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Lippi M, Wadepohl H, Comba P, Cametti M. A Bispidine based CuII/ZnII Heterobimetallic Coordination Polymer. Eur J Inorg Chem 2022. [DOI: 10.1002/ejic.202200221] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Martina Lippi
- Politecnico di Milano Department of Chemistry, Materials and Chemical Engineering ITALY
| | - Hubert Wadepohl
- Heidelberg University Interdisciplinary Center of Scientific Computing GERMANY
| | - Peter Comba
- Heidelberg University Anorganisch-Chemisches Institut GERMANY
| | - Massimo Cametti
- Politecnico di Milano Dipartimento di Chimica, Materiali ed Ingegneria Chimica Via Luigi Mancinelli 7 20131 Milano ITALY
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2
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Nonat AM, Roux A, Sy M, Charbonnière LJ. 2,4-Substituted bispidines as rigid hosts for versatile applications: from κ-opioid receptor to metal coordination. Dalton Trans 2019; 48:16476-16492. [DOI: 10.1039/c9dt03480c] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Bispidines and their applications in medicine, catalysis, magnetism and medical imaging: what do we know about the influence of substituents?
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Affiliation(s)
- Aline M. Nonat
- Equipe de Synthèse pour l'Analyse (SynPA)
- Institut Pluridisciplinaire Hubert Curien (IPHC
- UMR 7178)
- CNRS/Université de Strasbourg
- ECPM
| | - Amandine Roux
- Equipe de Synthèse pour l'Analyse (SynPA)
- Institut Pluridisciplinaire Hubert Curien (IPHC
- UMR 7178)
- CNRS/Université de Strasbourg
- ECPM
| | - Maryame Sy
- Equipe de Synthèse pour l'Analyse (SynPA)
- Institut Pluridisciplinaire Hubert Curien (IPHC
- UMR 7178)
- CNRS/Université de Strasbourg
- ECPM
| | - Loïc J. Charbonnière
- Equipe de Synthèse pour l'Analyse (SynPA)
- Institut Pluridisciplinaire Hubert Curien (IPHC
- UMR 7178)
- CNRS/Université de Strasbourg
- ECPM
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3
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Fraser HWL, Smythe L, Dey S, Nichol GS, Piligkos S, Rajaraman G, Brechin EK. A simple methodology for constructing ferromagnetically coupled Cr(iii) compounds. Dalton Trans 2018; 47:8100-8109. [PMID: 29877529 DOI: 10.1039/c8dt01963k] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A large family of chromium(iii) dimers has been synthesised and magneto-structurally characterised using a combination of carboxylate and diethanolamine type ligands. The compounds have the general formula [Cr2(R1-deaH)2(O2CR2)Cl2]Cl where R1 = Me and R2 = H (1), Me (2), CMe3 (3), Ph (4), 3,5-(Cl)2Ph (5), (Me)5Ph (6), R1 = Et and R2 = H (7), Ph (8). The compound [Cr2(Me-deaH)2Cl4] (9) was synthesised in order to study the effect of removing/adding the carboxylate bridge on the observed magnetic behaviour. Direct current (DC) magnetic susceptibility measurements showed ferromagnetic (FM) exchange interactions between the Cr(iii) centres in the carboxylate bridged family with coupling constants in the range +0.37 < J < +8.02 cm-1. Removal of the carboxylate to produce the dialkoxide-bridged compound 9 resulted in antiferromagnetic (AFM) exchange between the Cr(iii) ions. DFT calculations reveal the ferromagnetic exchange is the result of an orbital counter-complementarity effect occuring upon introduction of the bridging carboxylate.
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Affiliation(s)
- Hector W L Fraser
- EaStCHEM School of Chemistry, The University of Edinburgh, David Brewster Road, Edinburgh, EH9 3FJ Scotland, UK.
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4
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Oliveira WXC, Pereira CLM, Pinheiro CB, Lloret F, Julve M. Oxotris(oxalate)niobate(V): An oxalate delivery agent in the design of building blocks. J COORD CHEM 2018. [DOI: 10.1080/00958972.2018.1428313] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Willian X. C. Oliveira
- Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Cynthia L. M. Pereira
- Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Carlos B. Pinheiro
- Departamento de Física, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Francesc Lloret
- Departamento de Química Inorgánica, Instituto de Ciencia Molecular (ICMol), Universitat de València, València, Spain
| | - Miguel Julve
- Departamento de Química Inorgánica, Instituto de Ciencia Molecular (ICMol), Universitat de València, València, Spain
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5
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Singh SK, Vignesh KR, Archana V, Rajaraman G. Theoretical insights into the origin of magnetic exchange and magnetic anisotropy in {Re(IV)-M(II)} (M = Mn, Fe, Co, Ni and Cu) single chain magnets. Dalton Trans 2017; 45:8201-14. [PMID: 27096553 DOI: 10.1039/c5dt04928h] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Density functional calculations have been performed on a series of {Re(IV)-M(II)} (M = Mn(), Fe(), Co(), Ni(), Cu()) complexes to compute the magnetic exchange interaction between the Re(IV) and M(II) ions, and understand the mechanism of magnetic coupling in this series. DFT calculations yield J values of -5.54 cm(-1), +0.44 cm(-1), +10.5 cm(-1), +4.54 cm(-1) and +19 cm(-1) for complexes respectively, and these estimates are in general agreement with the experimental reports. Using molecular orbital (MO) and overlap integral analysis, we have established a mechanism of coupling for a {3d-5d} pair and the proposed mechanism rationalises both the sign and the magnitude of J values observed in this series. Our proposed mechanism of coupling has five contributing factors: (i) (Re)dyz-dyz(3d) overlap, (ii) (Re)dxz-dxz(3d) overlap, (iii) (Re)dxy-dxy(3d) overlap, (iv) (Re)eg-t2g(3d) overlaps and (v) (Re)eg-eg(3d) overlaps. Here, the first two terms are found to contribute to the antiferromagnetic part of the exchange, while the other three contribute to the ferromagnetic part. The last two terms correspond to the cross-interactions and also contribute to the ferromagnetic part of the exchange. A record high ferromagnetic J value observed for the {Re(IV)-Cu(II)} pair in complex is found to be due to a significant cross interaction between the dz(2) orbital of the Re(IV) ion and the dx(2)-y(2) orbital of the Cu(ii) ion. Magneto-structural correlations are developed for Re-C and M-N bond lengths and Re-C-N and M-N-C bond angles. Among the developed correlations, the M-N-C bond angle is found to be the most sensitive parameter which influences the sign and strength of J values in this series. The J values are found to be more positive (or less negative) as the angle increases, indicating stronger ferromagnetic coupling at linear M-N-C angles. Apart from the magnetic exchange interaction, we have also estimated the magnetic anisotropy of [ReCl4(CN)2](2-) and [(DMF)4(CN)M(II)(CN)] (M(II)-Fe(II), Co(II) and Ni(II)) units using the state-of-the-art ab initio CASSCF/PT2/RASSI-SO/SINGLE_ANISO approach. The calculated D and E values for these building units are found to be in agreement with the available experimental results. Particularly a large positive D computed for the [ReCl4(CN)2](2-) unit was found to arise from dxz/dyz → dxy excitations corresponding to the low-lying doublet states. Similarly, a very large positive D value computed for Fe(II) and Co(II) units are also rationalised based on the corresponding ground state electronic configurations computed. The non-collinearity of the Re(IV) ion and the M(II) ion axial anisotropy (DZZ) axis are found to diminish the anisotropy of the building unit, leading to the observation of moderate relaxation barriers for these molecules.
