1
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Corner S, Gransbury GK, Vitorica-Yrezabal IJ, Whitehead GFS, Chilton NF, Mills DP. Halobenzene Adducts of a Dysprosocenium Single-Molecule Magnet. Inorg Chem 2024; 63:9552-9561. [PMID: 38359351 PMCID: PMC11134494 DOI: 10.1021/acs.inorgchem.3c04105] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2023] [Revised: 01/18/2024] [Accepted: 01/23/2024] [Indexed: 02/17/2024]
Abstract
Dysprosium complexes with strong axial crystal fields are promising candidates for single-molecule magnets (SMMs), which could be used for high-density data storage. Isolated dysprosocenium cations, [Dy(CpR)2]+ (CpR = substituted cyclopentadienyl), have recently shown magnetic hysteresis (a memory effect) above the temperature of liquid nitrogen. Synthetic efforts have focused on reducing strong transverse ligand fields in these systems as they are known to enhance magnetic relaxation by spin-phonon mechanisms. Here we show that equatorial coordination of the halobenzenes PhX (X = F, Cl, Br) and o-C6H4F2 to the cation of a recently reported dysprosocenium complex [Dy(Cpttt)(Cp*)][Al{OC(CF3)3}4] (Cpttt = C5H2tBu3-1,2,4; Cp* = C5Me5) reduces magnetic hysteresis temperatures compared to that of the parent cation. We find that this is due to increased effectiveness of both one- (Orbach) and two-phonon (Raman) relaxation mechanisms, which correlate with the electronegativity and number of interactions with the halide despite κ1-coordination of a single halobenzene having a minimal effect on the metrical parameters of [Dy(Cpttt)(Cp*)(PhX-κ1-X)]+ cations vs the isolated [Dy(Cpttt)(Cp*)]+ cation. We observe unusual divergent behavior of relaxation rates at low temperatures in [Dy(Cpttt)(Cp*)(PhX)][Al{OC(CF3)3}4], which we attribute to a phonon bottleneck effect. We find that, despite the transverse fields introduced by the monohalobenzenes in these cations, the interactions are sufficiently weak that the effective barriers to magnetization reversal remain above 1000 cm-1, being only ca. 100 cm-1 lower than for the parent complex, [Dy(Cpttt)(Cp*)][Al{OC(CF3)3}4].
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Affiliation(s)
| | | | | | - George F. S. Whitehead
- Department of Chemistry, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | | | - David P. Mills
- Department of Chemistry, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
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2
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Salhi J, Calupitan JP, Mattera M, Montero D, Miche A, Maruchenko R, Proust A, Izzet G, Kreher D, Arfaoui I, Volatron F. Ready-to-be-addressed oxo-clusters: individualized, periodically organized and separated from the substrate. NANOSCALE 2023; 15:13233-13238. [PMID: 37540202 DOI: 10.1039/d3nr02649c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/05/2023]
Abstract
Clusters and oxo-clusters are drawing attention for their amazing physical properties, especially at the scale of the single molecule. However, chemical methods to organize them individually on a surface are still lacking. In this study we show that it is possible to periodically organize individual polyoxometalates thanks to their ordering by a new supramolecular assembly.
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Affiliation(s)
- Juba Salhi
- Institut parisien de chimie moléculaire (IPCM), CNRS, Sorbonne Université, 4 Place Jussieu, F-75005 Paris, France.
| | - Jan Patrick Calupitan
- Institut parisien de chimie moléculaire (IPCM), CNRS, Sorbonne Université, 4 Place Jussieu, F-75005 Paris, France.
| | - Michele Mattera
- Institut parisien de chimie moléculaire (IPCM), CNRS, Sorbonne Université, 4 Place Jussieu, F-75005 Paris, France.
| | - David Montero
- Fédération de chimie et matériaux de Paris-centre (FCMat), Sorbonne Université, 4 Place Jussieu, F-75005 Paris, France
| | - Antoine Miche
- Laboratoire de réactivité de surface (LRS), CNRS, Sorbonne Université, 4 Place Jussieu, F-75005 Paris, France
| | - Régina Maruchenko
- Institut parisien de chimie moléculaire (IPCM), CNRS, Sorbonne Université, 4 Place Jussieu, F-75005 Paris, France.
| | - Anna Proust
- Institut parisien de chimie moléculaire (IPCM), CNRS, Sorbonne Université, 4 Place Jussieu, F-75005 Paris, France.
| | - Guillaume Izzet
- Institut parisien de chimie moléculaire (IPCM), CNRS, Sorbonne Université, 4 Place Jussieu, F-75005 Paris, France.
| | - David Kreher
- Institut Lavoisier de Versailles (ILV), CNRS, Université Paris-Saclay, 45 avenue des Etats-Unis, F-78035 Versailles, France
| | - Imad Arfaoui
- De la molécule aux nano-objets: réactivité, interactions et spectroscopies (MONARIS), CNRS, Sorbonne Université, 4 Place Jussieu, F-75005 Paris, France
| | - Florence Volatron
- Institut parisien de chimie moléculaire (IPCM), CNRS, Sorbonne Université, 4 Place Jussieu, F-75005 Paris, France.
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3
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Moseley IP, Ard CP, DiVerdi JA, Ozarowski A, Chen H, Zadrozny JM. Slowing magnetic relaxation with open-shell diluents. CELL REPORTS. PHYSICAL SCIENCE 2022; 3:100802. [PMID: 35425929 PMCID: PMC9007552 DOI: 10.1016/j.xcrp.2022.100802] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Strategies for slowing magnetic relaxation via local environmental design are vital for developing next-generation spin-based technologies (e.g., quantum information processing). Herein, we demonstrate a technique to do so via chemical design of a local magnetic environment. We show that embedding the open-shell complex (Ph4P)2[Co(SPh)4] in solid-state matrices of the isostructural, open-shell species (Ph4P)2[M(SPh)4] (M = Ni2+, S = 1; M = Fe2+, S = 2; M = Mn2+, S = 5 2 ) will slow magnetic relaxation for the embedded [Co(SPh)4]2- ion by three orders of magnitude. Magnetometry, electron paramagnetic resonance (EPR), and computational analyses reveal that integer spin and large, positive zero-field splitting (D) values for the diluent produce a quiet, local magnetic field that slows relaxation rates for the embedded Co molecules. These results will enable the investigation of magnetic systems for which strictly diamagnetic congeners are either synthetically inaccessible or are not isostructural.
