking,
the first is known to exclusively form single bonds, while the latter
is generally observed to form double (or even triple) bonds. The biggest
difference, however, lies in what is known among inorganic chemists
as the Oxo Wall: the fact that six-coordinate tetragonal transition
metal oxo complexes are not observed beyond group 7 elements. While
the Oxo Wall was explained a few decades ago, some questions regarding
the nature of the Oxo Wall remain unanswered. For example, why do
group 8 oxo complexes with high oxidation states not violate the Oxo
Wall? Moreover, why are transition metal fluoro complexes observed
through the whole transition metal series? In order to understand
how the small difference between these two isoelectronic ligands can
give rise to such different chemical behaviors, we conducted an extensive
computational analysis of the geometric and electronic properties
of model fluoro and oxo complexes with metals around the Oxo Wall.
Among many insights into the details of the Oxo Wall, we mostly learned
that the oxygen 2p orbitals are prone to meaningfully interact with
transition metal d orbitals, because they match not only spatially
but also energetically, while for fluorine the p orbital energies
are lower to an extent that interaction with transition metal d orbitals
is much reduced. This in turn implies that in those instances where
the metal d orbitals principally accessible for interaction are occupied,
the oxygen 2p orbitals are too exposed to be stable. A computational analysis was conducted
in order to understand
how a subtle difference between the isoelectronic fluoro and oxo ligands
can give rise to such different chemical behaviors, including the
presence of an Oxo Wall but not a Fluoro Wall. It seems that the small
energetic difference of the ligands’ 2p orbitals is enough
to inhibit meaningful interaction with transition metal d orbitals
for the fluoro ligand, which eventually leads to the observed chemical
behaviors.
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Affiliation(s)
- Julian D Rolfes
- Max-Planck-Institut für Kohlenforschung , Kaiser-Wilhelm-Platz 1 , D-45470 Mülheim an der Ruhr , Germany
| | - Maurice van Gastel
- Max-Planck-Institut für Kohlenforschung , Kaiser-Wilhelm-Platz 1 , D-45470 Mülheim an der Ruhr , Germany
| | - Frank Neese
- Max-Planck-Institut für Kohlenforschung , Kaiser-Wilhelm-Platz 1 , D-45470 Mülheim an der Ruhr , Germany
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57
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Autillo M, Islam MA, Jung J, Pilmé J, Galland N, Guerin L, Moisy P, Berthon C, Tamain C, Bolvin H. Crystallographic structure and crystal field parameters in the [AnIV(DPA)3]2− series, An = Th, U, Np, Pu. Phys Chem Chem Phys 2020; 22:14293-14308. [DOI: 10.1039/d0cp02137g] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The [AnIV(DPA)3]2− series with An = Th, U, Np, Pu has been synthesized and characterized using SC-XRD, vibrational spectroscopy, and first principles calculations.
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Affiliation(s)
| | - Md. Ashraful Islam
- Laboratoire de Chimie et Physique Quantiques
- CNRS
- Université Toulouse III
- 31062 Toulouse
- France
| | - Julie Jung
- Theoretical division
- Los Alamos National Laboratory
- Los Alamos
- USA
| | - Julien Pilmé
- Sorbonne Université
- CNRS
- Laboratoire de Chimie Théorique CC 137-4 place Jussieu
- 75252 Paris Cédex 05
- France
| | | | | | | | | | | | - Hélène Bolvin
- Laboratoire de Chimie et Physique Quantiques
- CNRS
- Université Toulouse III
- 31062 Toulouse
- France
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58
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Cen P, Wang M, Ma X, Chen L, Zhang YQ, Li Y, Tian D, Liu X. Coordination microenvironment perturbed single-ion magnet behavior in a β-diketone Dy( iii) complex. CrystEngComm 2020. [DOI: 10.1039/d0ce00935k] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Employing mixed β-diketonate and bpy ligands leads to a mononuclear Dy(iii) SIM, of which the magneto-structural correlation is elucidated by the magnetic and theoretical studies, as well as a comparative study of reported analogues.
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Affiliation(s)
- Peipei Cen
- College of Public Health and Management
- Ningxia Medical University
- Yinchuan 750021
- China
| | - Meilin Wang
- College of Public Health and Management
- Ningxia Medical University
- Yinchuan 750021
- China
| | - Xiufang Ma
- State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering
- National Demonstration Center for Experimental Chemistry Education
- College of Chemistry and Chemical Engineering
- Ningxia University
- Yinchuan 750021
| | - Lei Chen
- School of Material Science and Engineering
- Jiangsu University of Science and Technology
- Zhenjiang 212003
- China
| | - Yi-Quan Zhang
- Jiangsu Key Laboratory for NSLSCS
- School of Physical Science and Technology
- Nanjing Normal University
- Nanjing 210023
- China
| | - Yonghong Li
- College of Public Health and Management
- Ningxia Medical University
- Yinchuan 750021
- China
| | - Danian Tian
- College of Public Health and Management
- Ningxia Medical University
- Yinchuan 750021
- China
| | - Xiangyu Liu
- State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering
- National Demonstration Center for Experimental Chemistry Education
- College of Chemistry and Chemical Engineering
- Ningxia University
- Yinchuan 750021
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59
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Cook AW, Hrobárik P, Damon PL, Najera D, Horváth B, Wu G, Hayton TW. Synthesis and Characterization of a Linear, Two-Coordinate Pt(II) Ketimide Complex. Inorg Chem 2019; 58:15927-15935. [DOI: 10.1021/acs.inorgchem.9b02443] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Andrew W. Cook
- Department of Chemistry and Biochemistry, University of California Santa Barbara, Santa Barbara, California 93106, United States
| | - Peter Hrobárik
- Department of Inorganic Chemistry, Faculty of Natural Sciences, Comenius University, SK-84215 Bratislava, Slovakia
| | - Peter L. Damon
- Department of Chemistry and Biochemistry, University of California Santa Barbara, Santa Barbara, California 93106, United States
| | - Daniel Najera
- Department of Chemistry and Biochemistry, University of California Santa Barbara, Santa Barbara, California 93106, United States
| | - Branislav Horváth
- Central NMR Laboratory, Faculty of Pharmacy, Comenius University, SK-83232 Bratislava, Slovakia
| | - Guang Wu
- Department of Chemistry and Biochemistry, University of California Santa Barbara, Santa Barbara, California 93106, United States
| | - Trevor W. Hayton
- Department of Chemistry and Biochemistry, University of California Santa Barbara, Santa Barbara, California 93106, United States
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60
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Jung J, Islam MA, Pecoraro VL, Mallah T, Berthon C, Bolvin H. Derivation of Lanthanide Series Crystal Field Parameters From First Principles. Chemistry 2019; 25:15112-15122. [PMID: 31496013 DOI: 10.1002/chem.201903141] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2019] [Revised: 08/28/2019] [Indexed: 11/08/2022]
Abstract
Two series of lanthanide complexes have been chosen to analyze trends in the magnetic properties and crystal field parameters (CFPs) along the two series: The highly symmetric LnZn16 (picHA)16 series (Ln=Tb, Dy, Ho, Er, Yb; picHA=picolinohydroxamic acid) and the [Ln(dpa)3 ](C3 H5 N2 )3 ⋅3H2 O series (Ln=Ce-Yb; dpa=2,6-dipicolinic acid) with approximate three-fold symmetry. The first series presents a compressed coordination sphere of eight oxygen atoms whereas in the second series, the coordination sphere consists of an elongated coordination sphere formed of six oxygen atoms. The CFPs have been deduced from ab initio calculations using two methods: The AILFT (ab initio ligand field theory) method, in which the parameters are determined at the orbital level, and the ITO (irreducible tensor operator) decomposition, in which the problems are treated at the many-electron level. It has been found that the CFPs are transferable from one derivative to another, within a given series, as a first approximation. The sign of the second-order parameter B 0 2 differs in the two series, reflecting the different environments. It has been found that the use of the strength parameter S allows for an easy comparison between complexes. Furthermore, in both series, the parameters have been found to decrease in magnitude along the series, and this decrease is attributed to covalent effects.
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Affiliation(s)
- Julie Jung
- Theoretical division, Los Alamos National Laboratory, Los Alamos, New Mexico, 87545, USA
| | - M Ashraful Islam
- Laboratoire de Chimie et Physique Quantiques, CNRS, Université Toulouse III, 118 route de Narbonne, 31062, Toulouse, France
| | - Vincent L Pecoraro
- Department of Chemistry, Willard H. Dow Laboratories, University of Michigan, Ann Arbor, Michigan, 48109, USA
| | - Talal Mallah
- Institut de Chimie Moléculaire et des Matériaux d'Orsay, CNRS, Université de Paris-Sud 11, 91405, Orsay Cedex, France
| | - Claude Berthon
- CEA, Nuclear Energy Division, Radiochemistry Processes Department, DRCP, BP 17171, 30207, Bagnols sur Cèze, France
| | - Hélène Bolvin
- Laboratoire de Chimie et Physique Quantiques, CNRS, Université Toulouse III, 118 route de Narbonne, 31062, Toulouse, France
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61
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Bodenstein T, Eichhöfer A. Magnetic anisotropy in trigonal planar Fe(ii) bis(trimethylsilyl)amido complexes of the type [Fe{N(SiMe 3) 2} 2L]-experiment and theory. Dalton Trans 2019; 48:15699-15712. [PMID: 31538172 DOI: 10.1039/c9dt01702j] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Systematic ac (alternating current) magnetic investigations on four new trigonal planar high-spin Fe2+ complexes [Fe{N(SiMe3)2}2L] reveal that complexes which comprise a phosphine or arsine type ligand (L = PPh3, PMe3 and AsPh3) display slow magnetic relaxation at temperatures below 8 K under applied dc (direct current) fields, whereas a complex with a phosphine oxide ligand (L = OPPh3) does not. Accordingly, the parameters characteristic for magnetic anisotropy, derived both from dc magnetic measurements and quantum chemical calculations, reveal distinct differences for these two types of complexes. Extensive ab initio calculations of multi-reference wave function type were performed on the four new complexes listed above and the related reported ones with L = py, thf and PCy3 in order to get a reasonable description of the local electronic states involved in the magnetic relaxation. These calculations confirm that strong spin-orbit effects generate the magnetic anisotropy of complexes with L = PPh3, PMe3, AsPh3 and PCy3. On the other hand, the complexes with L = OPPh3, py and THF exhibit only small spin-orbit splittings, consistent with the fast relaxation found experimentally.
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Affiliation(s)
- Tilmann Bodenstein
- Institut für Nanotechnologie, Karlsruher Institut für Technologie (KIT), Campus Nord, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany.