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Affiliation(s)
- Saurabh Kumar Singh
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai-400076, India.
| | - Kuduva R Vignesh
- IITB-Monash Research Academy, Indian Institute of Technology Bombay, Powai, Mumbai-400076, India
| | - Velloth Archana
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai-400076, India.
| | - Gopalan Rajaraman
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai-400076, India.
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6
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Gillet R, Roux A, Brandel J, Huclier-Markai S, Camerel F, Jeannin O, Nonat AM, Charbonnière LJ. A Bispidol Chelator with a Phosphonate Pendant Arm: Synthesis, Cu(II) Complexation, and 64Cu Labeling. Inorg Chem 2017; 56:11738-11752. [DOI: 10.1021/acs.inorgchem.7b01731] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Raphaël Gillet
- Laboratoire d’Ingénierie
Moléculaire Appliquée à l’Analyse, Université de Strasbourg, CNRS, IPHC UMR 7178, F-67000 Strasbourg, France
| | - Amandine Roux
- Laboratoire d’Ingénierie
Moléculaire Appliquée à l’Analyse, Université de Strasbourg, CNRS, IPHC UMR 7178, F-67000 Strasbourg, France
| | - Jérémy Brandel
- Laboratoire de Reconnaissance et Procédés
de Séparation Moléculaire, Université de Strasbourg, CNRS, IPHC UMR 7178, F-67000 Strasbourg, France
| | - Sandrine Huclier-Markai
- GIP Arronax, 1 rue Aronnax, CS 10112, F-44817 Saint-Herblain, France
- Subatech Laboratory, UMR 6457, Ecole des Mines de Nantes, IN2P3/CNRS, Université de Nantes, 4 rue Alfred Kastler, F-44307 Nantes, France
| | - Franck Camerel
- Laboratoire Matière Condensée et Systèmes
Électroactifs, Institut des Sciences Chimiques de Rennes, UMR-CNRS 6226, 263 Avenue du Général Leclerc, CS
74205, F-35042 Rennes Cedex, France
| | - Olivier Jeannin
- Laboratoire Matière Condensée et Systèmes
Électroactifs, Institut des Sciences Chimiques de Rennes, UMR-CNRS 6226, 263 Avenue du Général Leclerc, CS
74205, F-35042 Rennes Cedex, France
| | - Aline M. Nonat
- Laboratoire d’Ingénierie
Moléculaire Appliquée à l’Analyse, Université de Strasbourg, CNRS, IPHC UMR 7178, F-67000 Strasbourg, France
| | - Loïc J. Charbonnière
- Laboratoire d’Ingénierie
Moléculaire Appliquée à l’Analyse, Université de Strasbourg, CNRS, IPHC UMR 7178, F-67000 Strasbourg, France
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7
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Axelson JC, Gonzalez MI, Meihaus KR, Chang CJ, Long JR. Synthesis and Characterization of a Tetrapodal NO4(4-) Ligand and Its Transition Metal Complexes. Inorg Chem 2016; 55:7527-34. [PMID: 27404805 DOI: 10.1021/acs.inorgchem.6b00908] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
We present the synthesis and characterization of alkali metal salts of the new tetraanionic, tetrapodal ligand 2,2'-(pyridine-2,6-diyl)bis(2-methylmalonate) (A4[PY(CO2)4], A = Li(+), Na(+), K(+), and Cs(+)), via deprotection of the neutral tetrapodal ligand tetraethyl 2,2'-(pyridine-2,6-diyl)bis(2-methylmalonate) (PY(CO2Et)4). The [PY(CO2)4](4-) ligand is composed of an axial pyridine and four equatorial carboxylate groups and must be kept at or below 0 °C to prevent decomposition. Exposing it to a number of divalent first-row transition metals cleanly forms complexes to give the series K2[(PY(CO2)4)M(H2O)] (M = Mn(2+), Fe(2+), Co(2+), Ni(2+), Zn(2+)). The metal complexes were comprehensively characterized via single-crystal X-ray diffraction, (1)H NMR and UV-vis absorption spectroscopy, and cyclic voltammetry. Crystal structures reveal that [PY(CO2)4](4-) coordinates in a pentadentate fashion to allow for a nearly ideal octahedral coordination geometry upon binding an exogenous water ligand. Additionally, depending on the nature of the charge-balancing countercation (Li(+), Na(+), or K(+)), the [(PY(CO2)4)M(H2O)](2-) complexes can assemble in the solid state to form one-dimensional channels filled with water molecules. Aqueous electrochemistry performed on [(PY(CO2)4)M(H2O)](2-) suggested accessible trivalent oxidation states for the Fe, Co, and Ni complexes, and the trivalent Co(3+) species [(PY(CO2)4)Co(OH)](2-) could be isolated via chemical oxidation. The successful synthesis of the [PY(CO2)4](4-) ligand and its transition metal complexes illustrates the still-untapped versatility within the tetrapodal ligand family, which may yet hold promise for the isolation of more reactive and higher-valent metal complexes.