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Affiliation(s)
- Ian P. Moseley
- Department of Chemistry, Colorado State University, Fort Collins, CO 80523, USA
| | - Christopher P. Ard
- Department of Physics, Colorado State University, Fort Collins, CO 80523, USA
| | - Joseph A. DiVerdi
- Department of Chemistry, Colorado State University, Fort Collins, CO 80523, USA
| | - Andrew Ozarowski
- National High Magnetic Field Laboratory, Tallahassee, FL 32310, USA
| | - Hua Chen
- Department of Physics, Colorado State University, Fort Collins, CO 80523, USA
- School of Advanced Materials Discovery, Colorado State University, Fort Collins, CO 80523, USA
| | - Joseph M. Zadrozny
- Department of Chemistry, Colorado State University, Fort Collins, CO 80523, USA
- Lead contact
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4
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A tetrairon(III) single-molecule magnet and its solvatomorphs: synthesis, crystal structures and vapor-phase processing. Inorganica Chim Acta 2022. [DOI: 10.1016/j.ica.2021.120698] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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5
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Cornia A, Mucci A, Briganti M, Bridonneau N, Nava A, Nicolini A. Stereoisomerism in Tetrametallic Propeller‐Like Complexes: A Solid‐State and Solution NMR Study on a Tetragallium(III) Derivative. Eur J Inorg Chem 2022. [DOI: 10.1002/ejic.202100873] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Andrea Cornia
- Dipartimento di Scienze Chimiche e Geologiche & UdR INSTM Università di Modena e Reggio Emilia Via G. Campi 103 41125 Modena Italy
| | - Adele Mucci
- Dipartimento di Scienze Chimiche e Geologiche & UdR INSTM Università di Modena e Reggio Emilia Via G. Campi 103 41125 Modena Italy
| | - Matteo Briganti
- Dipartimento di Chimica “U. Schiff” & UdR INSTM Università di Firenze Via della Lastruccia 3–13 50019 Sesto Fiorentino (FI) Italy
| | - Nathalie Bridonneau
- Dipartimento di Scienze Chimiche e Geologiche & UdR INSTM Università di Modena e Reggio Emilia Via G. Campi 103 41125 Modena Italy
- Institut de Chimie Moléculaire et des Matériaux d'Orsay Université Paris-Saclay CNRS, UMR 8182 91405 Orsay Cedex France
| | - Andrea Nava
- Dipartimento di Scienze Chimiche e Geologiche & UdR INSTM Università di Modena e Reggio Emilia Via G. Campi 103 41125 Modena Italy
- Dipartimento di Scienze Fisiche, Informatiche e Matematiche Università di Modena e Reggio Emilia Via G. Campi 213/a 41125 Modena Italy
| | - Alessio Nicolini
- Dipartimento di Scienze Chimiche e Geologiche & UdR INSTM Università di Modena e Reggio Emilia Via G. Campi 103 41125 Modena Italy
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6
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Rosado Piquer L, Dreiser J, Sañudo EC. Heterometallic Co-Dy SMMs grafted on iron oxide nanoparticles. Dalton Trans 2021; 50:9589-9597. [PMID: 34160526 DOI: 10.1039/d1dt01519b] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Heterometallic 3d-4f SMM [Co4Dy(OH)2(SALOH)5(chp)4(MeCN)(H2O)2] (1) has been deposited onto iron oxide nanoparticles (NPs) with an oleate self-assembled monolayer (SAM) as a surfactant. The obtained hybrid molecular-inorganic system 1-NP has been thoroughly characterized. The oleate SAM separates SMM 1 from the magnetic substrate to avoid the strong-coupling between the surface and molecule to ensure that 1 retains its magnetic properties in 1-NP. The magnetic properties of the hybrid system 1-NP have been characterized by element specific XMCD: the heterometallic SMM retains its magnetic properties on the surface of the iron oxide NPs while there is an enhancement of the magnetic properties of the NPs.
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Affiliation(s)
- Lidia Rosado Piquer
- Department of Inorganic and Organic Chemistry, Inorganic Chemistry Section, Universitat de Barcelona, Carrer Martí i Franquès 1-11, 08028 Barcelona, Spain. and Institut de Nanociència i Nanotecnologia IN2UB, Universitat de Barcelona, Carrer Martí i Franquès 1-11, 08028 Barcelona, Spain
| | - Jan Dreiser
- Swiss Light Source, Paul Scherrer Institut, Forschungsstrasse 111, 5232 Villigen PSI, Switzerland
| | - E Carolina Sañudo
- Department of Inorganic and Organic Chemistry, Inorganic Chemistry Section, Universitat de Barcelona, Carrer Martí i Franquès 1-11, 08028 Barcelona, Spain. and Institut de Nanociència i Nanotecnologia IN2UB, Universitat de Barcelona, Carrer Martí i Franquès 1-11, 08028 Barcelona, Spain
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7
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Serrano G, Poggini L, Briganti M, Sorrentino AL, Cucinotta G, Malavolti L, Cortigiani B, Otero E, Sainctavit P, Loth S, Parenti F, Barra AL, Vindigni A, Cornia A, Totti F, Mannini M, Sessoli R. Quantum dynamics of a single molecule magnet on superconducting Pb(111). NATURE MATERIALS 2020; 19:546-551. [PMID: 32066930 DOI: 10.1038/s41563-020-0608-9] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2019] [Accepted: 01/07/2020] [Indexed: 06/10/2023]
Abstract
Magnetic materials interfaced with superconductors may reveal new physical phenomena with potential for quantum technologies. The use of molecules as magnetic components has already shown great promise, but the diversity of properties offered by the molecular realm remains largely unexplored. Here we investigate a submonolayer of tetrairon(III) propeller-shaped single molecule magnets deposited on a superconducting lead surface. This material combination reveals a strong influence of the superconductor on the spin dynamics of the single molecule magnet. It is shown that the superconducting transition to the condensate state switches the single molecule magnet from a blocked magnetization state to a resonant quantum tunnelling regime. Our results open perspectives to control single molecule magnetism via superconductors and to use single molecule magnets as local probes of the superconducting state.
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Affiliation(s)
- Giulia Serrano
- Department of Chemistry 'Ugo Schiff' and INSTM Research Unit, University of Florence, Sesto Fiorentino, Italy.
- Department of Industrial Engineering and INSTM Research Unit, University of Florence, Florence, Italy.