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62
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Fdez. Galván I, Vacher M, Alavi A, Angeli C, Aquilante F, Autschbach J, Bao JJ, Bokarev SI, Bogdanov NA, Carlson RK, Chibotaru LF, Creutzberg J, Dattani N, Delcey MG, Dong SS, Dreuw A, Freitag L, Frutos LM, Gagliardi L, Gendron F, Giussani A, González L, Grell G, Guo M, Hoyer CE, Johansson M, Keller S, Knecht S, Kovačević G, Källman E, Li Manni G, Lundberg M, Ma Y, Mai S, Malhado JP, Malmqvist PÅ, Marquetand P, Mewes SA, Norell J, Olivucci M, Oppel M, Phung QM, Pierloot K, Plasser F, Reiher M, Sand AM, Schapiro I, Sharma P, Stein CJ, Sørensen LK, Truhlar DG, Ugandi M, Ungur L, Valentini A, Vancoillie S, Veryazov V, Weser O, Wesołowski TA, Widmark PO, Wouters S, Zech A, Zobel JP, Lindh R. OpenMolcas: From Source Code to Insight. J Chem Theory Comput 2019; 15:5925-5964. [DOI: 10.1021/acs.jctc.9b00532] [Citation(s) in RCA: 399] [Impact Index Per Article: 79.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Ignacio Fdez. Galván
- Department of Chemistry − Ångström Laboratory, Uppsala University, P.O. Box 538, SE-751 21 Uppsala, Sweden
- Department of Chemistry − BMC, Uppsala University, P.O. Box 576, SE-751 23 Uppsala, Sweden
| | - Morgane Vacher
- Department of Chemistry − Ångström Laboratory, Uppsala University, P.O. Box 538, SE-751 21 Uppsala, Sweden
| | - Ali Alavi
- Max Planck Institut für Festkörperforschung, Heisenbergstraße 1, 70569 Stuttgart, Germany
| | - Celestino Angeli
- Dipartimento di Scienze Chimiche e Farmaceutiche, Università di Ferrara, Via Luigi Borsari 46, 44121 Ferrara, Italy
| | - Francesco Aquilante
- Département de Chimie Physique, Université de Genève, 30 quai Ernest-Ansermet, CH-1211 Genève 4, Switzerland
| | - Jochen Autschbach
- Department of Chemistry, University at Buffalo, State University of New York, Buffalo, New York 14260-3000, United States
| | - Jie J. Bao
- Department of Chemistry, Chemical Theory Center, and Minnesota Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455-0431, United States
| | - Sergey I. Bokarev
- Institut für Physik, Universität Rostock, Albert-Einstein-Straße 23-24, 18059 Rostock, Germany
| | - Nikolay A. Bogdanov
- Max Planck Institut für Festkörperforschung, Heisenbergstraße 1, 70569 Stuttgart, Germany
| | - Rebecca K. Carlson
- Department of Chemistry, Chemical Theory Center, and Minnesota Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455-0431, United States
| | - Liviu F. Chibotaru
- Theory of Nanomaterials Group, University of Leuven, Celestijnenlaan 200F, Leuven 3001, Belgium
| | - Joel Creutzberg
- Department of Physics, AlbaNova University Center, Stockholm University, SE-106 91 Stockholm, Sweden
- Division of Theoretical Chemistry, Kemicentrum, Lund University, P.O. Box 124, SE-221 00 Lund, Sweden
| | - Nike Dattani
- Harvard Smithsonian Center for Astrophysics, Cambridge, Massachusetts 02138, United States
| | - Mickaël G. Delcey
- Department of Chemistry − Ångström Laboratory, Uppsala University, P.O. Box 538, SE-751 21 Uppsala, Sweden
| | - Sijia S. Dong
- Department of Chemistry, Chemical Theory Center, and Minnesota Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455-0431, United States
| | - Andreas Dreuw
- Interdisciplinary Center for Scientific Computing, Heidelberg University, Im Neuenheimer Feld 205 A, 69120 Heidelberg, Germany
| | - Leon Freitag
- Laboratorium für Physikalische Chemie, ETH Zürich, Vladimir-Prelog-Weg 2, 8093 Zürich, Switzerland
| | - Luis Manuel Frutos
- Departamento de Química Analítica, Química Física e Ingeniería Química, and Instituto de Investigación Química “Andrés M. del Río”, Universidad de Alcalá, E-28871 Alcalá de Henares, Madrid, Spain
| | - Laura Gagliardi
- Department of Chemistry, Chemical Theory Center, and Minnesota Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455-0431, United States
| | - Frédéric Gendron
- Department of Chemistry, University at Buffalo, State University of New York, Buffalo, New York 14260-3000, United States
| | - Angelo Giussani
- Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, United Kingdom
- Instituto de Ciencia Molecular, Universitat de València, Apartado 22085, ES-46071 Valencia, Spain
| | - Leticia González
- Institute of Theoretical Chemistry, Faculty of Chemistry, University of Vienna, Währinger Straße 17, 1090 Vienna, Austria
| | - Gilbert Grell
- Institut für Physik, Universität Rostock, Albert-Einstein-Straße 23-24, 18059 Rostock, Germany
| | - Meiyuan Guo
- Department of Chemistry − Ångström Laboratory, Uppsala University, P.O. Box 538, SE-751 21 Uppsala, Sweden
| | - Chad E. Hoyer
- Department of Chemistry, Chemical Theory Center, and Minnesota Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455-0431, United States
| | - Marcus Johansson
- Division of Theoretical Chemistry, Kemicentrum, Lund University, P.O. Box 124, SE-221 00 Lund, Sweden
| | - Sebastian Keller
- Laboratorium für Physikalische Chemie, ETH Zürich, Vladimir-Prelog-Weg 2, 8093 Zürich, Switzerland
| | - Stefan Knecht
- Laboratorium für Physikalische Chemie, ETH Zürich, Vladimir-Prelog-Weg 2, 8093 Zürich, Switzerland
| | - Goran Kovačević
- Division of Materials Physics, Ruđer Bošković Institute, P.O.B. 180, Bijenička 54, HR-10002 Zagreb, Croatia
| | - Erik Källman
- Department of Chemistry − Ångström Laboratory, Uppsala University, P.O. Box 538, SE-751 21 Uppsala, Sweden
| | - Giovanni Li Manni
- Max Planck Institut für Festkörperforschung, Heisenbergstraße 1, 70569 Stuttgart, Germany
| | - Marcus Lundberg
- Department of Chemistry − Ångström Laboratory, Uppsala University, P.O. Box 538, SE-751 21 Uppsala, Sweden
| | - Yingjin Ma
- Laboratorium für Physikalische Chemie, ETH Zürich, Vladimir-Prelog-Weg 2, 8093 Zürich, Switzerland
| | - Sebastian Mai
- Institute of Theoretical Chemistry, Faculty of Chemistry, University of Vienna, Währinger Straße 17, 1090 Vienna, Austria
| | - João Pedro Malhado
- Department of Chemistry, Imperial College London, London SW7 2AZ, United Kingdom
| | - Per Åke Malmqvist
- Division of Theoretical Chemistry, Kemicentrum, Lund University, P.O. Box 124, SE-221 00 Lund, Sweden
| | - Philipp Marquetand
- Institute of Theoretical Chemistry, Faculty of Chemistry, University of Vienna, Währinger Straße 17, 1090 Vienna, Austria
| | - Stefanie A. Mewes
- Interdisciplinary Center for Scientific Computing, Heidelberg University, Im Neuenheimer Feld 205 A, 69120 Heidelberg, Germany
- Centre for Theoretical Chemistry and Physics, The New Zealand Institute for Advanced Study (NZIAS), Massey University Albany, Private Bag
102904, Auckland 0632, New Zealand
| | - Jesper Norell
- Department of Physics, AlbaNova University Center, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Massimo Olivucci
- Department of Biotechnology, Chemistry and Pharmacy, University of Siena, via A. Moro 2, 53100 Siena, Italy
- Department of Chemistry, Bowling Green State University, Bowling Green, Ohio 43403, United States
- USIAS and Institut de Physique et Chimie des Matériaux de Strasbourg, Université de Strasbourg-CNRS, 67034 Strasbourg, France
| | - Markus Oppel
- Institute of Theoretical Chemistry, Faculty of Chemistry, University of Vienna, Währinger Straße 17, 1090 Vienna, Austria
| | - Quan Manh Phung
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F, Leuven 3001, Belgium
| | - Kristine Pierloot
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F, Leuven 3001, Belgium
| | - Felix Plasser
- Department of Chemistry, Loughborough University, Loughborough LE11 3TU, United Kingdom
| | - Markus Reiher
- Laboratorium für Physikalische Chemie, ETH Zürich, Vladimir-Prelog-Weg 2, 8093 Zürich, Switzerland
| | - Andrew M. Sand
- Department of Chemistry, Chemical Theory Center, and Minnesota Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455-0431, United States
| | - Igor Schapiro
- Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Prachi Sharma
- Department of Chemistry, Chemical Theory Center, and Minnesota Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455-0431, United States
| | - Christopher J. Stein
- Laboratorium für Physikalische Chemie, ETH Zürich, Vladimir-Prelog-Weg 2, 8093 Zürich, Switzerland
| | - Lasse Kragh Sørensen
- Department of Chemistry − Ångström Laboratory, Uppsala University, P.O. Box 538, SE-751 21 Uppsala, Sweden
| | - Donald G. Truhlar
- Department of Chemistry, Chemical Theory Center, and Minnesota Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455-0431, United States
| | - Mihkel Ugandi
- Department of Chemistry − Ångström Laboratory, Uppsala University, P.O. Box 538, SE-751 21 Uppsala, Sweden
| | - Liviu Ungur
- Department of Chemistry, National University of Singapore, 117543 Singapore
| | - Alessio Valentini
- Theoretical Physical Chemistry, Research Unit MolSys, Allée du 6 Août, 11, 4000 Liège, Belgium
| | - Steven Vancoillie
- Division of Theoretical Chemistry, Kemicentrum, Lund University, P.O. Box 124, SE-221 00 Lund, Sweden
| | - Valera Veryazov
- Division of Theoretical Chemistry, Kemicentrum, Lund University, P.O. Box 124, SE-221 00 Lund, Sweden
| | - Oskar Weser
- Max Planck Institut für Festkörperforschung, Heisenbergstraße 1, 70569 Stuttgart, Germany
| | - Tomasz A. Wesołowski
- Département de Chimie Physique, Université de Genève, 30 quai Ernest-Ansermet, CH-1211 Genève 4, Switzerland
| | - Per-Olof Widmark
- Division of Theoretical Chemistry, Kemicentrum, Lund University, P.O. Box 124, SE-221 00 Lund, Sweden
| | - Sebastian Wouters
- Brantsandpatents, Pauline van Pottelsberghelaan 24, 9051 Sint-Denijs-Westrem, Belgium
| | - Alexander Zech
- Département de Chimie Physique, Université de Genève, 30 quai Ernest-Ansermet, CH-1211 Genève 4, Switzerland
| | - J. Patrick Zobel
- Division of Theoretical Chemistry, Kemicentrum, Lund University, P.O. Box 124, SE-221 00 Lund, Sweden
| | - Roland Lindh
- Department of Chemistry − BMC, Uppsala University, P.O. Box 576, SE-751 23 Uppsala, Sweden
- Uppsala Center for Computational Chemistry (UC3), Uppsala University, P.O. Box 596, SE-751 24 Uppsala, Sweden
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63
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Bhanja A, Herchel R, Trávníček Z, Ray D. Two Types of Hexanuclear Partial Tetracubane [Ni4Ln2] (Ln = Dy, Tb, Ho) Complexes of Thioether-Based Schiff Base Ligands: Synthesis, Structure, and Comparison of Magnetic Properties. Inorg Chem 2019; 58:12184-12198. [DOI: 10.1021/acs.inorgchem.9b01517] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Avik Bhanja
- Department of Chemistry, Indian Institute of Technology, Kharagpur 721302, India
| | - Radovan Herchel
- Department of Inorganic Chemistry, Faculty of Science, Palacký University, 17 Listopadu 12, 77146 Olomouc, Czech Republic
| | - Zdeněk Trávníček
- Division of Biologically Active Complexes and Molecular Magnets, Regional Centre of Advanced Technologies and Materials, Faculty of Science, Palacký University, Šlechtitelů 27, 783 71 Olomouc, Czech Republic
| | - Debashis Ray
- Department of Chemistry, Indian Institute of Technology, Kharagpur 721302, India
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64
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Canaj AB, Dey S, Martí ER, Wilson C, Rajaraman G, Murrie M. Insight into
D
6
h
Symmetry: Targeting Strong Axiality in Stable Dysprosium(III) Hexagonal Bipyramidal Single‐Ion Magnets. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201907686] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Angelos B. Canaj
- WestCHEM School of Chemistry University of Glasgow University Avenue Glasgow G12 8QQ UK
| | - Sourav Dey
- Department of Chemistry Indian Institute of Technology Bombay, Powai Mumbai Maharashtra 400076 India
| | - Emma Regincós Martí
- WestCHEM School of Chemistry University of Glasgow University Avenue Glasgow G12 8QQ UK
| | - Claire Wilson
- WestCHEM School of Chemistry University of Glasgow University Avenue Glasgow G12 8QQ UK
| | - Gopalan Rajaraman
- Department of Chemistry Indian Institute of Technology Bombay, Powai Mumbai Maharashtra 400076 India
| | - Mark Murrie
- WestCHEM School of Chemistry University of Glasgow University Avenue Glasgow G12 8QQ UK
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65
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Canaj AB, Dey S, Martí ER, Wilson C, Rajaraman G, Murrie M. Insight into D 6h Symmetry: Targeting Strong Axiality in Stable Dysprosium(III) Hexagonal Bipyramidal Single-Ion Magnets. Angew Chem Int Ed Engl 2019; 58:14146-14151. [PMID: 31343095 PMCID: PMC6790654 DOI: 10.1002/anie.201907686] [Citation(s) in RCA: 117] [Impact Index Per Article: 23.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2019] [Indexed: 11/24/2022]
Abstract
Following a novel synthetic strategy where the strong uniaxial ligand field generated by the Ph3SiO− (Ph3SiO−=anion of triphenylsilanol) and the 2,4‐di‐tBu‐PhO− (2,4‐di‐tBu‐PhO−=anion of 2,4‐di‐tertbutylphenol) ligands combined with the weak equatorial field of the ligand LN6, leads to [DyIII(LN6)(2,4‐di‐tBu‐PhO)2](PF6) (1), [DyIII(LN6)(Ph3SiO)2](PF6) (2) and [DyIII(LN6)(Ph3SiO)2](BPh4) (3) hexagonal bipyramidal dysprosium(III) single‐molecule magnets (SMMs) with high anisotropy barriers of Ueff=973 K for 1, Ueff=1080 K for 2 and Ueff=1124 K for 3 under zero applied dc field. Ab initio calculations predict that the dominant magnetization reversal barrier of these complexes expands up to the 3rd Kramers doublet, thus revealing for the first time the exceptional uniaxial magnetic anisotropy that even the six equatorial donor atoms fail to negate, opening up the possibility to other higher‐order symmetry SMMs.