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Affiliation(s)
- Jordan C Axelson
- Departments of Chemistry, ‡Molecular and Cell Biology, and #Chemical and Biomolecular Engineering and the §Howard Hughes Medical Institute, University of California , Berkeley, California 94720, United States.,Chemical Sciences Division and &Materials Sciences Division, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States
| | - Miguel I Gonzalez
- Departments of Chemistry, ‡Molecular and Cell Biology, and #Chemical and Biomolecular Engineering and the §Howard Hughes Medical Institute, University of California , Berkeley, California 94720, United States.,Chemical Sciences Division and &Materials Sciences Division, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States
| | - Katie R Meihaus
- Departments of Chemistry, ‡Molecular and Cell Biology, and #Chemical and Biomolecular Engineering and the §Howard Hughes Medical Institute, University of California , Berkeley, California 94720, United States.,Chemical Sciences Division and &Materials Sciences Division, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States
| | - Christopher J Chang
- Departments of Chemistry, ‡Molecular and Cell Biology, and #Chemical and Biomolecular Engineering and the §Howard Hughes Medical Institute, University of California , Berkeley, California 94720, United States.,Chemical Sciences Division and &Materials Sciences Division, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States
| | - Jeffrey R Long
- Departments of Chemistry, ‡Molecular and Cell Biology, and #Chemical and Biomolecular Engineering and the §Howard Hughes Medical Institute, University of California , Berkeley, California 94720, United States.,Chemical Sciences Division and &Materials Sciences Division, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States
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8
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Singh SK, Beg MF, Rajaraman G. Role of Magnetic Exchange Interactions in the Magnetization Relaxation of {3d-4f} Single-Molecule Magnets: A Theoretical Perspective. Chemistry 2015; 22:672-80. [DOI: 10.1002/chem.201503102] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2015] [Indexed: 11/08/2022]
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9
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Comba P, Großhauser M, Klingeler R, Koo C, Lan Y, Müller D, Park J, Powell A, Riley MJ, Wadepohl H. Magnetic Interactions in a Series of Homodinuclear Lanthanide Complexes. Inorg Chem 2015; 54:11247-58. [DOI: 10.1021/acs.inorgchem.5b01673] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Peter Comba
- Anorganisch-Chemisches
Institut und Interdisziplinäres Zentrum für Wissenschaftliches
Rechnen (IWR), Universität Heidelberg, INF 270, D-69120 Heidelberg, Germany
| | - Michael Großhauser
- Anorganisch-Chemisches
Institut und Interdisziplinäres Zentrum für Wissenschaftliches
Rechnen (IWR), Universität Heidelberg, INF 270, D-69120 Heidelberg, Germany
| | - Rüdiger Klingeler
- Kirchhoff-Institut für Physik, Universität Heidelberg, INF 227, D-69120 Heidelberg, Germany
| | - Changhyun Koo
- Kirchhoff-Institut für Physik, Universität Heidelberg, INF 227, D-69120 Heidelberg, Germany
| | - Yanhua Lan
- Institut für Anorganische Chemie, Karlsruhe Institute of Technology (KIT), Engesserstrasse 15, Geb. 30.45, D-76131 Karlsruhe, Germany
- Institute of Nanotechnology (INT), P.O. Box 3640, D-76021 Karlsruhe, Germany
| | - Dennis Müller
- Anorganisch-Chemisches
Institut und Interdisziplinäres Zentrum für Wissenschaftliches
Rechnen (IWR), Universität Heidelberg, INF 270, D-69120 Heidelberg, Germany
| | - Jaena Park
- Kirchhoff-Institut für Physik, Universität Heidelberg, INF 227, D-69120 Heidelberg, Germany
| | - Annie Powell
- Institut für Anorganische Chemie, Karlsruhe Institute of Technology (KIT), Engesserstrasse 15, Geb. 30.45, D-76131 Karlsruhe, Germany
- Institute of Nanotechnology (INT), P.O. Box 3640, D-76021 Karlsruhe, Germany
| | - Mark J. Riley
- School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane, Queensland 4072, Australia
| | - Hubert Wadepohl
- Anorganisch-Chemisches
Institut und Interdisziplinäres Zentrum für Wissenschaftliches
Rechnen (IWR), Universität Heidelberg, INF 270, D-69120 Heidelberg, Germany
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10
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Bender M, Comba P, Demeshko S, Großhauser M, Müller D, Wadepohl H. Theoretically Predicted and Experimentally Observed Relaxation Pathways of two Heterodinuclear 3d-4f Complexes. Z Anorg Allg Chem 2015. [DOI: 10.1002/zaac.201500595] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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11
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Comba P, Rudolf H, Wadepohl H. Synthesis and transition metal coordination chemistry of a novel hexadentate bispidine ligand. Dalton Trans 2015; 44:2724-36. [DOI: 10.1039/c4dt03262d] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
With the hexadentate bispidine ligand, the CuII and FeII (red) complexes are hexacoordinated with a semi-coordinated py4, the MnII complex (green) is heptacoordinated.
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Affiliation(s)
- Peter Comba
- Universität Heidelberg
- Anorganisch-Chemisches Institut and Interdisciplinary Center for Scientific Computing (IWR)
- D-69120 Heidelberg
- Germany
| | - Henning Rudolf
- Universität Heidelberg
- Anorganisch-Chemisches Institut and Interdisciplinary Center for Scientific Computing (IWR)
- D-69120 Heidelberg
- Germany
| | - Hubert Wadepohl
- Universität Heidelberg
- Anorganisch-Chemisches Institut and Interdisciplinary Center for Scientific Computing (IWR)
- D-69120 Heidelberg
- Germany
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12
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Pedersen KS, Bendix J, Clérac R. Single-molecule magnet engineering: building-block approaches. Chem Commun (Camb) 2014; 50:4396-415. [PMID: 24626635 DOI: 10.1039/c4cc00339j] [Citation(s) in RCA: 230] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Tailoring the specific magnetic properties of any material relies on the topological control of the constituent metal ion building blocks. Although this general approach does not seem to be easily applied to traditional inorganic bulk magnets, coordination chemistry offers a unique tool to delicately tune, for instance, the properties of molecules that behave as "magnets", the so-called single-molecule magnets (SMMs). Although many interesting SMMs have been prepared by a more or less serendipitous approach, the assembly of predesigned, isolatable molecular entities into higher nuclearity complexes constitutes an elegant and fascinating strategy. This Feature article focuses on the use of building blocks or modules (both terms being used indiscriminately) to direct the structure, and therefore also the magnetic properties, of metal ion complexes exhibiting SMM behaviour.
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Three K[M(salen)(CN)2]-based trinuclear sandwich-like heterobimetallic M(III)–Cu(II) (M = Fe, Cr, Co) complexes: synthesis, crystal structures, and magnetic properties. TRANSIT METAL CHEM 2014. [DOI: 10.1007/s11243-014-9806-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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14
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Lu M, Chen T, Wang M, Jiang G, Lu T, Jiang G, Du J. A new μ3-oxo-centered tri-nuclear carboxyl bridged iron (III) complex with thio-methyl groups in the periphery: Structural, spectroscopic and electrochemical studies. J Mol Struct 2014. [DOI: 10.1016/j.molstruc.2013.12.032] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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15
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Korkmaz ŞA, Karadağ A, Yerli Y, Soylu MS. Synthesis and characterization of new heterometallic cyanido complexes based on [Co(CN)6]3− building blocks: crystal structure of [Cu2(N-bishydeten)2Co(CN)6]·3H2O having a strong antiferromagnetic exchange. NEW J CHEM 2014. [DOI: 10.1039/c4nj00737a] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The hexacyanidocobalt(iii)-based four new coordination compounds have been synthesized and characterized by various techniques. The polymeric C2 having 148.3 Å3 lattice spacing among these complexes have shown very strong antiferromagnetic interaction.