| | - Lorenzo Poggini
- Department of Chemistry 'Ugo Schiff' and INSTM Research Unit, University of Florence, Sesto Fiorentino, Italy
| | - Matteo Briganti
- Department of Chemistry 'Ugo Schiff' and INSTM Research Unit, University of Florence, Sesto Fiorentino, Italy
- Departamento de Química, Universidade Federal do Paraná, Curitiba, Brazil
| | - Andrea Luigi Sorrentino
- Department of Chemistry 'Ugo Schiff' and INSTM Research Unit, University of Florence, Sesto Fiorentino, Italy
- Department of Industrial Engineering and INSTM Research Unit, University of Florence, Florence, Italy
| | - Giuseppe Cucinotta
- Department of Chemistry 'Ugo Schiff' and INSTM Research Unit, University of Florence, Sesto Fiorentino, Italy
| | - Luigi Malavolti
- Institute FMQ, University of Stuttgart & Max Planck Institute for Solid State Research, Stuttgart, Germany
| | - Brunetto Cortigiani
- Department of Chemistry 'Ugo Schiff' and INSTM Research Unit, University of Florence, Sesto Fiorentino, Italy
| | - Edwige Otero
- Synchrotron SOLEIL, L'Orme des Merisiers, Saint Aubin, France
| | - Philippe Sainctavit
- Synchrotron SOLEIL, L'Orme des Merisiers, Saint Aubin, France
- IMPMC, UMR7590 CNRS, Sorbonne Université, MNHN, Paris, France
| | - Sebastian Loth
- Institute FMQ, University of Stuttgart & Max Planck Institute for Solid State Research, Stuttgart, Germany
| | - Francesca Parenti
- Department of Chemical and Geological Sciences and INSTM Research Unit, University of Modena and Reggio Emilia, Modena, Italy
| | | | | | - Andrea Cornia
- Department of Chemical and Geological Sciences and INSTM Research Unit, University of Modena and Reggio Emilia, Modena, Italy
| | - Federico Totti
- Department of Chemistry 'Ugo Schiff' and INSTM Research Unit, University of Florence, Sesto Fiorentino, Italy
| | - Matteo Mannini
- Department of Chemistry 'Ugo Schiff' and INSTM Research Unit, University of Florence, Sesto Fiorentino, Italy
| | - Roberta Sessoli
- Department of Chemistry 'Ugo Schiff' and INSTM Research Unit, University of Florence, Sesto Fiorentino, Italy.
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8
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Cebulka R, Del Barco E. Sub-Kelvin (100 mK) time resolved electron paramagnetic resonance spectroscopy for studies of quantum dynamics of low-dimensional spin systems at low frequencies and magnetic fields. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2019; 90:085106. [PMID: 31472653 DOI: 10.1063/1.5097563] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2019] [Accepted: 07/22/2019] [Indexed: 06/10/2023]
Abstract
This article presents a time-resolved electron paramagnetic resonance spectrometry setup designed to work at frequencies below 20 GHz and temperatures down to 50 mK. The setup consists of an on-chip microstrip resonator (Q < 100) placed in a dilution cryostat located within a superconducting 3D vector magnet. A housemade spin echo circuitry controlled by a microwave network analyzer, a pulse pattern generator, and an oscilloscope connects to the microstrip through a series of copper, stainless steel, and superconducting semirigid coaxial lines which are thermally anchored to the different cooling stages of the fridge by means of power attenuators, circulators, and a cryogenic amplifier. Spin echo experiments were performed at a 0.5-T magnetic field on a spin 1 2 paramagnetic coal marker sample mounted on a 15 GHz microstrip resonator at temperatures ranging from 100 to 800 mK. The results show an increase in echo signal intensity as temperature is decreased until saturation as theoretically expected in reaching 99% spin polarization at 100 mK. Our technique allows tuning of the spin system in the pure-state regime and minimizing dipolar fluctuations, which are the main contribution to decoherence in solid-state samples of single-molecule magnets (SMMs) - molecular spin systems that are currently being tested for applications in quantum computation. The achievement of full spin polarization at 100 mK will allow for coherent control over the time evolution of spin systems without the need for large magnetic fields (commonly used to polarize the dipolar bath at higher temperatures) and high frequencies.
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Affiliation(s)
- Rebecca Cebulka
- Physics Department, University of Central Florida, Orlando, Florida 32816, USA
| | - Enrique Del Barco
- Physics Department, University of Central Florida, Orlando, Florida 32816, USA
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9
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Cornia A, Mannini M, Sessoli R, Gatteschi D. Propeller-Shaped Fe4
and Fe3
M Molecular Nanomagnets: A Journey from Crystals to Addressable Single Molecules. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201801266] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Andrea Cornia
- Department of Chemical and Geological Sciences and INSTM Research Unit; University of Modena and Reggio Emilia; 41125 Modena Italy
| | - Matteo Mannini
- Department of Chemistry “Ugo Schiff” and INSTM Research Unit; University of Florence; 50019 Sesto Fiorentino (FI) Italy
| | - Roberta Sessoli
- Department of Chemistry “Ugo Schiff” and INSTM Research Unit; University of Florence; 50019 Sesto Fiorentino (FI) Italy
- Research Area Firenze; Istituto di Chimica dei Composti Organometallici - ICCOM-CNR; 50019 Sesto Fiorentino (FI) Italy
| | - Dante Gatteschi
- Department of Chemistry “Ugo Schiff” and INSTM Research Unit; University of Florence; 50019 Sesto Fiorentino (FI) Italy
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10
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Zhang X, Su F, Guo W, Sañudo EC, Liu C. An Unusual Ln
III
‐Based Metal‐Organic Framework with Dinuclear Nodes Exhibiting Single‐Molecular Magnet Behavior. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201801183] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Xue‐Jing Zhang
- Henan Provincial Key Laboratory of Surface & Interface Science Secció de Química Inorgànica i Institut de Nanociència i Nanotecnologia Zhengzhou University of Light Industry 450002 Zhengzhou P. R. China
| | - Fang‐Zhe Su
- Henan Provincial Key Laboratory of Surface & Interface Science Secció de Química Inorgànica i Institut de Nanociència i Nanotecnologia Zhengzhou University of Light Industry 450002 Zhengzhou P. R. China
| | - Wan‐Ying Guo
- Henan Provincial Key Laboratory of Surface & Interface Science Secció de Química Inorgànica i Institut de Nanociència i Nanotecnologia Zhengzhou University of Light Industry 450002 Zhengzhou P. R. China
| | - E. Carolina Sañudo
- Departament de Química Inorgànica i Orgànica Secció de Química Inorgànica i Institut de Nanociència i Nanotecnologia Universitat de Barcelona C/Martí i Franqués 1‐11 08028 Barcelona SPAIN