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Affiliation(s)
- Angelos B Canaj
- WestCHEM, School of Chemistry, University of Glasgow, University Avenue, Glasgow, G12 8QQ, UK
| | - Sourav Dey
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, Maharashtra, 400076, India
| | - Emma Regincós Martí
- WestCHEM, School of Chemistry, University of Glasgow, University Avenue, Glasgow, G12 8QQ, UK
| | - Claire Wilson
- WestCHEM, School of Chemistry, University of Glasgow, University Avenue, Glasgow, G12 8QQ, UK
| | - Gopalan Rajaraman
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, Maharashtra, 400076, India
| | - Mark Murrie
- WestCHEM, School of Chemistry, University of Glasgow, University Avenue, Glasgow, G12 8QQ, UK
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66
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Mandal S, Majumder S, Mohanta S. Syntheses, Crystal Structures and Experimental/Theoretical Magnetic Properties of Two Butterfly Ni
II
2
Y
III
2
Compounds. ChemistrySelect 2019. [DOI: 10.1002/slct.201902302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Shuvankar Mandal
- Department of ChemistryInorganic Chemistry SectionUniversity of Calcutta 92 A. P. C Road Kolkata 700 009 India
| | - Samit Majumder
- Department of ChemistryBhairab Ganguly College,2 Feeder Road,Belghoria, Kolkata West Bengal 700056 India
| | - Sasankasekhar Mohanta
- Department of ChemistryInorganic Chemistry SectionUniversity of Calcutta 92 A. P. C Road Kolkata 700 009 India
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67
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Yang H, Li H, Li J, Sun Z, He K, Cheng HM, Li F. The Rechargeable Aluminum Battery: Opportunities and Challenges. Angew Chem Int Ed Engl 2019; 58:11978-11996. [PMID: 30687993 DOI: 10.1002/anie.201814031] [Citation(s) in RCA: 100] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Indexed: 11/10/2022]
Abstract
Aluminum battery systems are considered as a system that could supplement current lithium batteries due to the low cost and high volumetric capacity of aluminum metal, and the high safety of the whole battery system. However, first the use of ionic liquid electrolytes leading to AlCl4 - instead of Al3+ , the different intercalation reagents, the sluggish solid diffusion process and the fast capacity fading during cycling in aluminum batteries all need to be thoroughly explored. To provide a good understanding of the opportunities and challenges of the newly emerging aluminum batteries, this Review discusses the reaction mechanisms and the difficulties caused by the trivalent reaction medium in electrolytes, electrodes, and electrode-electrolyte interfaces. It is hoped that the Review will stimulate scientists and engineers to develop more reliable aluminum batteries.
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Affiliation(s)
- Huicong Yang
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China.,School of Materials Science and Engineering, University of Science and Technology of China, Shenyang, 110016, China
| | - Hucheng Li
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China.,School of Materials Science and Engineering, University of Science and Technology of China, Shenyang, 110016, China
| | - Juan Li
- College of physics, Jilin University, Changchun, 130012, China
| | - Zhenhua Sun
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China.,School of Materials Science and Engineering, University of Science and Technology of China, Shenyang, 110016, China
| | - Kuang He
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China.,School of Materials Science and Engineering, University of Science and Technology of China, Shenyang, 110016, China
| | - Hui-Ming Cheng
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China.,School of Materials Science and Engineering, University of Science and Technology of China, Shenyang, 110016, China.,Tsinghua-Berkeley Shenzhen Institute, Tsinghua University, Shenzhen, 518055, China
| | - Feng Li
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China.,School of Materials Science and Engineering, University of Science and Technology of China, Shenyang, 110016, China
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68
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Yang H, Li H, Li J, Sun Z, He K, Cheng H, Li F. Die wiederaufladbare Aluminiumbatterie: Möglichkeiten und Herausforderungen. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201814031] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Huicong Yang
- Shenyang National Laboratory for Materials ScienceInstitute of Metal ResearchChinese Academy of Sciences Shenyang 110016 China
- School of Materials Science and EngineeringUniversity of Science and Technology of China Shenyang 110016 China
| | - Hucheng Li
- Shenyang National Laboratory for Materials ScienceInstitute of Metal ResearchChinese Academy of Sciences Shenyang 110016 China
- School of Materials Science and EngineeringUniversity of Science and Technology of China Shenyang 110016 China
| | - Juan Li
- College of physicsJilin University Changchun 130012 China
| | - Zhenhua Sun
- Shenyang National Laboratory for Materials ScienceInstitute of Metal ResearchChinese Academy of Sciences Shenyang 110016 China
- School of Materials Science and EngineeringUniversity of Science and Technology of China Shenyang 110016 China
| | - Kuang He
- Shenyang National Laboratory for Materials ScienceInstitute of Metal ResearchChinese Academy of Sciences Shenyang 110016 China
- School of Materials Science and EngineeringUniversity of Science and Technology of China Shenyang 110016 China
| | - Hui‐Ming Cheng
- Shenyang National Laboratory for Materials ScienceInstitute of Metal ResearchChinese Academy of Sciences Shenyang 110016 China
- School of Materials Science and EngineeringUniversity of Science and Technology of China Shenyang 110016 China
- Tsinghua-Berkeley Shenzhen InstituteTsinghua University Shenzhen 518055 China
| | - Feng Li
- Shenyang National Laboratory for Materials ScienceInstitute of Metal ResearchChinese Academy of Sciences Shenyang 110016 China
- School of Materials Science and EngineeringUniversity of Science and Technology of China Shenyang 110016 China
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69
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Ozumerzifon TJ, Higgins RF, Joyce JP, Kolanowski JL, Rappé AK, Shores MP. Evidence for Reagent-Induced Spin-State Switching in Tripodal Fe(II) Iminopyridine Complexes. Inorg Chem 2019; 58:7785-7793. [DOI: 10.1021/acs.inorgchem.9b00340] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Tarik J. Ozumerzifon
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Robert F. Higgins
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Justin P. Joyce
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Jacek L. Kolanowski
- Institute of Bioorganic Chemistry, Polish Academy of Sciences, Noskowskiego 12/14, 61-704 Poznań, Poland
| | - Anthony K. Rappé
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Matthew P. Shores
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
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70
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Guo FS, Bar AK, Layfield RA. Main Group Chemistry at the Interface with Molecular Magnetism. Chem Rev 2019; 119:8479-8505. [PMID: 31059235 DOI: 10.1021/acs.chemrev.9b00103] [Citation(s) in RCA: 121] [Impact Index Per Article: 24.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Innovative synthetic coordination and, increasingly, organometallic chemistry are at the heart of advances in molecular magnetism. Smart ligand design is essential for implementing controlled modifications to the electronic structure and magnetic properties of transition metal and f-element compounds, and many important recent developments use nontraditional ligands based on low-coordinate main group elements to drive the field forward. This review charts progress in molecular magnetism from the perspective of ligands in which the donor atoms range from low-coordinate 2p elements-particularly carbon but also boron and nitrogen-to the heavier p-block elements such as phosphorus, arsenic, antimony, and even bismuth. Emphasis is placed on the role played by novel main group ligands in addressing magnetic anisotropy of transition metal and f-element compounds, which underpins the development of single-molecule magnets (SMMs), a family of magnetic materials that can retain magnetization in the absence of a magnetic field below a blocking temperature. Nontraditional p-block donor atoms, with their relatively diffuse valence orbitals and more diverse bonding characteristics, also introduce scope for tuning the spin-orbit coupling properties and metal-ligand covalency in molecular magnets, which has implications in areas such as magnetic exchange coupling and spin crossover phenomena. The chemistry encompasses transition metals, lanthanides, and actinides and describes recently discovered molecular magnets that can be regarded, currently, as defining the state of the art. This review identifies that main group chemistry at the interface molecular magnetism is an area with huge potential to deliver new types of molecular magnets with previously unseen properties and applications.