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Affiliation(s)
| | - Ahmet Karadağ
- Department of Chemistry
- Art and Science Faculty
- Gaziosmanpaşa University
- Tokat, Turkey
| | - Yusuf Yerli
- Department of Physics
- Art and Science Faculty
- Yıldız Technical University
- stanbul, Turkey
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Nemec I, Herchel R, Šilha T, Trávníček Z. Towards a better understanding of magnetic exchange mediated by hydrogen bonds in Mn(iii)/Fe(iii) salen-type supramolecular dimers. Dalton Trans 2014; 43:15602-16. [DOI: 10.1039/c4dt02025a] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Detailed investigations of the magnetic coupling and magnetic anisotropy in a series of Schiff base salen-type Fe(iii) and Mn(iii) complexes, based on SQUID experiments and DFT calculations, are reported.
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Affiliation(s)
- Ivan Nemec
- Regional Centre of Advanced Technologies and Materials & Department of Inorganic Chemistry
- Faculty of Science
- Palacký University
- Olomouc, Czech Republic
| | - Radovan Herchel
- Regional Centre of Advanced Technologies and Materials & Department of Inorganic Chemistry
- Faculty of Science
- Palacký University
- Olomouc, Czech Republic
| | - Tomáš Šilha
- Regional Centre of Advanced Technologies and Materials & Department of Inorganic Chemistry
- Faculty of Science
- Palacký University
- Olomouc, Czech Republic
| | - Zdeněk Trávníček
- Regional Centre of Advanced Technologies and Materials & Department of Inorganic Chemistry
- Faculty of Science
- Palacký University
- Olomouc, Czech Republic
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Ferbinteanu M, Cimpoesu F, Tanase S. Metal-Organic Frameworks with d–f Cyanide Bridges: Structural Diversity, Bonding Regime, and Magnetism. LANTHANIDE METAL-ORGANIC FRAMEWORKS 2014. [DOI: 10.1007/430_2014_156] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
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18
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Zhou H, Yan J, Shen X, Zhou H, Yuan A. Low dimensional cyano-bridged heterobimetallic M–FeIII(M = NiII, CuII) complexes constructed from Mer-[FeIII(qcq)(CN)3]−building blocks: syntheses, structures and magnetic properties. RSC Adv 2014. [DOI: 10.1039/c3ra45218b] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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19
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Singh SK, Rajaraman G. Can anisotropic exchange be reliably calculated using density functional methods? A case study on trinuclear Mn(III)-M(III)-Mn(III) (M=Fe, Ru, and Os) cyanometalate single-molecule magnets. Chemistry 2013; 20:113-23. [PMID: 24288194 DOI: 10.1002/chem.201303489] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2013] [Indexed: 11/05/2022]
Abstract
Density functional studies have been performed on a set of trinuclear single-molecule magnets (SMMs) of general formula [{Mn2(5-Br salen)2(MeOH)2}M(CN)6](NEt4) (M=Fe(III) (1), Ru(III) (2) and Os(III) (3); 5-Brsalen=N,N'-ethylenebis(5-bromosalicylidene)iminato anion). We have computed the orbital-dependent exchange interaction for all three complexes for the first time using DFT and complete active space self-consistent field (CASSCF) methods. DFT calculations yield the anisotropic exchange as J(ξξ)=3.5 cm(-1) for 1; J(ξξ)=12.1 cm(-1), J(ζζ)=-6.9 cm(-1) and J(ηη)=-14 cm(-1) for 2; and J(ξξ)=23.7 cm(-1) and J(ζζ) =-11.1 cm(-1) for 3. The computed values are in agreement with the experimental report, and this suggests that the established methodology can be used to compute the anisotropic exchange in larger clusters. Our calculations reiterate the fact that the exchange is described by a three-axis anisotropic exchange for complexes 2 and 3 as evidenced by the experiments. A stronger exchange coupling as we move down the periodic table from 3d to 5d is reproduced by our calculations, and the origin of this enhancement in the exchange interaction has been probed by using molecular orbital analysis. The electronic origin of different types of exchange observed in this series is found to be related to the energy difference between possible degenerate pairs and the nature of orbital interactions. By computing the exchange interaction, the single-ion anisotropy of Mn(III) and zero-field splitting of the S=9/2 ground state of complexes 1-3 using CASSCF and/or DFT methods, we have attempted to shed light on the issue of anisotropic exchange and the barrier height for the magnetisation reversal in SMMs. Comprehensive magneto-structural correlations have been developed to offer clues on how to further enhance the barrier height in this class of SMMs.