| | - Chun‐Sen Liu
- Henan Provincial Key Laboratory of Surface & Interface Science Secció de Química Inorgànica i Institut de Nanociència i Nanotecnologia Zhengzhou University of Light Industry 450002 Zhengzhou P. R. China
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11
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Huang G, Fernandez-Garcia G, Badiane I, Camarra M, Freslon S, Guillou O, Daiguebonne C, Totti F, Cador O, Guizouarn T, Le Guennic B, Bernot K. Magnetic Slow Relaxation in a Metal-Organic Framework Made of Chains of Ferromagnetically Coupled Single-Molecule Magnets. Chemistry 2018; 24:6983-6991. [DOI: 10.1002/chem.201800095] [Citation(s) in RCA: 56] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2018] [Indexed: 11/11/2022]
Affiliation(s)
- Gang Huang
- Univ. Rennes, INSA Rennes, CNRS; ISCR (Institut des Sciences Chimiques de Rennes) UMR 6226; 35000 Rennes France
| | - Guglielmo Fernandez-Garcia
- Univ. Rennes, CNRS; ISCR (Institut des Sciences Chimiques de Rennes) UMR 6226; 35000 Rennes France
- Laboratory of Molecular Magnetism (LaMM); Università degli studi di Firenze, INSTM unit; Via della lastruccia 3 50019 Sesto Fiorentino Italy
| | - Insa Badiane
- Univ. Rennes, INSA Rennes, CNRS; ISCR (Institut des Sciences Chimiques de Rennes) UMR 6226; 35000 Rennes France
- LCPM-Groupe “Matériaux Inorganiques: Chimie Douce et Cristallographie”; Université Assane Seck de Ziguinchor; BP 523 Ziguinchor Sénégal
| | - Magatte Camarra
- Univ. Rennes, INSA Rennes, CNRS; ISCR (Institut des Sciences Chimiques de Rennes) UMR 6226; 35000 Rennes France
- LCPM-Groupe “Matériaux Inorganiques: Chimie Douce et Cristallographie”; Université Assane Seck de Ziguinchor; BP 523 Ziguinchor Sénégal
| | - Stéphane Freslon
- Univ. Rennes, INSA Rennes, CNRS; ISCR (Institut des Sciences Chimiques de Rennes) UMR 6226; 35000 Rennes France
| | - Olivier Guillou
- Univ. Rennes, INSA Rennes, CNRS; ISCR (Institut des Sciences Chimiques de Rennes) UMR 6226; 35000 Rennes France
| | - Carole Daiguebonne
- Univ. Rennes, INSA Rennes, CNRS; ISCR (Institut des Sciences Chimiques de Rennes) UMR 6226; 35000 Rennes France
| | - Federico Totti
- Laboratory of Molecular Magnetism (LaMM); Università degli studi di Firenze, INSTM unit; Via della lastruccia 3 50019 Sesto Fiorentino Italy
| | - Olivier Cador
- Univ. Rennes, CNRS; ISCR (Institut des Sciences Chimiques de Rennes) UMR 6226; 35000 Rennes France
| | - Thierry Guizouarn
- Univ. Rennes, CNRS; ISCR (Institut des Sciences Chimiques de Rennes) UMR 6226; 35000 Rennes France
| | - Boris Le Guennic
- Univ. Rennes, CNRS; ISCR (Institut des Sciences Chimiques de Rennes) UMR 6226; 35000 Rennes France
| | - Kevin Bernot
- Univ. Rennes, INSA Rennes, CNRS; ISCR (Institut des Sciences Chimiques de Rennes) UMR 6226; 35000 Rennes France
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12
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Fernandez Garcia G, Lunghi A, Totti F, Sessoli R. The disclosure of mesoscale behaviour of a 3d-SMM monolayer on Au(111) through a multilevel approach. NANOSCALE 2018; 10:4096-4104. [PMID: 29431791 DOI: 10.1039/c7nr06320b] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Here we present a computational study of a full- and a half-monolayer of a Fe4 single molecule magnet ([Fe4(L)2(dpm)6], where H3L = 2-hydroxymethyl-2-phenylpropane-1,3-diol and Hdpm = dipivaloylmethane, Fe4Ph) on an unreconstructed surface of Au(111). This has been possible through the application of an integrated approach, which allows the explicit inclusion of the packing effects in the classical dynamics to be used in a second step in periodic and non-periodic high level DFT calculations. In this way we can obtain access to mesoscale geometrical data and verify how they can influence the magnetic properties of interest of the single Fe4 molecule. The proposed approach allows to overcome the ab initio state-of-the-art approaches used to study Single Molecule Magnets (SMMs), which are based on the study of one single adsorbed molecule and cannot represent effects on the scale of a monolayer. Indeed, we show here that it is possible to go beyond the computational limitations inherent to the use, for such complex systems, of accurate calculation techniques (e.g. ab initio molecular dynamics) without losing the level of accuracy necessary to gain new detailed insights, hardly reachable at the experimental level. Indeed, long-range and edge effects on the Fe4 structures and their easy axis of magnetization orientations have been evidenced as their different contributions to the overall macroscopic behavior.
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Affiliation(s)
- Guglielmo Fernandez Garcia
- Università degli Studi di Firenze. Dipartimento di Chimica "Ugo Schiff", Via della Lastruccia 3-13, 50019, Sesto Fiorentino, FI, Italy.
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13
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Amjad A, Madalan AM, Andruh M, Caneschi A, Sorace L. Slow Relaxation of Magnetization in an Isostructural Series of Zinc-Lanthanide Complexes: An Integrated EPR and AC Susceptibility Study. Chemistry 2016; 22:12849-58. [DOI: 10.1002/chem.201601996] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2016] [Indexed: 11/05/2022]
Affiliation(s)
- Asma Amjad
- INSTM Research Unit - LAMM; Dipartimento di Chimica “U-Schiff”; Università di Firenze; via della Lastruccia, 3-13 Sesto Fiorentino (FI) 50019 Italy
| | - Augustin M. Madalan
- Inorganic Chemistry Laboratory; Faculty of Chemistry; University of Bucharest; Str. Dumbrava Rosie nr. 23 020464- Bucharest Romania
| | - Marius Andruh
- Inorganic Chemistry Laboratory; Faculty of Chemistry; University of Bucharest; Str. Dumbrava Rosie nr. 23 020464- Bucharest Romania
| | - Andrea Caneschi
- INSTM Research Unit - LAMM; Dipartimento di Chimica “U-Schiff”; Università di Firenze; via della Lastruccia, 3-13 Sesto Fiorentino (FI) 50019 Italy
| | - Lorenzo Sorace
- INSTM Research Unit - LAMM; Dipartimento di Chimica “U-Schiff”; Università di Firenze; via della Lastruccia, 3-13 Sesto Fiorentino (FI) 50019 Italy
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14
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Rigamonti L, Cotton C, Nava A, Lang H, Rüffer T, Perfetti M, Sorace L, Barra AL, Lan Y, Wernsdorfer W, Sessoli R, Cornia A. Diamondoid Structure in a Metal-Organic Framework of Fe4Single-Molecule Magnets. Chemistry 2016; 22:13705-14. [DOI: 10.1002/chem.201601383] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2016] [Revised: 05/11/2016] [Indexed: 12/20/2022]
Affiliation(s)
- Luca Rigamonti
- Dipartimento di Scienze Chimiche e Geologiche; Università degli Studi di Modena e Reggio Emilia & INSTM RU of Modena and Reggio Emilia; via G. Campi 103 41125 Modena Italy