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Affiliation(s)
- Fu-Sheng Guo
- Department of Chemistry, School of Life Sciences , University of Sussex , Brighton BN1 9QJ , United Kingdom
| | - Arun Kumar Bar
- Department of Chemistry, School of Life Sciences , University of Sussex , Brighton BN1 9QJ , United Kingdom
| | - Richard A Layfield
- Department of Chemistry, School of Life Sciences , University of Sussex , Brighton BN1 9QJ , United Kingdom
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71
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Pavlov AA, Aleshin DY, Savkina SA, Belov AS, Efimov NN, Nehrkorn J, Ozerov M, Voloshin YZ, Nelyubina YV, Novikov VV. A Trigonal Prismatic Cobalt(II) Complex as a Single Molecule Magnet with a Reduced Contribution from Quantum Tunneling. Chemphyschem 2019; 20:1001-1005. [PMID: 30897255 DOI: 10.1002/cphc.201900219] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2019] [Indexed: 01/27/2023]
Abstract
Herein, we report a new trigonal prismatic cobalt(II) complex that behaves as a single molecule magnet. The obtained zero-field splitting, which is also directly accessed by THz-EPR spectroscopy (-102.5 cm-1 ), results in a large magnetization reversal barrier U of 205 cm-1 . Its effective value, however, is much lower (101 cm-1 ), even though there is practically no contribution from quantum tunneling to magnetization relaxation.
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Affiliation(s)
- Alexander A Pavlov
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilova str. 28, 119991, Moscow, Russia
| | - Dmitry Y Aleshin
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilova str. 28, 119991, Moscow, Russia.,D. Mendeleyev University of Chemical Technology of Russia, Miusskaya pl. 9, 125047, Moscow, Russia
| | - Svetlana A Savkina
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilova str. 28, 119991, Moscow, Russia
| | - Alexander S Belov
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilova str. 28, 119991, Moscow, Russia
| | - Nikolay N Efimov
- Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninskii prosp., 31, 117901, Moscow, Russia
| | - Joscha Nehrkorn
- National High Magnetic Field Laboratory & Florida State University 1800 E. Paul Dirac Drive Tallahassee, FL 32310-3706, USA.,Max Planck Institute for Chemical Energy Conversion, Stiftstr. 34-36, 45470, Mülheim an der Ruhr, Germany
| | - Mykhaylo Ozerov
- National High Magnetic Field Laboratory & Florida State University 1800 E. Paul Dirac Drive Tallahassee, FL 32310-3706, USA
| | - Yan Z Voloshin
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilova str. 28, 119991, Moscow, Russia.,Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninskii prosp., 31, 117901, Moscow, Russia
| | - Yulia V Nelyubina
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilova str. 28, 119991, Moscow, Russia.,Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninskii prosp., 31, 117901, Moscow, Russia
| | - Valentin V Novikov
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilova str. 28, 119991, Moscow, Russia
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72
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Cai IC, Ziegler MS, Bunting PC, Nicolay A, Levine DS, Kalendra V, Smith PW, Lakshmi KV, Tilley TD. Monomeric, Divalent Vanadium Bis(arylamido) Complexes: Linkage Isomerism and Reactivity. Organometallics 2019. [DOI: 10.1021/acs.organomet.9b00134] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Irene C. Cai
- Department of Chemistry, University of California, Berkeley, California 94720-1460, United States
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Micah S. Ziegler
- Department of Chemistry, University of California, Berkeley, California 94720-1460, United States
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Philip C. Bunting
- Department of Chemistry, University of California, Berkeley, California 94720-1460, United States
| | - Amélie Nicolay
- Department of Chemistry, University of California, Berkeley, California 94720-1460, United States
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Daniel S. Levine
- Department of Chemistry, University of California, Berkeley, California 94720-1460, United States
| | - Vidmantas Kalendra
- Department of Chemistry and Chemical Biology and The Baruch ’60 Center for Biochemical Solar Energy Research, Rensselaer Polytechnic Institute, Troy, New York 12180, United States
| | - Patrick W. Smith
- Department of Chemistry, University of California, Berkeley, California 94720-1460, United States
| | - K. V. Lakshmi
- Department of Chemistry and Chemical Biology and The Baruch ’60 Center for Biochemical Solar Energy Research, Rensselaer Polytechnic Institute, Troy, New York 12180, United States
| | - T. Don Tilley
- Department of Chemistry, University of California, Berkeley, California 94720-1460, United States
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
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73
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Alexandropoulos DI, Vignesh KR, Stamatatos TC, Dunbar KR. Rare "Janus"-faced single-molecule magnet exhibiting intramolecular ferromagnetic interactions. Chem Sci 2019; 10:1626-1633. [PMID: 30842825 PMCID: PMC6368239 DOI: 10.1039/c8sc04384a] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2018] [Accepted: 11/03/2018] [Indexed: 11/21/2022] Open
Abstract
The unusual ferromagnetically coupled compound was prepared by the use of Me3SiN3 with the metal ions being exclusively bridged by end-on N3–. Th cationic molecule is a rare example of a 3d-metal cluster exhibiting a “Janus”-faced SMM behavior for the dried and wet forms.
A rare disk-like single-molecule magnet (SMM) exclusively bridged by end-on azides with a spin ground state of S = 14 was prepared by the reaction of a divalent FeII precursor with Me3SiN3 under basic conditions. AC magnetic susceptibility studies revealed unusual, “Janus”-faced SMM behavior for the dried and pristine forms of the compound attributed to solvation/de-solvation effects of the coordinated MeCN ligands which leads to alterations in the crystal field and symmetry of the metal ions. DFT calculations confirmed the ferromagnetic nature of the interactions between the FeII spin carriers with the zero-field splitting parameters D = –0.2323 cm–1 and E/D = 0.027. The results have important implications for the future study of single-molecule magnets incorporating volatile solvent molecules in the first coordination sphere of the metal ions and their effect on the relaxation dynamics.
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Affiliation(s)
| | - Kuduva R Vignesh
- Department of Chemistry , Texas A&M University , College Station , Texas 77843 , USA .
| | - Theocharis C Stamatatos
- Department of Chemistry , Brock University , 1812 Sir Isaac Brock Way , L2S 3A1 St. Catharines , Ontario , Canada .
| | - Kim R Dunbar
- Department of Chemistry , Texas A&M University , College Station , Texas 77843 , USA .
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74
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Thomsen MK, Nyvang A, Walsh JPS, Bunting PC, Long JR, Neese F, Atanasov M, Genoni A, Overgaard J. Insights into Single-Molecule-Magnet Behavior from the Experimental Electron Density of Linear Two-Coordinate Iron Complexes. Inorg Chem 2019; 58:3211-3218. [PMID: 30762344 DOI: 10.1021/acs.inorgchem.8b03301] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A breakthrough in the study of single-molecule magnets occurred with the discovery of zero-field slow magnetic relaxation and hysteresis for the linear iron(I) complex [Fe(C(SiMe3)3)2]- (1), which has one of the largest spin-reversal barriers among mononuclear transition-metal single-molecule magnets. Theoretical studies have suggested that the magnetic anisotropy in 1 is made possible by pronounced stabilization of the iron d z2 orbital due to 3d z2-4s mixing, an effect which is predicted to be less pronounced in the neutral iron(II) complex Fe(C(SiMe3)3)2 (2). However, experimental support for this interpretation has remained lacking. Here, we use high-resolution single-crystal X-ray diffraction data to generate multipole models of the electron density in these two complexes, which clearly show that the iron d z2 orbital is more populated in 1 than in 2. This result can be interpreted as arising from greater stabilization of the d z2 orbital in 1, thus offering an unprecedented experimental rationale for the origin of magnetic anisotropy in 1.
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Affiliation(s)
- Maja K Thomsen
- Department of Chemistry & Centre for Materials Crystallography , Aarhus University , DK-8000 Aarhus C , Denmark
| | - Andreas Nyvang
- Department of Chemistry & Centre for Materials Crystallography , Aarhus University , DK-8000 Aarhus C , Denmark
| | - James P S Walsh
- Department of Chemistry , Northwestern University , 2145 Sheridan Road , Evanston , Illinois 60208 United States
| | - Philip C Bunting
- Department of Chemistry , University of California , Berkeley , California 94720-1460 , United States
| | - Jeffrey R Long
- Department of Chemistry , University of California , Berkeley , California 94720-1460 , United States.,Department of Chemical and Biomolecular Engineering , University of California , Berkeley , California 94720-1460 , United States.,Materials Sciences Division , Lawrence Berkeley National Laboratory , Berkeley , California 94720 , United States
| | - Frank Neese
- Department of Molecular Theory and Spectroscopy , Max Planck Institut für Kohlenforschung , Kaiser-Wilhelm Platz 1 , D-45470 Mülheim an der Ruhr , Germany
| | - Michael Atanasov
- Department of Molecular Theory and Spectroscopy , Max Planck Institut für Kohlenforschung , Kaiser-Wilhelm Platz 1 , D-45470 Mülheim an der Ruhr , Germany.,Institute of General and Inorganic Chemistry , Bulgarian Academy of Sciences , Sofia 1113 , Bulgaria
| | - Alessandro Genoni
- Université de Lorraine and CNRS , Laboratoire de Physique et Chimie Théoriques (LPCT) , UMR CNRS 7019, 1 Boulevard Arago , F-57078 Metz , France
| | - Jacob Overgaard
- Department of Chemistry & Centre for Materials Crystallography , Aarhus University , DK-8000 Aarhus C , Denmark
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75
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Chakraborty A, Goura J, Bag P, Chandrasekhar V. Ni
II
‐Ln
III
Heterometallic Complexes as Single‐Molecule Magnets. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201801428] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Amit Chakraborty
- Tata Institute of Fundamental Research Hyderabad Gopanpally 500107 Hyderabad India
| | - Joydeb Goura
- Department of Chemistry Indian Institute of Technology Kanpur 208016 Kanpur India
| | - Prasenjit Bag
- Department of Chemistry Indian Institute of Technology Kanpur 208016 Kanpur India
| | - Vadapalli Chandrasekhar
- Tata Institute of Fundamental Research Hyderabad Gopanpally 500107 Hyderabad India
- Department of Chemistry Indian Institute of Technology Kanpur 208016 Kanpur India
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76
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Hakey BM, Darmon JM, Zhang Y, Petersen JL, Milsmann C. Synthesis and Electronic Structure of Neutral Square-Planar High-Spin Iron(II) Complexes Supported by a Dianionic Pincer Ligand. Inorg Chem 2019; 58:1252-1266. [PMID: 30608668 DOI: 10.1021/acs.inorgchem.8b02730] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Two square-planar high-spin FeII complexes bearing a dianionic pyridine dipyrrolate pincer ligand and a diethyl ether or tetrahydrofuran ligand were synthesized and structurally characterized, and their electronic structures were elucidated by a combined spectroscopic and computational approach. In contrast to previous examples, the S = 2 ground states of these square-planar FeII complexes do not require an overall anionic charge of the compounds or incorporation of alkali metal cations. The tetrahydrofuran complex exhibits an equilibrium between four- and five-coordinate species in solution, which was supported by 1H NMR and 57Fe Mössbauer spectroscopy and comparison to a structurally characterized five-coordinate pyridine dipyrrolate iron bis-pyridine adduct. A detailed computational analysis of the electronic structures of the four- and five-coordinate species via density functional theory provides insight into the origins of the unusual ground state configurations for FeII in a square-planar ligand field and explains the associated characteristic spectroscopic parameters.