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Affiliation(s)
- Saurabh Kumar Singh
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai-400076 (India), Fax: +91-(0)22-2576-7152
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Liu JY, Yuan B, Zhang LJ, Wang Y, Ding B, Zhao XJ. Three cyanide-bridged assemblies induced by positive ions: Hydrothermal syntheses, crystal and powder X-ray structures. Inorganica Chim Acta 2013. [DOI: 10.1016/j.ica.2013.07.036] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Cimpoesu F, Zaharia A, Stamate D, Panait P, Oprea CI, Gîrţu MA, Ferbinteanu M. New insights in the bonding regime and ligand field in Wernerian complexes. A density functional study. Polyhedron 2013. [DOI: 10.1016/j.poly.2012.10.012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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22
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Ruamps R, Maurice R, Batchelor L, Boggio-Pasqua M, Guillot R, Barra AL, Liu J, Bendeif EE, Pillet S, Hill S, Mallah T, Guihéry N. Giant Ising-Type Magnetic Anisotropy in Trigonal Bipyramidal Ni(II) Complexes: Experiment and Theory. J Am Chem Soc 2013; 135:3017-26. [DOI: 10.1021/ja308146e] [Citation(s) in RCA: 121] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Renaud Ruamps
- Laboratoire de Chimie et Physique
Quantiques, Université de Toulouse 3, 118 route de Narbonne, 31062 Toulouse cedex 06, France
| | - Rémi Maurice
- Laboratoire de Chimie et Physique
Quantiques, Université de Toulouse 3, 118 route de Narbonne, 31062 Toulouse cedex 06, France
- Department of Theoretical Chemistry,
Zernike Institute for Advanced Materials, University of Groningen, The Netherlands
- Departament de Química
Física i Inorganica, Universitat Rovira i Virgili, Marcel.lí Domingo s/n, 43007 Tarragona, Spain
| | - Luke Batchelor
- Université Paris Sud 11, CNRS, Institut de Chimie Moléculaire
et des Matériaux d’Orsay, F-91405 Orsay, France
| | - Martial Boggio-Pasqua
- Laboratoire de Chimie et Physique
Quantiques, Université de Toulouse 3, 118 route de Narbonne, 31062 Toulouse cedex 06, France
| | - Régis Guillot
- Université Paris Sud 11, CNRS, Institut de Chimie Moléculaire
et des Matériaux d’Orsay, F-91405 Orsay, France
| | - Anne Laure Barra
- Laboratoire National des Champs
Magnétiques Intenses, UPR CNRS 3228, Université J. Fourier, 25, Avenue des Martyrs, B.P. 166, 38042
Grenoble Cedex 9, France
| | - Junjie Liu
- National
High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32310,
United States
| | - El-Eulmi Bendeif
- Université de Lorraine, CRM2, UMR 7036, Boulevard des Aiguillettes,
Vandoeuvre les Nancy, F-54506, France
- CNRS, CRM2, UMR 7036, Boulevard
des Aiguillettes, Vandoeuvre les Nancy, F-54506, France
| | - Sébastien Pillet
- Université de Lorraine, CRM2, UMR 7036, Boulevard des Aiguillettes,
Vandoeuvre les Nancy, F-54506, France
- CNRS, CRM2, UMR 7036, Boulevard
des Aiguillettes, Vandoeuvre les Nancy, F-54506, France
| | - Stephen Hill
- National
High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32310,
United States
- Department
of Physics, Florida State University, Tallahassee,
Florida 32306,
United States
| | - Talal Mallah
- Université Paris Sud 11, CNRS, Institut de Chimie Moléculaire
et des Matériaux d’Orsay, F-91405 Orsay, France
| | - Nathalie Guihéry
- Laboratoire de Chimie et Physique
Quantiques, Université de Toulouse 3, 118 route de Narbonne, 31062 Toulouse cedex 06, France
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Panja A, Guionneau P, Jeon IR, Holmes SM, Clérac R, Mathonière C. Syntheses, Structures, and Magnetic Properties of a Novel mer-[(bbp)FeIII(CN)3]2– Building Block (bbp: bis(2-benzimidazolyl)pyridine dianion) and Its Related Heterobimetallic Fe(III)–Ni(II) Complexes. Inorg Chem 2012; 51:12350-9. [PMID: 23134343 DOI: 10.1021/ic301661x] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Anangamohan Panja
- CNRS, ICMCB, UPR
9048, F-33600 Pessac, France
- Univ. of Bordeaux, ICMCB, UPR 9048, F-33600
Pessac, France
| | - Philippe Guionneau
- CNRS, ICMCB, UPR
9048, F-33600 Pessac, France
- Univ. of Bordeaux, ICMCB, UPR 9048, F-33600
Pessac, France
| | - Ie-Rang Jeon
- CNRS, ICMCB, UPR
9048, F-33600 Pessac, France
- Univ. of Bordeaux, ICMCB, UPR 9048, F-33600
Pessac, France
- CNRS, CRPP, UPR 8641, F-33600 Pessac, France
- Univ. of Bordeaux, CRPP, UPR 8641, F-33600 Pessac, France
| | | | - Rodolphe Clérac
- CNRS, CRPP, UPR 8641, F-33600 Pessac, France
- Univ. of Bordeaux, CRPP, UPR 8641, F-33600 Pessac, France
| | - Corine Mathonière
- CNRS, ICMCB, UPR
9048, F-33600 Pessac, France
- Univ. of Bordeaux, ICMCB, UPR 9048, F-33600
Pessac, France
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Atanasov M, Comba P, Helmle S. Cyanide-Bridged FeIII–CuII Complexes: Jahn–Teller Isomerism and Its Influence on the Magnetic Properties. Inorg Chem 2012; 51:9357-68. [DOI: 10.1021/ic301122h] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Mihail Atanasov
- Anorganisch-Chemisches
Institut,
INF 270, Universität Heidelberg,
D-69120 Heidelberg, Germany
- Max-Planck-Institut für Chemische Energiekonversion, Stiftstr. 34-36,
D-45470 Mülheim an der Ruhr, Germany
- Institute of General and Inorganic
Chemistry, Bulgarian Academy of Sciences, Acad.Georgi Bontchev Str. Bl.11, 1113 Sofia, Bulgaria
| | - Peter Comba
- Anorganisch-Chemisches
Institut,
INF 270, Universität Heidelberg,
D-69120 Heidelberg, Germany
| | - Stefan Helmle
- Anorganisch-Chemisches
Institut,
INF 270, Universität Heidelberg,
D-69120 Heidelberg, Germany
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25
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Zhang D, Zhao Z, Wang P, Chen X. K[Fe(5-Clsalen)(CN)2] as a new building block for heterobimetallic 1-D cyanide-bridged FeIII–MnII complexes: synthesis, crystal structures, and magnetic properties. J COORD CHEM 2012. [DOI: 10.1080/00958972.2012.699047] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Daopeng Zhang
- a College of Chemical Engineering, Shandong University of Technology , Zibo 255049 , P. R. China
| | - Zengdian Zhao
- a College of Chemical Engineering, Shandong University of Technology , Zibo 255049 , P. R. China