| | - Carri Cotton
- Dipartimento di Scienze Chimiche e Geologiche; Università degli Studi di Modena e Reggio Emilia & INSTM RU of Modena and Reggio Emilia; via G. Campi 103 41125 Modena Italy
- Department of Chemistry; University of Warwick, Gibbet Hill; Coventry CV4 7AL UK
| | - Andrea Nava
- Dipartimento di Scienze Chimiche e Geologiche; Università degli Studi di Modena e Reggio Emilia & INSTM RU of Modena and Reggio Emilia; via G. Campi 103 41125 Modena Italy
- Dipartimento di Scienze Fisiche, Informatiche e Matematiche; Università degli Studi di Modena e Reggio Emilia; via G. Campi 213/a 41125 Modena Italy
| | - Heinrich Lang
- TU Chemnitz; Fakultät für Naturwissenschaften; Institut für Chemie, Anorganische Chemie; Chemnitz 09107 Germany
| | - Tobias Rüffer
- TU Chemnitz; Fakultät für Naturwissenschaften; Institut für Chemie, Anorganische Chemie; Chemnitz 09107 Germany
| | - Mauro Perfetti
- Laboratory of Molecular Magnetism (LAMM); Dipartimento di Chimica ‘Ugo Schiff'; Università degli Studi di Firenze & INSTM RU of Firenze; via della Lastruccia 3-13 50019 Sesto Fiorentino (FI) Italy
| | - Lorenzo Sorace
- Laboratory of Molecular Magnetism (LAMM); Dipartimento di Chimica ‘Ugo Schiff'; Università degli Studi di Firenze & INSTM RU of Firenze; via della Lastruccia 3-13 50019 Sesto Fiorentino (FI) Italy
| | - Anne-Laure Barra
- Laboratoire National des Champs Magnétiques Intenses (LNCMI); CNRS; 25 Avenue des Martyrs, BP 166 38042 Grenoble CEDEX 9 France
| | - Yanhua Lan
- Institut Néel; CNRS; 25 Avenue des Martyrs, BP 166 38042 Grenoble Cedex 9 France
| | - Wolfgang Wernsdorfer
- Institut Néel; CNRS; 25 Avenue des Martyrs, BP 166 38042 Grenoble Cedex 9 France
| | - Roberta Sessoli
- Laboratory of Molecular Magnetism (LAMM); Dipartimento di Chimica ‘Ugo Schiff'; Università degli Studi di Firenze & INSTM RU of Firenze; via della Lastruccia 3-13 50019 Sesto Fiorentino (FI) Italy
| | - Andrea Cornia
- Dipartimento di Scienze Chimiche e Geologiche; Università degli Studi di Modena e Reggio Emilia & INSTM RU of Modena and Reggio Emilia; via G. Campi 103 41125 Modena Italy
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15
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Cervetti C, Rettori A, Pini MG, Cornia A, Repollés A, Luis F, Dressel M, Rauschenbach S, Kern K, Burghard M, Bogani L. The classical and quantum dynamics of molecular spins on graphene. NATURE MATERIALS 2016; 15:164-8. [PMID: 26641019 PMCID: PMC4800001 DOI: 10.1038/nmat4490] [Citation(s) in RCA: 72] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2014] [Accepted: 10/05/2015] [Indexed: 05/05/2023]
Abstract
Controlling the dynamics of spins on surfaces is pivotal to the design of spintronic and quantum computing devices. Proposed schemes involve the interaction of spins with graphene to enable surface-state spintronics and electrical spin manipulation. However, the influence of the graphene environment on the spin systems has yet to be unravelled. Here we explore the spin-graphene interaction by studying the classical and quantum dynamics of molecular magnets on graphene. Whereas the static spin response remains unaltered, the quantum spin dynamics and associated selection rules are profoundly modulated. The couplings to graphene phonons, to other spins, and to Dirac fermions are quantified using a newly developed model. Coupling to Dirac electrons introduces a dominant quantum relaxation channel that, by driving the spins over Villain's threshold, gives rise to fully coherent, resonant spin tunnelling. Our findings provide fundamental insight into the interaction between spins and graphene, establishing the basis for electrical spin manipulation in graphene nanodevices.
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Affiliation(s)
- Christian Cervetti
- 1. Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, D-70550 Stuttgart (Germany)
| | - Angelo Rettori
- Dipartimento di Fisica, Università di Firenze, Via G. Sansone 1, I-50019 Sesto Fiorentino (Italy)
| | - Maria Gloria Pini
- Istituto dei Sistemi Complessi, CNR, Unità di Firenze, Via Madonna del Piano 10, I-50019 Sesto Fiorentino (Italy)
| | - Andrea Cornia
- Dipartimento di Scienze Chimiche e Geologiche, Università di Modena e Reggio Emilia, INSTM RU, Via G. Campi 183, I-41125 Modena (Italy)
| | - Ana Repollés
- Instituto de Ciencia de Materiales de Aragón, CSIC-Universidad de Zaragoza, C/ Pedro Cerbuna 12, E-50009 Zaragoza (Spain)
| | - Fernando Luis
- Instituto de Ciencia de Materiales de Aragón, CSIC-Universidad de Zaragoza, C/ Pedro Cerbuna 12, E-50009 Zaragoza (Spain)
| | - Martin Dressel
- 1. Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, D-70550 Stuttgart (Germany)
| | - Stephan Rauschenbach
- Max-Planck-Institut für Festkörperforschung, Heisenbergstrasse 1, D-70569 Stuttgart (Germany)
| | - Klaus Kern
- Max-Planck-Institut für Festkörperforschung, Heisenbergstrasse 1, D-70569 Stuttgart (Germany)
- Institut de Physique de la Matière Condensée, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, (Switzerland)
| | - Marko Burghard
- Max-Planck-Institut für Festkörperforschung, Heisenbergstrasse 1, D-70569 Stuttgart (Germany)
| | - Lapo Bogani
- 1. Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, D-70550 Stuttgart (Germany)
- Department of Materials, University of Oxford, 16 Parks Road, OX1 3PH Oxford, (United Kingdom)
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16
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Ghirri A, Chiesa A, Carretta S, Troiani F, van Tol J, Hill S, Vitorica-Yrezabal I, Timco GA, Winpenny REP, Affronte M. Coherent Spin Dynamics in Molecular Cr8Zn Wheels. J Phys Chem Lett 2015; 6:5062-6. [PMID: 26633293 DOI: 10.1021/acs.jpclett.5b02527] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Controlling and understanding transitions between molecular spin states allows selection of the most suitable ones for qubit encoding. Here we present a detailed investigation of single crystals of a polynuclear Cr8Zn molecular wheel using 241 GHz electron paramagnetic resonance (EPR) spectroscopy in high magnetic field. Continuous wave spectra are well reproduced by spin Hamiltonian calculations, which evidence that transitions in correspondence to a well-defined anticrossing involve mixed states with different total spin. We studied, by means of spin echo experiments, the temperature dependence of the dephasing time (T2) down to 1.35 K. These results are reproduced by considering both hyperfine and intermolecular dipolar interactions, evidencing that the dipolar contribution is completely suppressed at the lowest temperature. Overall, these results shed light on the effects of the decoherence mechanisms, whose understanding is crucial to exploit chemically engineered molecular states as a resource for quantum information processing.