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Affiliation(s)
- Brett M Hakey
- C. Eugene Bennett Department of Chemistry , West Virginia University , 100 Prospect Street , Morgantown , West Virginia 26506 , United States
| | - Jonathan M Darmon
- Department of Chemistry , Princeton University , Princeton , New Jersey 08544 , United States
| | - Yu Zhang
- C. Eugene Bennett Department of Chemistry , West Virginia University , 100 Prospect Street , Morgantown , West Virginia 26506 , United States
| | - Jeffrey L Petersen
- C. Eugene Bennett Department of Chemistry , West Virginia University , 100 Prospect Street , Morgantown , West Virginia 26506 , United States
| | - Carsten Milsmann
- C. Eugene Bennett Department of Chemistry , West Virginia University , 100 Prospect Street , Morgantown , West Virginia 26506 , United States
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77
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Domenianni LI, Fligg R, Schäfermeier A, Straub S, Beerhues J, Sarkar B, Vöhringer P. Molecular and electronic structure of an azidocobalt(iii) complex derived from X-ray crystallography, linear spectroscopy and quantum chemical calculations. Phys Chem Chem Phys 2019; 21:20393-20402. [DOI: 10.1039/c9cp04350k] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
X-ray diffraction, UV/Vis electronic spectroscopy and Fourier-transform infrared spectroscopy are used with DFT and CAS calculations to explore the molecular and electronic structure of the cationic complex (cyclam)(diazido)cobalt(iii).
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Affiliation(s)
- Luis I. Domenianni
- Abteilung für Molekulare Physikalische Chemie
- Institut für Physikalische und Theoretische Chemie
- Rheinische Friedrich-Wilhelms-Universität
- 53115 Bonn
- Germany
| | - Reinhold Fligg
- Abteilung für Molekulare Physikalische Chemie
- Institut für Physikalische und Theoretische Chemie
- Rheinische Friedrich-Wilhelms-Universität
- 53115 Bonn
- Germany
| | - Annett Schäfermeier
- Abteilung für Molekulare Physikalische Chemie
- Institut für Physikalische und Theoretische Chemie
- Rheinische Friedrich-Wilhelms-Universität
- 53115 Bonn
- Germany
| | - Steffen Straub
- Abteilung für Molekulare Physikalische Chemie
- Institut für Physikalische und Theoretische Chemie
- Rheinische Friedrich-Wilhelms-Universität
- 53115 Bonn
- Germany
| | - Julia Beerhues
- Institut für Chemie und Biochemie
- Anorganische Chemie
- Freie Universität Berlin
- 14195 Berlin
- Germany
| | - Biprajit Sarkar
- Institut für Chemie und Biochemie
- Anorganische Chemie
- Freie Universität Berlin
- 14195 Berlin
- Germany
| | - Peter Vöhringer
- Abteilung für Molekulare Physikalische Chemie
- Institut für Physikalische und Theoretische Chemie
- Rheinische Friedrich-Wilhelms-Universität
- 53115 Bonn
- Germany
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78
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Wang HS, Yin CL, Hu ZB, Chen Y, Pan ZQ, Song Y, Zhang YQ, Zhang ZC. Regulation of magnetic relaxation behavior by replacing 3d transition metal ions in [M2Dy2] complexes containing two different organic chelating ligands. Dalton Trans 2019; 48:10011-10022. [DOI: 10.1039/c9dt00774a] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Two [MIII2DyIII2] complexes (M = Fe for 1 and Co for 2) with mixed organic ligands were obtained. Complex 2 exhibits single molecule magnet behavior with Ueff = 64.0(9) K.
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Affiliation(s)
- Hui-Sheng Wang
- School of Chemistry and Environmental Engineering
- Key Laboratory of Green Chemical Process of Ministry of Education
- Wuhan Institute of Technology
- Wuhan 430074
- P. R. China
| | - Cheng-Ling Yin
- School of Chemistry and Environmental Engineering
- Key Laboratory of Green Chemical Process of Ministry of Education
- Wuhan Institute of Technology
- Wuhan 430074
- P. R. China
| | - Zhao-Bo Hu
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Collaborative Innovation Center of Advanced Microstructures
- Nanjing University
- Nanjing 210046
| | - Yong Chen
- School of Chemistry and Environmental Engineering
- Key Laboratory of Green Chemical Process of Ministry of Education
- Wuhan Institute of Technology
- Wuhan 430074
- P. R. China
| | - Zhi-Quan Pan
- School of Chemistry and Environmental Engineering
- Key Laboratory of Green Chemical Process of Ministry of Education
- Wuhan Institute of Technology
- Wuhan 430074
- P. R. China
| | - You Song
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Collaborative Innovation Center of Advanced Microstructures
- Nanjing University
- Nanjing 210046
| | - Yi-Quan Zhang
- Jiangsu Key Laboratory for NSLSCS
- School of Physical Science and Technology
- Nanjing Normal University
- Nanjing 210023
- China
| | - Zai-Chao Zhang
- Jiangsu Key Laboratory for the Chemistry of Low-dimensional Materials
- School of Chemistry and Chemical Engineering
- Huaiyin Normal University
- P. R. China
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79
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Zykin MA, Eliseev AA, Pogosova MA, Trusov LA, Schnelle W, Felser C, Jansen M, Kazin PE. Impact of fluoride for hydroxide substitution on the magnetic properties of a Co-based single-ion magnet imbedded in the barium apatite crystal lattice. CrystEngComm 2019. [DOI: 10.1039/c8ce02042f] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The atomic group O–Co–O persists in the apatite channel and retains a high energy barrier for magnetization reversal.
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Affiliation(s)
- Mikhail A. Zykin
- Department of Materials Science
- Lomonosov Moscow State University
- 119991 Moscow
- Russia
| | - Artem A. Eliseev
- Department of Chemistry
- Lomonosov Moscow State University
- 119991 Moscow
- Russia
| | - Mariam A. Pogosova
- Center for Electrochemical Energy Storage
- Skolkovo Institute of Science and Technology
- 121205 Moscow
- Russia
| | - Lev A. Trusov
- Department of Chemistry
- Lomonosov Moscow State University
- 119991 Moscow
- Russia
| | - Walter Schnelle
- Max Planck Institute for Chemical Physics of Solids
- 01187 Dresden
- Germany
| | - Claudia Felser
- Max Planck Institute for Chemical Physics of Solids
- 01187 Dresden
- Germany
| | - Martin Jansen
- Max Planck Institute for Chemical Physics of Solids
- 01187 Dresden
- Germany
- Max Planck Institute for Solid State Research
- 70569 Stuttgart
| | - Pavel E. Kazin
- Department of Chemistry
- Lomonosov Moscow State University
- 119991 Moscow
- Russia
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80
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Yin CL, Hu ZB, Long QQ, Wang HS, Li J, Song Y, Zhang ZC, Zhang YQ, Pan ZQ. Single molecule magnet behaviors of Zn4Ln2 (Ln = DyIII, TbIII) complexes with multidentate organic ligands formed by absorption of CO2 in air through in situ reactions. Dalton Trans 2019; 48:512-522. [DOI: 10.1039/c8dt03849j] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Two novel Zn–Ln (Ln = Dy (1), Tb (2)) complexes showing single molecule magnet behaviors have been reported.
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Affiliation(s)
- Cheng-Ling Yin
- School of Chemistry and Environmental Engineering
- Key Laboratory of Green Chemical Process of Ministry of Education
- Wuhan Institute of Technology
- Wuhan 430074
- P. R. China
| | - Zhao-Bo Hu
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Collaborative Innovation Center of Advanced Microstructures
- Nanjing University
- Nanjing 210046
| | - Qiao-Qiao Long
- School of Chemistry and Environmental Engineering
- Key Laboratory of Green Chemical Process of Ministry of Education
- Wuhan Institute of Technology
- Wuhan 430074
- P. R. China
| | - Hui-Sheng Wang
- School of Chemistry and Environmental Engineering
- Key Laboratory of Green Chemical Process of Ministry of Education
- Wuhan Institute of Technology
- Wuhan 430074
- P. R. China
| | - Jing Li
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Collaborative Innovation Center of Advanced Microstructures
- Nanjing University
- Nanjing 210046
| | - You Song
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Collaborative Innovation Center of Advanced Microstructures
- Nanjing University
- Nanjing 210046
| | - Zai-Chao Zhang
- Jiangsu Key Laboratory for the Chemistry of Low-dimensional Materials
- School of Chemistry and Chemical Engineering
- Huaiyin Normal University
- P. R. China
| | - Yi-Quan Zhang
- Jiangsu Key Laboratory for NSLSCS
- School of Physical Science and Technology
- Nanjing Normal University
- Nanjing 210023
- China
| | - Zhi-Quan Pan
- School of Chemistry and Environmental Engineering
- Key Laboratory of Green Chemical Process of Ministry of Education
- Wuhan Institute of Technology
- Wuhan 430074
- P. R. China
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81
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Shi L, Shen FX, Shao D, Zhang YQ, Wang XY. Syntheses, structures, and magnetic properties of three two-dimensional cobalt(ii) single-ion magnets with a CoIIN4X2 octahedral geometry. CrystEngComm 2019. [DOI: 10.1039/c9ce00030e] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Three two-dimensional CoII SIMs with (4,4) layer structures have been synthesized and characterized structurally and magnetically.
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Affiliation(s)
- Le Shi
- State Key Laboratory of Coordination Chemistry
- Collaborative Innovation Center of Advanced Microstructures
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing
| | - Fu-Xing Shen
- State Key Laboratory of Coordination Chemistry
- Collaborative Innovation Center of Advanced Microstructures
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing
| | - Dong Shao
- State Key Laboratory of Coordination Chemistry
- Collaborative Innovation Center of Advanced Microstructures
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing
| | - Yi-Quan Zhang
- Jiangsu Key Laboratory for NSLSCS
- School of Physical Science and Technology
- Nanjing Normal University
- Nanjing 210023
- China
| | - Xin-Yi Wang
- State Key Laboratory of Coordination Chemistry
- Collaborative Innovation Center of Advanced Microstructures
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing
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82
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Cheng J, Chen Q, Leng X, Ouyang Z, Wang Z, Ye S, Deng L. The Stabilization of Three-Coordinate Formal Mn(0) Complex with NHC and Alkene Ligation. Chem 2018. [DOI: 10.1016/j.chempr.2018.09.002] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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83
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Nehrkorn J, Veber SL, Zhukas LA, Novikov VV, Nelyubina YV, Voloshin YZ, Holldack K, Stoll S, Schnegg A. Determination of Large Zero-Field Splitting in High-Spin Co(I) Clathrochelates. Inorg Chem 2018; 57:15330-15340. [PMID: 30495930 DOI: 10.1021/acs.inorgchem.8b02670] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Joscha Nehrkorn
- Department of Chemistry, Institute for Inorganic and Applied Chemistry, University of Hamburg, Martin-Luther-King-Platz 6, D-20146 Hamburg, Germany
- Department of Chemistry, University of Washington, Box 351700, Seattle, Washington 98195-1700, United States
- Berlin Joint EPR Laboratory, Institut für Nanospektroskopie, Helmholtz-Zentrum Berlin für Materialien und Energie, Kekuléstr. 5, D-12489 Berlin, Germany
- Max Planck Institute for Chemical Energy Conversion, Stiftstr. 34-36, D-45470 Mülheim an der Ruhr, Germany
| | - Sergey L. Veber
- International Tomography Center, Siberian Branch of the Russian Academy of Sciences, Institutskaya str. 3a, 630090 Novosibirsk, Russia
- Novosibirsk State University, Pirogova str. 1, 630090 Novosibirsk, Russia
| | - Liudmila A. Zhukas
- International Tomography Center, Siberian Branch of the Russian Academy of Sciences, Institutskaya str. 3a, 630090 Novosibirsk, Russia
- Novosibirsk State University, Pirogova str. 1, 630090 Novosibirsk, Russia
| | - Valentin V. Novikov
- Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilova str. 28, 119991 Moscow, Russia
| | - Yulia V. Nelyubina
- Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilova str. 28, 119991 Moscow, Russia
| | - Yan Z. Voloshin
- Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilova str. 28, 119991 Moscow, Russia
| | - Karsten Holldack
- Institut für Methoden und Instrumentierung der Forschung mit Synchrotronstrahlung, Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Str. 15, D-12489 Berlin, Germany
| | - Stefan Stoll
- Department of Chemistry, University of Washington, Box 351700, Seattle, Washington 98195-1700, United States
| | - Alexander Schnegg
- Berlin Joint EPR Laboratory, Institut für Nanospektroskopie, Helmholtz-Zentrum Berlin für Materialien und Energie, Kekuléstr. 5, D-12489 Berlin, Germany
- Max Planck Institute for Chemical Energy Conversion, Stiftstr. 34-36, D-45470 Mülheim an der Ruhr, Germany
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84
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Malladi S, Yarasi S, Sastry GN. Exploring the potential of iron to replace ruthenium in photosensitizers: a computational study. J Mol Model 2018; 24:341. [PMID: 30460519 DOI: 10.1007/s00894-018-3870-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2018] [Accepted: 10/31/2018] [Indexed: 12/30/2022]
Abstract
In an effort to replace the widely used ruthenium metal complexes with low-cost, earth abundant iron complexes as photosensitizers for dye-sensitized solar cell (DSSC) applications, herein we report the computational design of heteroleptic iron complexes (FC1-3) coordinated with benzimidazole-phenylcarbene (C^N) ligands. DFT and TDDFT calculations predicted the stronger σ-donating and π-accepting nature of phenyl carbene ligands substituted with electron-withdrawing CF3, donating -N(CH3)2, and benzothiazine annulation than the imidazole carbene ligands (FC4); consequently, the metal-ligand bond distances and interactions that influence the ordering of charge transfer states with respect to metal centered states are altered in FC1-3 complexes. Detailed analysis based on energy decomposition analysis, spin density distribution analysis, and ab initio ligand field theory parameters were enabled to understand the nature of heteroleptic ligand interactions with the rest of the metal complex. The results from the study shed light on the judicious choice of ligands, as the same non-innocent ligand that is experimentally proven as favorable for Ru-dyes (TC1) is found to be detrimental for Fe-dyes (FC1). Among the complexes studied, the FC3 complex is a promising sensitizer for DSSC with 1,3MLCT energy level well separated from 3,5MC, thereby preventing the deactivation of MLCT. The outcome of the study is therefore an important step toward the development of photosensitizers based on iron metal. Graphical abstract Potential photosensitzers based on earth-abundant, low cost iron metal have been designed for dye sensitized solar cell applications.