| | - Ping Wang
- a College of Chemical Engineering, Shandong University of Technology , Zibo 255049 , P. R. China
| | - Xia Chen
- a College of Chemical Engineering, Shandong University of Technology , Zibo 255049 , P. R. China
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26
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Application of a Nickel-Bispidine Complex as Pre-Catalyst for C(sp 2)–C(sp 3) Bond Formations. Catal Letters 2012. [DOI: 10.1007/s10562-012-0806-4] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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27
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Atanasov M, Comba P, Hanson GR, Hausberg S, Helmle S, Wadepohl H. Cyano-bridged Homodinuclear Copper(II) Complexes. Inorg Chem 2011; 50:6890-901. [DOI: 10.1021/ic102430a] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Atanasov M, Ganyushin D, Pantazis DA, Sivalingam K, Neese F. Detailed ab initio first-principles study of the magnetic anisotropy in a family of trigonal pyramidal iron(II) pyrrolide complexes. Inorg Chem 2011; 50:7460-77. [PMID: 21744845 DOI: 10.1021/ic200196k] [Citation(s) in RCA: 125] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
A theoretical, computational, and conceptual framework for the interpretation and prediction of the magnetic anisotropy of transition metal complexes with orbitally degenerate or orbitally nearly degenerate ground states is explored. The treatment is based on complete active space self-consistent field (CASSCF) wave functions in conjunction with N-electron valence perturbation theory (NEVPT2) and quasidegenerate perturbation theory (QDPT) for treatment of magnetic field- and spin-dependent relativistic effects. The methodology is applied to a series of Fe(II) complexes in ligand fields of almost trigonal pyramidal symmetry as provided by several variants of the tris-pyrrolylmethyl amine ligand (tpa). These systems have recently attracted much attention as mononuclear single-molecule magnet (SMM) complexes. This study aims to establish how the ligand field can be fine tuned in order to maximize the magnetic anisotropy barrier. In trigonal ligand fields high-spin Fe(II) complexes adopt an orbitally degenerate (5)E ground state with strong in-state spin-orbit coupling (SOC). We study the competing effects of SOC and the (5)E⊗ε multimode Jahn-Teller effect as a function of the peripheral substituents on the tpa ligand. These subtle distortions were found to have a significant effect on the magnetic anisotropy. Using a rigorous treatment of all spin multiplets arising from the triplet and quintet states in the d(6) configuration the parameters of the effective spin-Hamiltonian (SH) approach were predicted from first principles. Being based on a nonperturbative approach we investigate under which conditions the SH approach is valid and what terms need to be retained. It is demonstrated that already tiny geometric distortions observed in the crystal structures of four structurally and magnetically well-documented systems, reported recently, i.e., [Fe(tpa(R))](-) (R = tert-butyl, Tbu (1), mesityl, Mes (2), phenyl, Ph (3), and 2,6-difluorophenyl, Dfp (4), are enough to lead to five lowest and thermally accessible spin sublevels described sufficiently well by S = 2 SH provided that it is extended with one fourth order anisotropy term. Using this most elementary parametrization that is consistent with the actual physics, the reported magnetization data for the target systems were reinterpreted and found to be in good agreement with the ab initio results. The multiplet energies from the ab initio calculations have been fitted with remarkable consistency using a ligand field (angular overlap) model (ab initio ligand field, AILFT). This allows for determination of bonding parameters and quantitatively demonstrates the correlation between increasingly negative D values and changes in the σ-bond strength induced by the peripheral ligands. In fact, the sigma-bonding capacity (and hence the Lewis basicity) of the ligand decreases along the series 1 > 2 > 3 > 4.
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Affiliation(s)
- Mihail Atanasov
- Institute for Physical and Theoretical Chemistry, University of Bonn, Wegelerstrasse 12, D-53115 Bonn, Germany.
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29
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Two-dimensional coordination compounds based on Fe(II) and Co(III) hexacyanometallates with Cu(II)(dien) groups: Structures and magnetic properties. Inorganica Chim Acta 2011. [DOI: 10.1016/j.ica.2011.03.067] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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30
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A series of trinuclear sandwich-like cyanide-bridged iron(III)-manganese(II) complexes: synthesis, crystal structures, and magnetic properties. TRANSIT METAL CHEM 2011. [DOI: 10.1007/s11243-011-9500-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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31
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Atanasov M, Delley B, Neese F, Tregenna-Piggott PL, Sigrist M. Theoretical Insights into the Magnetostructural Correlations in Mn3-Based Single-Molecule Magnets. Inorg Chem 2011; 50:2112-24. [DOI: 10.1021/ic1023482] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- M. Atanasov
- Paul Scherrer Institute and ETH Zürich, CH-5232 Villigen PSI, Switzerland
- Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
- Lehrstuhl für Theoretische Chemie, Universität Bonn, Wegelerstrasse 12, D-53115 Bonn, Germany
| | - B. Delley
- Paul Scherrer Institute and ETH Zürich, CH-5232 Villigen PSI, Switzerland
| | - F. Neese
- Lehrstuhl für Theoretische Chemie, Universität Bonn, Wegelerstrasse 12, D-53115 Bonn, Germany
| | | | - M. Sigrist
- Institute Laue Langevin, Avenue des Martyrs, BP 156, F-38042 Grenoble Cedex 9, France
- Institute of Chemistry, Universitetsparken 5, DK-2100 Copenhagen, Denmark
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32