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Affiliation(s)
- Alberto Ghirri
- Istituto Nanoscienze-CNR , via G. Campi 213A, 41125 Modena, Italy
| | - Alessandro Chiesa
- Dipartimento di Fisica e Scienze della Terra, Università di Parma , Parco Area delle Scienze 7/a, 43123 Parma, Italy
| | - Stefano Carretta
- Dipartimento di Fisica e Scienze della Terra, Università di Parma , Parco Area delle Scienze 7/a, 43123 Parma, Italy
| | - Filippo Troiani
- Istituto Nanoscienze-CNR , via G. Campi 213A, 41125 Modena, Italy
| | - Johan van Tol
- National High Magnetic Field Laboratory , Tallahassee, Florida 32310, United States
| | - Stephen Hill
- National High Magnetic Field Laboratory , Tallahassee, Florida 32310, United States
- Department of Physics, Florida State University , Tallahassee, Florida 32306, United States
| | - Inigo Vitorica-Yrezabal
- School of Chemistry, University of Manchester , Oxford Road, Manchester M13 9PL, United Kingdom
| | - Grigore A Timco
- School of Chemistry, University of Manchester , Oxford Road, Manchester M13 9PL, United Kingdom
| | - Richard E P Winpenny
- School of Chemistry, University of Manchester , Oxford Road, Manchester M13 9PL, United Kingdom
| | - Marco Affronte
- Istituto Nanoscienze-CNR , via G. Campi 213A, 41125 Modena, Italy
- Dipartimento di Scienze Fisiche, Informatiche e Matematiche, Università di Modena e Reggio Emilia , via Campi 213A, 41125 Modena, Italy
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17
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Pointillart F, le Guennic B, Cador O, Maury O, Ouahab L. Lanthanide ion and tetrathiafulvalene-based ligand as a "magic" couple toward luminescence, single molecule magnets, and magnetostructural correlations. Acc Chem Res 2015; 48:2834-42. [PMID: 26492407 DOI: 10.1021/acs.accounts.5b00296] [Citation(s) in RCA: 116] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The synthesis of molecules featuring different properties is a perpetual challenge for the chemists' community. The coexistence and even more the synergy of those properties open new perspectives in the field of molecular devices and molecular electronics. In that sense, coordination chemistry contributed to the development of new functional molecules through, for instance, single-molecule magnets (SMMs) and light emitting molecules with potential applications in high capacity data storage and OLEDs, respectively. The appealing combination of both electronic properties into one single object may offer the possibility to have magnetized luminescent entities at nanometric scale. To that end, lanthanides seem to be one of the key ingredients since their peculiar electronic structures endow them with specific magnetic and luminescence properties. Indeed, lanthanides cover a wide range of emission wavelengths, from infrared to UV, which add up to a large variety of magnetic behaviors, from the fully isotropic spin (e.g., Gd(III)) to highly anisotropic magnetic moments (e.g., Dy(III)). In lanthanide complexes, ligands play a fundamental role because on one hand they govern the orientation of the magnetic moment of anisotropic lanthanides and on the other hand they can sensitize efficiently the luminescence. The design of appropriate organic ligands to elaborate such chemical objects with the desired property appears to be essential but remains a perpetual challenge. In this Account, we describe the design of lanthanide-based complexes that emit light, behave as SMMs, or combine both properties. We have paid peculiar attention to the design of ligands based on the tetrathiafulvalene (TTF) moiety. TTF and its derivatives are well-known chemical entities, stable at different oxidation states, and employed mainly in the synthesis of molecular conductors and superconductors. In addition to their redox properties, TTF-based derivatives act as organic chromophores for the sensitization of visible and near-infrared (NIR) luminescence of lanthanides. The mechanism of sensitization involves either antenna effect (energy transfer from the excited state) or photoinduced electron transfer. TTF-based ligands act also as structural agents in the conception of SMM in crystals. Such objects are obtained with the highly anisotropic Dy(III) ion in crystalline phase as well as in frozen solution with magnetic memory at helium-4 temperature (4 K). We highlight the influence of the magnetic dilution (both in amorphous solution and in diamagnetic crystalline matrix) and, particular case of dysprosium based SMMs, the effect of metal-centered isotope enrichment on the SMM properties. Our aim is not only to realize functional molecules but to rationalize both luminescence and magnetic properties on the basis of the structure of the molecules. These two properties are intimately intricate and governed by the electronic structure, which can be calculated and interpreted using modern quantum chemistry tools.
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Affiliation(s)
- Fabrice Pointillart
- Institut
des Sciences Chimiques de Rennes UMR 6226 CNRS-UR1, Université de Rennes 1, 35042 Cedex Rennes, France
| | - Boris le Guennic
- Institut
des Sciences Chimiques de Rennes UMR 6226 CNRS-UR1, Université de Rennes 1, 35042 Cedex Rennes, France
| | - Olivier Cador
- Institut
des Sciences Chimiques de Rennes UMR 6226 CNRS-UR1, Université de Rennes 1, 35042 Cedex Rennes, France
| | - Olivier Maury
- Laboratoire
de Chimie, UMR 5182 CNRS-ENS Lyon, Université Lyon 1, 46 Allée
d’Italie, 69364 Cedex 07 Lyon, France
| | - Lahcène Ouahab
- Institut
des Sciences Chimiques de Rennes UMR 6226 CNRS-UR1, Université de Rennes 1, 35042 Cedex Rennes, France
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18
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Wang JJ, Sun J, Yang M, Li LC. Tuning Magnetic Relaxation in a Tb-Nitronyl Nitroxide Complex by Using Cocrystalline Paramagnetic Complex. Inorg Chem 2015; 54:11307-13. [DOI: 10.1021/acs.inorgchem.5b01915] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Juan-Juan Wang
- Department
of Chemistry, Key Laboratory of Advanced Energy Materials Chemistry
and Tianjin Key Laboratory of Metal and Molecule-based Material Chemistry, Nankai University, Tianjin 300071, China
| | - Juan Sun
- Department
of Chemistry, Key Laboratory of Advanced Energy Materials Chemistry
and Tianjin Key Laboratory of Metal and Molecule-based Material Chemistry, Nankai University, Tianjin 300071, China
| | - Meng Yang
- Department
of Chemistry, Key Laboratory of Advanced Energy Materials Chemistry
and Tianjin Key Laboratory of Metal and Molecule-based Material Chemistry, Nankai University, Tianjin 300071, China
| | - Li-Cun Li
- Department
of Chemistry, Key Laboratory of Advanced Energy Materials Chemistry
and Tianjin Key Laboratory of Metal and Molecule-based Material Chemistry, Nankai University, Tianjin 300071, China
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19
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Nava A, Rigamonti L, Zangrando E, Sessoli R, Wernsdorfer W, Cornia A. Redox-Controlled Exchange Bias in a Supramolecular Chain of Fe4Single-Molecule Magnets. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201500897] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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20
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Nava A, Rigamonti L, Zangrando E, Sessoli R, Wernsdorfer W, Cornia A. Redox-Controlled Exchange Bias in a Supramolecular Chain of Fe4 Single-Molecule Magnets. Angew Chem Int Ed Engl 2015; 54:8777-82. [PMID: 26096860 DOI: 10.1002/anie.201500897] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2015] [Revised: 03/10/2015] [Indexed: 11/09/2022]
Abstract
Tetrairon(III) single-molecule magnets [Fe4(pPy)2(dpm)6] (1) (H3pPy=2-(hydroxymethyl)-2-(pyridin-4-yl)propane-1,3-diol, Hdpm=dipivaloylmethane) have been deliberately organized into supramolecular chains by reaction with Ru(II)Ru(II) or Ru(II)Ru(III) paddlewheel complexes. The products [Fe4(pPy)2(dpm)6][Ru2(OAc)4](BF4)x with x=0 (2 a) or x=1 (2 b) differ in the electron count on the paramagnetic diruthenium bridges and display hysteresis loops of substantially different shape. Owing to their large easy-plane anisotropy, the s=1 diruthenium(II,II) units in 2 a act as effective s(eff)=0 spins and lead to negligible intrachain communication. By contrast, the mixed-valent bridges (s=3/2, s(eff)=1/2) in 2 b introduce a significant exchange bias, with concomitant enhancement of the remnant magnetization. Our results suggest the possibility to use electron transfer to tune intermolecular communication in redox-responsive arrays of SMMs.