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Affiliation(s)
- Srikanth Malladi
- Center for Molecular Modeling, CSIR-Indian Institute of Chemical Technology, Hyderabad, 500007, India
| | - Soujanya Yarasi
- Center for Molecular Modeling, CSIR-Indian Institute of Chemical Technology, Hyderabad, 500007, India. .,AcSIR - Academy of Scientific and Innovative Research, New Delhi, India.
| | - G Narahari Sastry
- Center for Molecular Modeling, CSIR-Indian Institute of Chemical Technology, Hyderabad, 500007, India. .,AcSIR - Academy of Scientific and Innovative Research, New Delhi, India.
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85
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Bunting PC, Atanasov M, Damgaard-Møller E, Perfetti M, Crassee I, Orlita M, Overgaard J, van Slageren J, Neese F, Long JR. A linear cobalt(II) complex with maximal orbital angular momentum from a non-Aufbau ground state. Science 2018; 362:science.aat7319. [DOI: 10.1126/science.aat7319] [Citation(s) in RCA: 190] [Impact Index Per Article: 31.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Revised: 08/02/2018] [Accepted: 11/01/2018] [Indexed: 01/18/2023]
Abstract
Orbital angular momentum is a prerequisite for magnetic anisotropy, although in transition metal complexes it is typically quenched by the ligand field. By reducing the basicity of the carbon donor atoms in a pair of alkyl ligands, we synthesized a cobalt(II) dialkyl complex, Co(C(SiMe2ONaph)3)2 (where Me is methyl and Naph is a naphthyl group), wherein the ligand field is sufficiently weak that interelectron repulsion and spin-orbit coupling play a dominant role in determining the electronic ground state. Assignment of a non-Aufbau (dx2–y2, dxy)3(dxz, dyz)3(dz2)1 electron configuration is supported by dc magnetic susceptibility data, experimental charge density maps, and ab initio calculations. Variable-field far-infrared spectroscopy and ac magnetic susceptibility measurements further reveal slow magnetic relaxation via a 450–wave number magnetic excited state.
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Affiliation(s)
- Philip C. Bunting
- Department of Chemistry, University of California, Berkeley, CA 94720, USA
| | - Mihail Atanasov
- Max-Planck-Insitut für Kohlenforschung, Mülheim an der Ruhr D-45470, Germany
- Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, Academy Georgi Bontchev, Sofia 1113, Bulgaria
| | - Emil Damgaard-Møller
- Department of Chemistry and Centre for Materials Crystallography, Aarhus University, DK-8000 Aarhus C, Denmark
| | - Mauro Perfetti
- Institut für Physikalische Chemie and Center for Integrated Quantum Science and Technology (IQST), Universität Stuttgart, Pfaffenwaldring 55, 70569 Stuttgart, Germany
| | - Iris Crassee
- Univ. Grenoble Alpes, Laboratoire National des Champs Magnétiques Intenses, CNRS-UGA-UPS-INSA-EMFL, 25 rue des Martyrs, 38042 Grenoble, France
| | - Milan Orlita
- Univ. Grenoble Alpes, Laboratoire National des Champs Magnétiques Intenses, CNRS-UGA-UPS-INSA-EMFL, 25 rue des Martyrs, 38042 Grenoble, France
- Institute of Physics, Charles University, Ke Karlovu 5, 12116 Praha 2, Czech Republic
| | - Jacob Overgaard
- Department of Chemistry and Centre for Materials Crystallography, Aarhus University, DK-8000 Aarhus C, Denmark
| | - Joris van Slageren
- Institut für Physikalische Chemie and Center for Integrated Quantum Science and Technology (IQST), Universität Stuttgart, Pfaffenwaldring 55, 70569 Stuttgart, Germany
| | - Frank Neese
- Max-Planck-Insitut für Kohlenforschung, Mülheim an der Ruhr D-45470, Germany
| | - Jeffrey R. Long
- Department of Chemistry, University of California, Berkeley, CA 94720, USA
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, CA 94720, USA
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
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86
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Kintzel B, Böhme M, Liu J, Burkhardt A, Mrozek J, Buchholz A, Ardavan A, Plass W. Molecular electronic spin qubits from a spin-frustrated trinuclear copper complex. Chem Commun (Camb) 2018; 54:12934-12937. [PMID: 30302454 DOI: 10.1039/c8cc06741d] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The trinuclear copper(ii) complex [Cu3(saltag)(py)6]ClO4 (H5saltag = tris(2-hydroxybenzylidene)triaminoguanidine) was synthesized and characterized by experimental as well as theoretical methods. This complex exhibits a strong antiferromagnetic coupling (J = -298 cm-1) between the copper(ii) ions, mediated by the N-N diazine bridges of the tritopic ligand, leading to a spin-frustrated system. This compound shows a T2 coherence time of 340 ns in frozen pyridine solution, which extends to 591 ns by changing the solvent to pyridine-d5. Hence, the presented compound is a promising candidate as a building block for molecular spintronics.
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Affiliation(s)
- Benjamin Kintzel
- Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, Humboldtstraße 8, 07745 Jena, Germany.
| | - Michael Böhme
- Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, Humboldtstraße 8, 07745 Jena, Germany.
| | - Junjie Liu
- The Clarendon Laboratory, Department of Physics, University of Oxford, Oxford OX1 3PU, UK
| | - Anja Burkhardt
- Photon Science, DESY, Notkestrasse 85, 22607 Hamburg, Germany
| | - Jakub Mrozek
- The Clarendon Laboratory, Department of Physics, University of Oxford, Oxford OX1 3PU, UK
| | - Axel Buchholz
- Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, Humboldtstraße 8, 07745 Jena, Germany.
| | - Arzhang Ardavan
- The Clarendon Laboratory, Department of Physics, University of Oxford, Oxford OX1 3PU, UK
| | - Winfried Plass
- Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, Humboldtstraße 8, 07745 Jena, Germany.
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87
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Maxwell L, Amoza M, Ruiz E. Mononuclear Lanthanide Complexes with 18-Crown-6 Ether: Synthesis, Characterization, Magnetic Properties, and Theoretical Studies. Inorg Chem 2018; 57:13225-13234. [DOI: 10.1021/acs.inorgchem.8b01688] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Lindley Maxwell
- Departament de Química Inorgànica i Orgànica and Institut de Recerca de Química Teòrica i Computacional, Universitat de Barcelona, Diagonal 645, E-08028 Barcelona, Spain
- Advanced Lithium and Industrial Minerals Research Center, Universidad de Antofagasta, Avenida Universidad de Antofagasta, 02800 Antofagasta, Chile
| | - Martín Amoza
- Departament de Química Inorgànica i Orgànica and Institut de Recerca de Química Teòrica i Computacional, Universitat de Barcelona, Diagonal 645, E-08028 Barcelona, Spain
| | - Eliseo Ruiz
- Departament de Química Inorgànica i Orgànica and Institut de Recerca de Química Teòrica i Computacional, Universitat de Barcelona, Diagonal 645, E-08028 Barcelona, Spain
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88
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Dey A, Kalita P, Chandrasekhar V. Lanthanide(III)-Based Single-Ion Magnets. ACS OMEGA 2018; 3:9462-9475. [PMID: 31459081 PMCID: PMC6644820 DOI: 10.1021/acsomega.8b01204] [Citation(s) in RCA: 84] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Accepted: 08/03/2018] [Indexed: 05/27/2023]
Abstract
Mononuclear lanthanide-based single-ion magnets (SIMs) are known since 2003 with the discovery of SIM properties in a bis-(phthalocyaninato)lanthanide complex. A recent report on [Dy(Cpttt)2][BC6F5] indicating that it exhibits the highest known blocking temperature (60 K) has spurred fresh interest in this area. In this article, we discuss about the various requirements of lanthanide-based SIMs along with representative examples. Specifically, we describe the complexes whose coordination numbers vary from 2 to 8. We also discuss the representative examples of organometallic lanthanide complexes that can function as molecular magnets.