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Sima WW, Zhang W. Synthesis, crystal structures and magnetic properties of two three-dimensional heterotrimetallic compounds [Cu(en)2Li(H2O)][Fe(CN)6] and [Cu(en)2Li(H2O)][Co(CN)6] (en = ethylenediamine). INORG CHEM COMMUN 2011. [DOI: 10.1016/j.inoche.2010.10.016] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Palii A, Tsukerblat B, Klokishner S, Dunbar KR, Clemente-Juan JM, Coronado E. Beyond the spin model: exchange coupling in molecular magnets with unquenched orbital angular momenta. Chem Soc Rev 2011; 40:3130-56. [DOI: 10.1039/c0cs00175a] [Citation(s) in RCA: 101] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Pedersen KS, Schau-Magnussen M, Bendix J, Weihe H, Palii AV, Klokishner SI, Ostrovsky S, Reu OS, Mutka H, Tregenna-Piggott PLW. Enhancing the Blocking Temperature in Single-Molecule Magnets by Incorporating 3d-5d Exchange Interactions. Chemistry 2010; 16:13458-64. [DOI: 10.1002/chem.201001259] [Citation(s) in RCA: 74] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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35
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Chen W, Wu A, Guo G, Wang M, Cai L, Huang J. Cyano‐Bridged 2D Bimetallic 4f–3d Arrays with Monolayered Stair‐Like, Brick‐Wall‐Like, or Bilayered Topologies – Rational Syntheses and Crystal Structures. Eur J Inorg Chem 2010. [DOI: 10.1002/ejic.201000112] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Wen‐Tong Chen
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, Fujian, P. R. China, Fax: 86‐591‐83714946
- School of Chemistry and Chemical Engineering, Jiangxi Province Key Laboratory of Coordination Chemistry, Jinggangshan University, Ji'an, 343009, Jiangxi, P. R. China
| | - A‐Qing Wu
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, Fujian, P. R. China, Fax: 86‐591‐83714946
| | - Guo‐Cong Guo
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, Fujian, P. R. China, Fax: 86‐591‐83714946
| | - Ming‐Sheng Wang
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, Fujian, P. R. China, Fax: 86‐591‐83714946
| | - Li‐Zhen Cai
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, Fujian, P. R. China, Fax: 86‐591‐83714946
| | - Jin‐Shun Huang
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, Fujian, P. R. China, Fax: 86‐591‐83714946
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Karadas F, Shatruk M, Perez L, Dunbar K. Cyanide-Bridged [CoII2MII] and [CoII2MII2] Complexes Based on the [CoII(triphos)(CN)2] Building Block: Syntheses, Structures, Magnetic Properties, and Density Functional Theoretical Studies. Chemistry 2010; 16:7164-73. [DOI: 10.1002/chem.201000128] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Freiherr von Richthofen CG, Stammler A, Bögge H, DeGroot MW, Long JR, Glaser T. Synthesis, structure, and magnetic characterization of a C3-symmetric Mn(III)3Cr(III) assembly: molecular recognition between a trinuclear Mn(III) triplesalen complex and a fac-triscyano Cr(III) complex. Inorg Chem 2010; 48:10165-76. [PMID: 19803531 DOI: 10.1021/ic901148q] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The reaction of the tris(tetradentate) triplesalen ligand H(6)talen(t-Bu(2)), which provides three salen-like coordination environments bridged in a meta-phenylene arrangement by a phloroglucinol backbone, with Mn(II) salts under aerobic conditions, affords, in situ, the trinuclear Mn(III) triplesalen complex [(talen(t-Bu(2))){Mn(III)(solv)(n)}(3)](3+). This species then reacts with [(Me(3)tacn)Cr(CN)(3)] to form the tetranuclear complex [{(talen(t-Bu(2)))Mn(III)(3)}{(Me(3)tacn)Cr(CN)(3)}](3+) ([Mn(III)(3)Cr(III)](3+)). The regular ligand folding observed in the trinuclear triplesalen complex preorganizes the three metal ions for the reaction with three facially coordinated nitrogen atoms of [(Me(3)tacn)Cr(CN)(3)]. [{(talen(t-Bu(2)))(Mn(III)(MeOH))(3)}{(Me(3)tacn)Cr(CN)(3)}](ClO(4))(3) (1) was characterized by infrared spectroscopy, elemental analysis, mass spectrometry, electron absorption spectroscopy, and magnetic measurements. The molecular structure was established for the acetate-substituted derivative [{(talen(t-Bu(2)))(Mn(III)(MeOH))(2)(Mn(III)(OAc))}{(Me(3)tacn)Cr(CN)(3)}](ClO(4))(2) (2) by single-crystal X-ray diffraction. Variable-temperature-variable-field and mu(eff) versus T magnetic data have been analyzed in detail by full-matrix diagonalization of the appropriate spin-Hamiltonian, consisting of isotropic exchange, zero-field splitting, and Zeeman interaction components. Satisfactory reproduction of the experimental data has been obtained for the parameters J(Mn-Cr) = -0.12 +/- 0.04 cm(-1), J(Mn-Mn) = -0.70 +/- 0.03 cm(-1), and D(Mn) = -3.0 +/- 0.4 cm(-1). These generate a triply degenerate pseudo S(t) = 7/2 spin manifold, which cannot be appropriately described by a giant spin model and which exhibits a weak easy-axis magnetic anisotropy. This is corroborated by the onset of a frequency-dependent chi'' signal at low temperatures, demonstrating a slow relaxation of the magnetization indicative of 1 being a single-molecule magnet. Comparing the properties to those of the heptanuclear analogue [{(talen(t-Bu(2)))Mn(III)(3)}(2){Cr(III)(CN)(6)}](3+) ([Mn(III)(6)Cr(III)](3+)) formed by the reaction of 2 equiv of [(talen(t-Bu(2))){Mn(III)(solv)(n)}(3)](3+) with 1 equiv of [Cr(CN)(6)](3-) [Glaser, T.; Heidemeier, M.; Weyhermüller, T.; Hoffmann, R.-D.; Rupp, H.; Müller, P. Angew. Chem. Int. Ed., 2006, 45, 6033-6037] demonstrates a lower driving force for formation, a strongly reduced J(Mn-Cr) exchange, a slightly reduced J(Mn-Mn) exchange, and a significantly longer Mn-N(N[triple bond]C) bond length in [Mn(III)(3)Cr(III)](3+). Taking into account magneto-structural correlations establishes a supramolecular interaction between the two [(talen(t-Bu(2)))Mn(III)(3)](3+) subunits in [Mn(III)(6)Cr(III)](3+) responsible for the structural distortion and the short Mn-N(N[triple bond]C) distance which results in a strong J(Mn-Cr) exchange and thus [Mn(III)(6)Cr(III)](3+) being a single-molecule magnet with a relatively high effective anisotropy barrier of 25.4 K.