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Affiliation(s)
- Andrea Nava
- Dipartimento di Scienze Chimiche e Geologiche, Università di Modena e Reggio Emilia & INSTM RU of Modena and Reggio Emilia via G. Campi 183, 41125 Modena (Italy) http://www.corniagroup.unimore.it.,Dipartimento di Scienze Fisiche, Informatiche e Matematiche, Università di Modena e Reggio Emilia, 41125 Modena (Italy)
| | - Luca Rigamonti
- Dipartimento di Scienze Chimiche e Geologiche, Università di Modena e Reggio Emilia & INSTM RU of Modena and Reggio Emilia via G. Campi 183, 41125 Modena (Italy) http://www.corniagroup.unimore.it
| | - Ennio Zangrando
- Dipartimento di Scienze Chimiche e Farmaceutiche, Università di Trieste, 34127 Trieste (Italy)
| | - Roberta Sessoli
- Laboratory of Molecular Magnetism (LAMM), Dipartimento di Chimica "Ugo Schiff", Università di Firenze & INSTM RU of Florence, 50019 Sesto Fiorentino (Italy)
| | | | - Andrea Cornia
- Dipartimento di Scienze Chimiche e Geologiche, Università di Modena e Reggio Emilia & INSTM RU of Modena and Reggio Emilia via G. Campi 183, 41125 Modena (Italy) http://www.corniagroup.unimore.it.
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21
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Malavolti L, Lanzilotto V, Ninova S, Poggini L, Cimatti I, Cortigiani B, Margheriti L, Chiappe D, Otero E, Sainctavit P, Totti F, Cornia A, Mannini M, Sessoli R. Magnetic bistability in a submonolayer of sublimated Fe4 single-molecule magnets. NANO LETTERS 2015; 15:535-541. [PMID: 25489967 DOI: 10.1021/nl503925h] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We demonstrate that Fe4 molecules can be deposited on gold by thermal sublimation in ultra-high vacuum with retention of single molecule magnet behavior. A magnetic hysteresis comparable to that found in bulk samples is indeed observed when a submonolayer film is studied by X-ray magnetic circular dichroism. Scanning tunneling microscopy evidences that Fe4 molecules are assembled in a two-dimensional lattice with short-range hexagonal order and coexist with a smaller contaminant. The presence of intact Fe4 molecules and the retention of their bistable magnetic behavior on the gold surface are supported by density functional theory calculations.
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Affiliation(s)
- Luigi Malavolti
- Department of Chemistry "Ugo Schiff" and INSTM Research Unit, University of Florence , 50019 Sesto Fiorentino, Italy
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22
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Pointillart F, Bernot K, Golhen S, Le Guennic B, Guizouarn T, Ouahab L, Cador O. Magnetic Memory in an Isotopically Enriched and Magnetically Isolated Mononuclear Dysprosium Complex. Angew Chem Int Ed Engl 2014; 54:1504-7. [DOI: 10.1002/anie.201409887] [Citation(s) in RCA: 172] [Impact Index Per Article: 17.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2014] [Indexed: 11/11/2022]
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23
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Pointillart F, Bernot K, Golhen S, Le Guennic B, Guizouarn T, Ouahab L, Cador O. Magnetic Memory in an Isotopically Enriched and Magnetically Isolated Mononuclear Dysprosium Complex. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201409887] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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24
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Jung J, Cador O, Bernot K, Pointillart F, Luzon J, Le Guennic B. Influence of the supramolecular architecture on the magnetic properties of a Dy(III) single-molecule magnet: an ab initio investigation. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2014; 5:2267-2274. [PMID: 25551055 PMCID: PMC4273297 DOI: 10.3762/bjnano.5.236] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/24/2014] [Accepted: 10/05/2014] [Indexed: 06/04/2023]
Abstract
Single-crystal angular-resolved magnetometry and wavefunction-based calculations have been used to reconsider the magnetic properties of a recently reported Dy(III)-based single-molecule magnet, namely [Dy(hfac)3(L(1))] with hfac(-) = 1,1,1,5,5,5-hexafluoroacetylacetonate and L(1) = 2-(4,5-bis(propylthio)-1,3-dithiol-2-ylidene)-6-(pyridin-2-yl)-5H-[1,3]dithiolo[4',5':4,5]benzo[1,2-d]imidazole. The magnetic susceptibility and magnetization at low temperature are found to be strongly influenced by supramolecular interactions. Moreover, taking into account the hydrogen-bond networks in the calculations allows to explain the orientation of the magnetic axes. This strongly suggests that hydrogen bonds play an important role in the modulation of the electrostatic environment around the Dy(III) center that governs the nature of its magnetic ground-state and the orientation of its anisotropy axes. We thus show here that SMM properties that rely on supramolecular organization may not be transferable into single-molecule devices.