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Affiliation(s)
- Atanu Dey
- Tata
Institute of Fundamental Research Hyderabad, Hyderabad 500107, India
| | - Pankaj Kalita
- School
of Chemical Sciences, National Institute of Science Education and
Research, HBNI, Bhubaneswar 752050, India
| | - Vadapalli Chandrasekhar
- Tata
Institute of Fundamental Research Hyderabad, Hyderabad 500107, India
- Department
of Chemistry, Indian Institute of Technology
Kanpur, Kanpur 208016, India
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89
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Vignesh KR, Langley SK, Gartshore CJ, Borilović I, Forsyth CM, Rajaraman G, Murray KS. Rationalizing the sign and magnitude of the magnetic coupling and anisotropy in dinuclear manganese(iii) complexes. Dalton Trans 2018; 47:11820-11833. [PMID: 29951677 DOI: 10.1039/c8dt01410h] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
We have synthesised twelve manganese(iii) dinuclear complexes, 1-12, in order to understand the origin of magnetic exchange (J) between the metal centres and the magnetic anisotropy (D) of each metal ion using a combined experimental and theoretical approach. All twelve complexes contain the same bridging ligand environment of one μ-oxo and two μ-carboxylato, that helped us to probe how the structural parameters, such as bond distance, bond angle and especially Jahn-Teller dihedral angle affect the magnetic behaviour. Among the twelve complexes, we found ferromagnetic coupling for five and antiferromagnetic coupling for seven. DFT computed the J and ab initio methods computed the D parameter, and are in general agreement with the experimentally determined values. The dihedral angle between the two Jahn-Teller axes of the constituent MnIII ions are found to play a key role in determining the sign of the magnetic coupling. Magneto-structural correlations are developed by varying the Mn-O distance and the Mn-O-Mn angle to understand how the magnetic coupling changes upon these structural changes. Among the developed correlations, the Mn-O distance is found to be the most sensitive parameter that switches the sign of the magnetic coupling from negative to positive. The single-ion zero-field splitting of the MnIII centres is found to be negative for complexes 1-11 and positive for complex 12. However, the zero-field splitting of the S = 4 state for the ferromagnetic coupled dimers is found to be positive, revealing a significant contribution from the exchange anisotropy - a parameter which has long been ignored as being too small to be effective.
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90
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Vasquez
Jaramillo JD, Hammar H, Fransson J. Electronically Mediated Magnetic Anisotropy in Vibrating Magnetic Molecules. ACS OMEGA 2018; 3:6546-6553. [PMID: 31458831 PMCID: PMC6644657 DOI: 10.1021/acsomega.8b00449] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/09/2018] [Accepted: 05/10/2018] [Indexed: 06/10/2023]
Abstract
We address the electronically induced anisotropy field acting on a spin moment in a vibrating magnetic molecule located in the junction between ferromagnetic metals. Under weak coupling between the electrons and molecular vibrations, the nature of the anisotropy can be changed from favoring a high spin (easy-axis) magnetic moment to a low spin (easy plane) by applying a temperature difference or a voltage bias across the junction. For unequal spin polarizations in ferromagnetic metals, it is shown that the character of the anisotropy is essentially determined by the properties of the weaker ferromagnet. By increasing the temperature in this metal or introducing a voltage bias, its influence can be suppressed such that the dominant contribution to the anisotropy is interchanged to the stronger ferromagnet. With increasing coupling strength between the molecular vibrations and the electrons, the nature of the anisotropy is locked into favoring easy-plane magnetism.
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91
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Craven M, Nygaard MH, Zadrozny JM, Long JR, Overgaard J. Determination of d-Orbital Populations in a Cobalt(II) Single-Molecule Magnet Using Single-Crystal X-ray Diffraction. Inorg Chem 2018; 57:6913-6920. [PMID: 29862809 DOI: 10.1021/acs.inorgchem.8b00513] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The tetrahedral cobalt(II) compound (Ph4P)2[Co(SPh)4] was the first mononuclear transition-metal complex shown to exhibit slow relaxation of the magnetization in zero external magnetic field. Because the relative populations of the d orbitals play a vital role in dictating the magnitude of the magnetic anisotropy, the magnetic behavior of this complex is directly related to its electronic structure, yet the exact role of the soft, thiophenolate ligands in influencing the d-electron configuration has previously only been investigated via theoretical methods. To provide detailed experimental insight into the effect of this ligand field, the electron density distribution in this compound was determined from low-temperature, single-crystal X-ray diffraction data and subsequent multipole modeling. Topological analysis of the electron density indicates significant covalent contributions to the cobalt-sulfur bonds. The derived d-orbital populations further reveal a fully occupied d z2 orbital, minor d xz orbital population, and nearly equal population of the d xy, d x2- y2, and d yz orbitals. Notably, we find that an electrostatic interaction between Co(II) and one hydrogen atom from a thiophenolate group in the xz plane increases the energy of the d x2- y2 orbital, leading to the nearly equal population with d xy and strong magnetic anisotropy.
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Affiliation(s)
- Matthew Craven
- Department of Chemistry , Aarhus University , Langelandsgade 140 , DK-8000 Aarhus C , Denmark
| | - Mathilde H Nygaard
- Department of Chemistry , Aarhus University , Langelandsgade 140 , DK-8000 Aarhus C , Denmark
| | | | - Jeffrey R Long
- Materials Sciences Division , Lawrence Berkeley National Laboratory , Berkeley , California 94720 , United States
| | - Jacob Overgaard
- Department of Chemistry , Aarhus University , Langelandsgade 140 , DK-8000 Aarhus C , Denmark
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92
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Van Stappen C, Maganas D, DeBeer S, Bill E, Neese F. Investigations of the Magnetic and Spectroscopic Properties of V(III) and V(IV) Complexes. Inorg Chem 2018; 57:6421-6438. [DOI: 10.1021/acs.inorgchem.8b00486] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Casey Van Stappen
- Max-Planck Institute for Chemical Energy Conversion, Stiftstrasse 34-36, Mülheim an der Ruhr, 45470 North Rhine-Westphalia, Germany
| | - Dimitrios Maganas
- Max-Planck-Institüt für Kohlenforschung, Kaiser-Wilhelm-Platz 1, Mülheim an der Ruhr, 45470 North Rhine-Westphalia, Germany
| | - Serena DeBeer
- Max-Planck Institute for Chemical Energy Conversion, Stiftstrasse 34-36, Mülheim an der Ruhr, 45470 North Rhine-Westphalia, Germany
| | - Eckhard Bill
- Max-Planck-Institüt für Kohlenforschung, Kaiser-Wilhelm-Platz 1, Mülheim an der Ruhr, 45470 North Rhine-Westphalia, Germany
| | - Frank Neese
- Max-Planck-Institüt für Kohlenforschung, Kaiser-Wilhelm-Platz 1, Mülheim an der Ruhr, 45470 North Rhine-Westphalia, Germany
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93
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Switlicka A, Machura B, Kruszynski R, Cano J, Toma LM, Lloret F, Julve M. The influence of pseudohalide ligands on the SIM behaviour of four-coordinate benzylimidazole-containing cobalt(ii) complexes. Dalton Trans 2018; 47:5831-5842. [PMID: 29648565 DOI: 10.1039/c7dt04735e] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Three, mononuclear complexes of the formula [Co(bmim)2(SCN)2] (1), [Co(bmim)2(NCO)2] (2) and [Co(bmim)2(N3)2] (3) [bmim = 1-benzyl-2-methylimidazole] were prepared and structurally analyzed by single-crystal X-ray crystallography. The cobalt(ii) ions in 1-3 are tetrahedrally coordinated with two bmim molecules and two pseudohalide anions. The angular distortion parameter δ was calculated and the SHAPE program (based on the CShM concept) was used for 1-3 to estimate the angular distortion from an ideal tetrahedron. The molecules of 1-3 are effectively separated, and the values of the shortest distance of cobalt-cobalt are 8.442(6) and 6.774(8) Å for 1, 10.349(8) and 10.716(8) Å for 2 and 6.778(1) and 9.232(1) Å for 3. Direct current (dc) magnetic susceptibility measurements on the crushed crystals of 1-3 were carried out in the temperature range 1.9-295 K. The variable-temperature magnetic data of 1-3 mainly obey the zero-field splitting effect (D) of the 4A2 ground term of the tetrahedral cobalt(ii) complexes (2D being the energy gap between the |±1/2 and |±3/2 levels of the spin). The analysis of their magnetic data through the Hamiltonian H = D[S2z - S(S + 1)/3] + E(Sx2 - Sy2) + gβHS led to the following best-fit parameters: g = 2.29, D = -7.5 cm-1 and E/D = 0.106 (1), g = 2.28, D = + 6.3 cm-1 and E/D = 0.007 (2) and g = 2.36, D = + 6.7 cm-1 and E/D = 0.090 (3). The signs of D for 1-3 were confirmed by Q-band EPR spectra on powdered samples in the temperature range 4.0-20 K. Field-induced SIM behaviour was observed for 1-3 below 4.0 K, and the frequency-dependent maxima of χ''M were observed for 1 and only incipient signals of χ''M occurred for 2 and 3. The values of the exponential factor (τ0) and activation energy (Ea) for 1-3 which were obtained from the Arrhenius plot suggest a single relaxation process characteristic of an Orbach mechanism.
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Affiliation(s)
- A Switlicka
- Department of Crystallography, Institute of Chemistry, University of Silesia, 9th Szkolna St., 40-006 Katowice, Poland.
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94
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Liu JL, Chen YC, Tong ML. Symmetry strategies for high performance lanthanide-based single-molecule magnets. Chem Soc Rev 2018; 47:2431-2453. [PMID: 29492482 DOI: 10.1039/c7cs00266a] [Citation(s) in RCA: 628] [Impact Index Per Article: 104.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Toward promising candidates of quantum information processing, the rapid development of lanthanide-based single-molecule magnets (Ln-SMMs) highlights design strategies in consideration of the local symmetry of lanthanide ions. In this review, crystal-field theory is employed to demonstrate the electronic structures according to the semiquantitative electrostatic model. Then, specific symmetry elements are analysed for the elimination of transverse crystal fields and quantum tunnelling of magnetization (QTM). In this way, high-performance Ln-SMMs can be designed to enable extremely slow relaxation of magnetization, namely magnetic blocking; however, their practical magnetic characterization becomes increasingly challenging. Therefore, we will attempt to interpret the experimental behaviours and clarify some issues in detail. Finally, representative Ln-SMMs with specific local symmetries are summarized in combination with the discussion on the symmetry strategies, and some of the underlying questions are put forward.
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Affiliation(s)
- Jun-Liang Liu
- MOE Key Lab of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, P. R. China.
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95
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Hosseinnejad T, Ebrahimpour-Malmir F, Fattahi B. Computational investigations of click-derived 1,2,3-triazoles as keystone ligands for complexation with transition metals: a review. RSC Adv 2018; 8:12232-12259. [PMID: 35539398 PMCID: PMC9079615 DOI: 10.1039/c8ra00283e] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2018] [Revised: 01/04/2019] [Accepted: 03/02/2018] [Indexed: 01/05/2023] Open
Abstract
In recent years, metal complexes of organo 1,2,3-triazole click-derived ligands have attracted significant attention as catalysts in many chemical transformations and also as biological and pharmaceutical active agents. Regarding the important applications of these metal-organo 1,2,3-triazole-based complexes, in this review, we focused on the recently reported investigations of the structural, electronic, and spectroscopic aspects of the complexation process in transition metal complexes of 1,2,3-triazole-based click ligands. In line with this, the coordination properties of these triazole-based click ligands with transition metals were studied via several quantum chemistry calculations. Moreover, considering the complexation process, we have presented comparative discussions between the computational results and the available experimental data.