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Palii A, Tsukerblat B, Clemente-Juan JM, Coronado E. Magnetic exchange between metal ions with unquenched orbital angular momenta: basic concepts and relevance to molecular magnetism. INT REV PHYS CHEM 2010. [DOI: 10.1080/01442350903435256] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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39
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Maxim C, Sorace L, Khuntia P, Madalan AM, Kravtsov V, Lascialfari A, Caneschi A, Journaux Y, Andruh M. A missing high-spin molecule in the family of cyanido-bridged heptanuclear heterometal complexes, [(LCuII)6FeIII(CN)6]3+, and its CoIII and CrIII analogues, accompanied in the crystal by a novel octameric water cluster. Dalton Trans 2010; 39:4838-47. [DOI: 10.1039/b924505g] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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40
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Zhang D, Wang H, Chen Y, Ni ZH, Tian L, Jiang J. Hydrogen-Bond Directed Cyanide-Bridged Molecular Magnets Derived from Polycyanidemetalates and Schiff Base Manganese(III) Compounds: Synthesis, Structures, and Magnetic Properties. Inorg Chem 2009; 48:11215-25. [DOI: 10.1021/ic901530p] [Citation(s) in RCA: 103] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Daopeng Zhang
- Department of Chemistry, University of Science and Technology Beijing, Beijing 100083, China
- Department of Chemistry, Shandong University, Jinan 250100, China
| | - Hailong Wang
- Department of Chemistry, University of Science and Technology Beijing, Beijing 100083, China
- Department of Chemistry, Shandong University, Jinan 250100, China
| | - Yuting Chen
- Department of Chemistry, Shandong University, Jinan 250100, China
| | - Zhong-Hai Ni
- Department of Chemistry, Shandong University, Jinan 250100, China
| | - Laijin Tian
- Department of Chemistry, Shandong University, Jinan 250100, China
| | - Jianzhuang Jiang
- Department of Chemistry, University of Science and Technology Beijing, Beijing 100083, China
- Department of Chemistry, Shandong University, Jinan 250100, China
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Comba P, Haaf C, Lienke A, Muruganantham A, Wadepohl H. Synthesis, Structure, and Highly Efficient Copper-Catalyzed Aziridination with a Tetraaza-Bispidine Ligand. Chemistry 2009; 15:10880-7. [DOI: 10.1002/chem.200802682] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Comba P, Hausberg S, Martin B. Calculation of Exchange Coupling Constants of Transition Metal Complexes with DFT. J Phys Chem A 2009; 113:6751-5. [DOI: 10.1021/jp900752p] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Peter Comba
- Universität Heidelberg, Anorganisch-Chemisches Institut, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
| | - Sascha Hausberg
- Universität Heidelberg, Anorganisch-Chemisches Institut, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
| | - Bodo Martin
- Universität Heidelberg, Anorganisch-Chemisches Institut, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
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Tregenna-Piggott PLW, Sheptyakov D, Keller L, Klokishner SI, Ostrovsky SM, Palii AV, Reu OS, Bendix J, Brock-Nannestad T, Pedersen K, Weihe H, Mutka H. Single-ion anisotropy and exchange interactions in the cyano-bridged trimers MnIII2MIII(CN)6 (MIII = Co, Cr, Fe) species incorporating [Mn(5-Brsalen)]+ units: an inelastic neutron scattering and magnetic susceptibility study. Inorg Chem 2009; 48:128-37. [PMID: 19035636 DOI: 10.1021/ic801727p] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The electronic structures of the compounds K[(5-Brsalen)(2)(H(2)O)(2)-Mn(2)M(III)(CN)(6)].2H(2)O (M(III) = Co(III), Cr(III), Fe(III)) have been determined by inelastic neutron scattering (INS) and magnetic susceptibility studies, revealing the manganese(III) single-ion anisotropy and exchange interactions that define the low-lying states of the Mn-M(III)-Mn trimeric units. Despite the presence of an antiferromagnetic intertrimer interaction, the experimental evidence supports the classification of both the Cr(III) and Fe(III) compounds as single-molecule magnets. The value of 17(2) cm(-1) established from AC susceptibility measurements for a spin-reversal barrier of K[(5-Brsalen)(2)(H(2)O)(2)-Mn(2)Cr(CN)(6)].2H(2)O may be readily rationalized in terms of the energy level diagram determined directly by INS. AC susceptibility measurements on samples of K[(5-Brsalen)(2)(H(2)O)(2)-Mn(2)Fe(CN)(6)].2H(2)O are contrary to those previously reported, exhibiting but the onset of peaks below temperatures of 1.8 K at oscillating frequencies in the range of 100-800 Hz. INS measurements reveal an anisotropic ferromagnetic manganese(III)-iron(III) exchange interaction, in accordance with theoretical expectations based on the unquenched orbital angular momentum of the [Fe(CN)(6)](3-) anion, giving rise to an M(s) approximately +/-9/2 ground state, isolated by approximately 11.5 cm(-1) from the higher-lying levels. The reported INS and magnetic data should now serve as a benchmark against which theoretical models that aim to inter-relate the electronic and molecular structure of molecular magnets should be tested.
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Affiliation(s)
- Philip L W Tregenna-Piggott
- Laboratory for Neutron Scattering, ETH Zurich and Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland.
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Hernandez-Molina M, Long J, Chamoreau LM, Cantin JL, von Bardeleben J, Marvaud V. Hexacyanidometalate molecular chemistry: di-, tri-, tetra-, penta- (cis/trans) and hepta-nuclear chromium–copper and cobalt–copper complexes. NEW J CHEM 2009. [DOI: 10.1039/b902889g] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Zhang D, Wang H, Chen Y, Zhang L, Tian L, Ni ZH, Jiang J. Synthesis, structure, and magnetic properties of cyanide-bridged low-dimensional heterometallic FeIII–MnII complexes. Dalton Trans 2009:9418-25. [DOI: 10.1039/b909717a] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Tsukerblat B, Klokishner S, Palii A. Jahn–Teller Effect in Molecular Magnetism: An Overview. SPRINGER SERIES IN CHEMICAL PHYSICS 2009. [DOI: 10.1007/978-3-642-03432-9_18] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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Atanasov M, Comba P. The Effect of Jahn–Teller Coupling in Hexacyanometalates on the Magnetic Anisotropy in Cyanide-Bridged Single-Molecule Magnets. SPRINGER SERIES IN CHEMICAL PHYSICS 2009. [DOI: 10.1007/978-3-642-03432-9_19] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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Bentz A, Comba P, Deeth RJ, Kerscher M, Seibold B, Wadepohl H. Modeling of the Various Minima on the Potential Energy Surface of Bispidine Copper(II) Complexes: A Further Test for Ligand Field Molecular Mechanics. Inorg Chem 2008; 47:9518-27. [DOI: 10.1021/ic8011052] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Alexander Bentz
- Universität Heidelberg, Anorganisch-Chemisches Institut, Im Neuenheimer Feld 270, D-69120 Heidelberg, Germany, and University of Warwick, Department of Chemistry, Gibbet Hill Road, Coventry, UK CV4 7AL
| | - Peter Comba
- Universität Heidelberg, Anorganisch-Chemisches Institut, Im Neuenheimer Feld 270, D-69120 Heidelberg, Germany, and University of Warwick, Department of Chemistry, Gibbet Hill Road, Coventry, UK CV4 7AL
| | - Robert J. Deeth
- Universität Heidelberg, Anorganisch-Chemisches Institut, Im Neuenheimer Feld 270, D-69120 Heidelberg, Germany, and University of Warwick, Department of Chemistry, Gibbet Hill Road, Coventry, UK CV4 7AL
| | - Marion Kerscher
- Universität Heidelberg, Anorganisch-Chemisches Institut, Im Neuenheimer Feld 270, D-69120 Heidelberg, Germany, and University of Warwick, Department of Chemistry, Gibbet Hill Road, Coventry, UK CV4 7AL
| | - Björn Seibold
- Universität Heidelberg, Anorganisch-Chemisches Institut, Im Neuenheimer Feld 270, D-69120 Heidelberg, Germany, and University of Warwick, Department of Chemistry, Gibbet Hill Road, Coventry, UK CV4 7AL
| | - Hubert Wadepohl
- Universität Heidelberg, Anorganisch-Chemisches Institut, Im Neuenheimer Feld 270, D-69120 Heidelberg, Germany, and University of Warwick, Department of Chemistry, Gibbet Hill Road, Coventry, UK CV4 7AL
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