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Affiliation(s)
- Tayebeh Hosseinnejad
- Department of Chemistry, Faculty of Physics & Chemistry, Alzahra University Vanak Tehran Iran +98-21-8804-1344 +98-9124775800
| | - Fatemeh Ebrahimpour-Malmir
- Department of Chemistry, Faculty of Physics & Chemistry, Alzahra University Vanak Tehran Iran +98-21-8804-1344 +98-9124775800
| | - Bahareh Fattahi
- Department of Chemistry, Faculty of Physics & Chemistry, Alzahra University Vanak Tehran Iran +98-21-8804-1344 +98-9124775800
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96
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Jin XX, Chen XX, Xiang J, Chen YZ, Jia LH, Wang BW, Cheng SC, Zhou X, Leung CF, Gao S. Slow Magnetic Relaxation in a Series of Mononuclear 8-Coordinate Fe(II) and Co(II) Complexes. Inorg Chem 2018. [PMID: 29521502 DOI: 10.1021/acs.inorgchem.7b03071] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A series of homoleptic mononuclear 8-coordinate FeII and CoII compounds, [FeII(L2)2](ClO4)2 (2), [FeII(L3)2](ClO4)2 (3), [FeII(L4)2](ClO4)2 (4), [CoII(L1)2](ClO4)2 (5), [CoII(L2)2](ClO4)2 (6), [CoII(L3)2](ClO4)2 (7), and [CoII(L4)2](ClO4)2 (8) (L1 and L2 are 2,9-dialkylcarboxylate-1,10-phenanthroline ligands; L3 and L4 are 6,6'-dialkylcarboxylate-2,2'-bipyridine ligands), have been obtained, and their crystal structures have been determined by X-ray crystallography. The metal center in all of these compounds has an oversaturated coordination number of 8, which is completed by two neutral homoleptic tetradentate ligands and is unconventional in 3d-metal compounds. These compounds are further characterized by electronic spectroscopy, cyclic voltammetry (CV), and magnetic measurements. CV measurements of these complexes in MeCN solution exhibit rich redox properties. Magnetic measurements on these compounds demonstrate that the observed single-ion magnetic (SIM) behavior in the previously reported [FeII(L1)2](ClO4)2 (1) is not a contingent case, since all of the 8-coordinate compounds 2-8 exhibit interesting slow magnetic relaxation under applied direct current fields.
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Affiliation(s)
- Xin-Xin Jin
- College of Chemistry and Environmental Engineering , Yangtze University , Jingzhou 434020 , HuBei , P. R. China
| | - Xiao-Xiang Chen
- State Key Laboratory of Rare Earth Materials Chemistry and Applications and PKU-HKU Joint Laboratory on Rare Earth Materials and Bioinorganic Chemistry , Peking University , Beijing 100871 , P. R. China
| | - Jing Xiang
- College of Chemistry and Environmental Engineering , Yangtze University , Jingzhou 434020 , HuBei , P. R. China
| | - Yun-Zhou Chen
- School of Chemistry and Environmental Engineering , Wuhan Institute of Technology , Wuhan 430073 , P. R. China
| | - Li-Hui Jia
- School of Chemistry and Environmental Engineering , Wuhan Institute of Technology , Wuhan 430073 , P. R. China
| | - Bing-Wu Wang
- State Key Laboratory of Rare Earth Materials Chemistry and Applications and PKU-HKU Joint Laboratory on Rare Earth Materials and Bioinorganic Chemistry , Peking University , Beijing 100871 , P. R. China
| | - Shun-Cheung Cheng
- Department of Chemistry , City University of Hong Kong , Tat Chee Avenue, Kowloon Tong , Hong Kong 999077 , P. R. China
| | - Xin Zhou
- College of Chemistry and Environmental Engineering , Yangtze University , Jingzhou 434020 , HuBei , P. R. China
| | - Chi-Fai Leung
- Department of Science and Environmental Studies , The Education University of Hong Kong , 10 Lo Ping Road, Tai Po, NT , Hong Kong 999077 , P. R. China
| | - Song Gao
- State Key Laboratory of Rare Earth Materials Chemistry and Applications and PKU-HKU Joint Laboratory on Rare Earth Materials and Bioinorganic Chemistry , Peking University , Beijing 100871 , P. R. China
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97
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Craig GA, Sarkar A, Woodall CH, Hay MA, Marriott KER, Kamenev KV, Moggach SA, Brechin EK, Parsons S, Rajaraman G, Murrie M. Probing the origin of the giant magnetic anisotropy in trigonal bipyramidal Ni(ii) under high pressure. Chem Sci 2018; 9:1551-1559. [PMID: 29675200 PMCID: PMC5890327 DOI: 10.1039/c7sc04460g] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2017] [Accepted: 12/18/2017] [Indexed: 11/30/2022] Open
Abstract
Understanding and controlling magnetic anisotropy at the level of a single metal ion is vital if the miniaturisation of data storage is to continue to evolve into transformative technologies. Magnetic anisotropy is essential for a molecule-based magnetic memory as it pins the magnetic moment of a metal ion along the easy axis. Devices will require deposition of magnetic molecules on surfaces, where changes in molecular structure can significantly alter magnetic properties. Furthermore, if we are to use coordination complexes with high magnetic anisotropy as building blocks for larger systems we need to know how magnetic anisotropy is affected by structural distortions. Here we study a trigonal bipyramidal nickel(ii) complex where a giant magnetic anisotropy of several hundred wavenumbers can be engineered. By using high pressure, we show how the magnetic anisotropy is strongly influenced by small structural distortions. Using a combination of high pressure X-ray diffraction, ab initio methods and high pressure magnetic measurements, we find that hydrostatic pressure lowers both the trigonal symmetry and axial anisotropy, while increasing the rhombic anisotropy. The ligand-metal-ligand angles in the equatorial plane are found to play a crucial role in tuning the energy separation between the d x2-y2 and d xy orbitals, which is the determining factor that controls the magnitude of the axial anisotropy. These results demonstrate that the combination of high pressure techniques with ab initio studies is a powerful tool that gives a unique insight into the design of systems that show giant magnetic anisotropy.
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Affiliation(s)
- Gavin A Craig
- WestCHEM , School of Chemistry , University of Glasgow , Glasgow , G12 8QQ , UK .
| | - Arup Sarkar
- Department of Chemistry , Indian Institute of Technology Bombay , Powai , Mumbai , Maharashtra 400 076 , India .
| | - Christopher H Woodall
- Centre for Science at Extreme Conditions , University of Edinburgh , Edinburgh , EH9 3FD , UK .
- EaStCHEM , School of Chemistry , University of Edinburgh , Edinburgh , EH9 3FJ , UK
| | - Moya A Hay
- WestCHEM , School of Chemistry , University of Glasgow , Glasgow , G12 8QQ , UK .
| | - Katie E R Marriott
- WestCHEM , School of Chemistry , University of Glasgow , Glasgow , G12 8QQ , UK .
| | - Konstantin V Kamenev
- Centre for Science at Extreme Conditions , University of Edinburgh , Edinburgh , EH9 3FD , UK .
- EaStCHEM , School of Chemistry , University of Edinburgh , Edinburgh , EH9 3FJ , UK
| | - Stephen A Moggach
- Centre for Science at Extreme Conditions , University of Edinburgh , Edinburgh , EH9 3FD , UK .
- EaStCHEM , School of Chemistry , University of Edinburgh , Edinburgh , EH9 3FJ , UK
| | - Euan K Brechin
- Centre for Science at Extreme Conditions , University of Edinburgh , Edinburgh , EH9 3FD , UK .
- EaStCHEM , School of Chemistry , University of Edinburgh , Edinburgh , EH9 3FJ , UK
| | - Simon Parsons
- Centre for Science at Extreme Conditions , University of Edinburgh , Edinburgh , EH9 3FD , UK .
- EaStCHEM , School of Chemistry , University of Edinburgh , Edinburgh , EH9 3FJ , UK
| | - Gopalan Rajaraman
- Department of Chemistry , Indian Institute of Technology Bombay , Powai , Mumbai , Maharashtra 400 076 , India .
| | - Mark Murrie
- WestCHEM , School of Chemistry , University of Glasgow , Glasgow , G12 8QQ , UK .
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98
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Chew KH, Kuwahara R, Ohno K. First-principles study on the atomistic corrosion processes of iron. Phys Chem Chem Phys 2018; 20:1653-1663. [PMID: 29261192 DOI: 10.1039/c7cp04022a] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The corrosion of iron presents an important scientific problem and a serious economic issue. It is also one of the most important subjects in materials science because it is basically an electrochemical process and closely related to other topics such as the electrocatalysis of the oxygen reduction reaction. So far, many studies have been conducted to address the corrosion of iron, a very complicated process that occurs when iron is exposed to oxygen and water. An important question is, at which site of the iron surface the corrosion starts and how it results in the final stage of the corrosion. In the present study, as an example of superficial defects, Fe dimers sticking out of Fe(100) surfaces are considered in order to understand the iron corrosion process from first-principles using density functional theory. We found that the Fe dimers spontaneously react with O2 and H2O to form Fe2(OH)4 + 4OH-. Here, it is interesting to note that the Fe dimer plays the role of a water splitting catalyst, because the space above it is always vacant and can accept oxygen molecules many times for reacting with the surrounding water molecules. Then, if the Fe2(OH)4 molecules are detached from the surface, they react with O2 to form Fe2O(OH)4 without an activation barrier, and, in turn, the Fe2O(OH)4 and H2O molecules react to form Fe2(OH)6 complexes with an activation energy of 0.653 eV. If these complexes further dissociate into Fe(OH)3 molecules, they react with each other to form Fe2O3·2H2O with an activation energy of 0.377 eV. This work may provide useful information on possible iron corrosion processes by water in the air.
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Affiliation(s)
- Khian-Hooi Chew
- Department of Physics, Yokohama National University, 79-5 Tokiwadai, Hogogaya-ku, Yokohama 240-8501, Japan.
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99
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Coughtrie DJ, Giereth R, Kats D, Werner HJ, Köhn A. Embedded Multireference Coupled Cluster Theory. J Chem Theory Comput 2018; 14:693-709. [DOI: 10.1021/acs.jctc.7b01144] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- David J. Coughtrie
- Institute for Theoretical
Chemistry, University of Stuttgart, 70569 Stuttgart, Germany
| | - Robin Giereth
- Institute for Theoretical
Chemistry, University of Stuttgart, 70569 Stuttgart, Germany
| | - Daniel Kats
- Institute for Theoretical
Chemistry, University of Stuttgart, 70569 Stuttgart, Germany
| | - Hans-Joachim Werner
- Institute for Theoretical
Chemistry, University of Stuttgart, 70569 Stuttgart, Germany
| | - Andreas Köhn
- Institute for Theoretical
Chemistry, University of Stuttgart, 70569 Stuttgart, Germany
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100
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Effect of Low Spin Excited States for Magnetic Anisotropy of Transition Metal Mononuclear Single Molecule Magnets. INORGANICS 2018. [DOI: 10.3390/inorganics6010024] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Rational, fine tuning of magnetic anisotropy is critical to obtain new coordination compounds with enhanced single molecule magnet properties. For mononuclear transition metal complexes, the largest contribution to zero-field splitting is usually related to the excited states of the same spin as the ground level. Thus, the contribution of lower multiplicity roots tends to be overlooked due to its lower magnitude. In this article, we explore the role of lower multiplicity excited states in zero-field splitting parameters in model structures of Fe(II) and Co(II). Model aquo complexes with coordination numbers ranging from 2 to 6 were constructed. The magnetic anisotropy was calculated by state of the art ab initio methodologies, including spin-orbit coupling effects. For non-degenerate ground states, contributions to the zero-field splitting parameter (D) from highest and lower multiplicity roots were of the same sign. In addition, their relative magnitude was in a relatively narrow range, irrespective of the coordination geometry. For degenerate ground states, the contribution from lower multiplicity roots was significantly smaller. Results are rationalized in terms of general expressions for D and are expected to be reasonably transferable to real molecular systems.
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