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Affiliation(s)
- Julie Jung
- Institut des Sciences Chimiques de Rennes, UMR 6226 CNRS - Université de Rennes 1, 263 Avenue du Général Leclerc, 35042 Rennes Cedex, France
| | - Olivier Cador
- Institut des Sciences Chimiques de Rennes, UMR 6226 CNRS - Université de Rennes 1, 263 Avenue du Général Leclerc, 35042 Rennes Cedex, France
| | - Kevin Bernot
- INSA, ISCR, UMR 6226, Université Européenne de Bretagne, 35708 Rennes, France
| | - Fabrice Pointillart
- Institut des Sciences Chimiques de Rennes, UMR 6226 CNRS - Université de Rennes 1, 263 Avenue du Général Leclerc, 35042 Rennes Cedex, France
| | - Javier Luzon
- Instituto de Ciencia de Materiales de Aragon, CSIC–Universidad de Zaragoza, Pedro Cerbuna 12, 50009 Zaragoza, Spain
- Centro Universitario de la Defensa, Academia General Militar, Zaragoza, Spain
| | - Boris Le Guennic
- Institut des Sciences Chimiques de Rennes, UMR 6226 CNRS - Université de Rennes 1, 263 Avenue du Général Leclerc, 35042 Rennes Cedex, France
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25
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Westrup KCM, Boulon M, Totaro P, Nunes GG, Back DF, Barison A, Jackson M, Paulsen C, Gatteschi D, Sorace L, Cornia A, Soares JF, Sessoli R. Adding Remnant Magnetization and Anisotropic Exchange to Propeller‐like Single‐Molecule Magnets through Chemical Design. Chemistry 2014; 20:13681-91. [PMID: 25200792 DOI: 10.1002/chem.201403361] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2014] [Indexed: 11/06/2022]
Affiliation(s)
- Kátia Cristina M. Westrup
- Departamento de Química, Universidade Federal do Paraná, Centro Politécnico, 81530‐900, Curitiba‐PR (Brazil)
| | - Marie‐Emmanuelle Boulon
- Dipartimento di Chimica Ugo Schiff & UdR INSTM, Università degli Studi di Firenze, Via della Lastruccia 3–13, 50019 Sesto Fiorentino (Italy)
| | - Pasquale Totaro
- Dipartimento di Chimica Ugo Schiff & UdR INSTM, Università degli Studi di Firenze, Via della Lastruccia 3–13, 50019 Sesto Fiorentino (Italy)
| | - Giovana G. Nunes
- Departamento de Química, Universidade Federal do Paraná, Centro Politécnico, 81530‐900, Curitiba‐PR (Brazil)
| | - Davi F. Back
- Departamento de Química, Universidade Federal de Santa Maria, Camobi, 97105‐900, Santa Maria‐RS (Brazil)
| | - Andersson Barison
- Departamento de Química, Universidade Federal do Paraná, Centro Politécnico, 81530‐900, Curitiba‐PR (Brazil)
| | - Martin Jackson
- Institut Néel CNRS & Université J. Fourier, 25 rue des Martyrs, 38042 Grenoble (France)
- Current address: Faculty of Mathematics and Physics, Charles University, Ke Karlovu 3, 121 16 Prague (Czech Republic)
| | - Carley Paulsen
- Institut Néel CNRS & Université J. Fourier, 25 rue des Martyrs, 38042 Grenoble (France)
| | - Dante Gatteschi
- Dipartimento di Chimica Ugo Schiff & UdR INSTM, Università degli Studi di Firenze, Via della Lastruccia 3–13, 50019 Sesto Fiorentino (Italy)
| | - Lorenzo Sorace
- Dipartimento di Chimica Ugo Schiff & UdR INSTM, Università degli Studi di Firenze, Via della Lastruccia 3–13, 50019 Sesto Fiorentino (Italy)
| | - Andrea Cornia
- Dipartimento di Scienze Chimiche e Geologiche & UdR INSTM, Università degli Studi di Modena e Reggio Emilia, Via G. Campi 183, 41125 Modena (Italy)
| | - Jaísa F. Soares
- Departamento de Química, Universidade Federal do Paraná, Centro Politécnico, 81530‐900, Curitiba‐PR (Brazil)
| | - Roberta Sessoli
- Dipartimento di Chimica Ugo Schiff & UdR INSTM, Università degli Studi di Firenze, Via della Lastruccia 3–13, 50019 Sesto Fiorentino (Italy)
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26
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Cucos P, Tuna F, Sorace L, Matei I, Maxim C, Shova S, Gheorghe R, Caneschi A, Hillebrand M, Andruh M. Magnetic and Luminescent Binuclear Double-Stranded Helicates. Inorg Chem 2014; 53:7738-47. [DOI: 10.1021/ic501051q] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Paula Cucos
- Faculty
of Chemistry, Inorganic Chemistry Laboratory, University of Bucharest, Str. Dumbrava Rosie no. 23, 020464 Bucharest, Romania
| | - Floriana Tuna
- National
EPR Research Facility, School of Chemistry and Photon Science Institute, University of Manchester, Oxford Road, Manchester, M13 9PL, U.K
| | - Lorenzo Sorace
- Department
of Chemistry “U. Schiff” and INSTM RU, University of Florence, Via della Lastruccia 3, 50019 Sesto Fiorentino (FI), Italy
| | - Iulia Matei
- Department
of Physical Chemistry, University of Bucharest, Bd. Regina Elisabeta 4-12, 030018 Bucharest, Romania
| | - Catalin Maxim
- Faculty
of Chemistry, Inorganic Chemistry Laboratory, University of Bucharest, Str. Dumbrava Rosie no. 23, 020464 Bucharest, Romania
| | - Sergiu Shova
- “Petru Poni” Institute of Macromolecular Chemistry, Aleea Grigore Ghica Voda 41A, RO-700487 Iasi, Romania
| | - Ruxandra Gheorghe
- Faculty
of Chemistry, Inorganic Chemistry Laboratory, University of Bucharest, Str. Dumbrava Rosie no. 23, 020464 Bucharest, Romania
| | - Andrea Caneschi
- Department
of Chemistry “U. Schiff” and INSTM RU, University of Florence, Via della Lastruccia 3, 50019 Sesto Fiorentino (FI), Italy
| | - Mihaela Hillebrand
- Department
of Physical Chemistry, University of Bucharest, Bd. Regina Elisabeta 4-12, 030018 Bucharest, Romania
| | - Marius Andruh
- Faculty
of Chemistry, Inorganic Chemistry Laboratory, University of Bucharest, Str. Dumbrava Rosie no. 23, 020464 Bucharest, Romania
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Moro F, Kaminski D, Tuna F, Whitehead GFS, Timco GA, Collison D, Winpenny REP, Ardavan A, McInnes EJL. Coherent electron spin manipulation in a dilute oriented ensemble of molecular nanomagnets: pulsed EPR on doped single crystals. Chem Commun (Camb) 2014; 50:91-3. [DOI: 10.1039/c3cc46326e] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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Cornia A, Mannini M. Single-Molecule Magnets on Surfaces. MOLECULAR NANOMAGNETS AND RELATED PHENOMENA 2014. [DOI: 10.1007/430_2014_150] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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Totaro P, Westrup KCM, Boulon ME, Nunes GG, Back DF, Barison A, Ciattini S, Mannini M, Sorace L, Soares JF, Cornia A, Sessoli R. A new approach to the synthesis of heteronuclear propeller-like single molecule magnets. Dalton Trans 2013; 42:4416-26. [PMID: 23280320 DOI: 10.1039/c2dt32618c] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- Pasquale Totaro
- Dipartimento di Chimica Ugo Schiff and INSTM RU, Università degli Studi di Firenze, Via della Lastruccia 3-13, 50019 Sesto Fiorentino-FI, Italy
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Hofmann A, Salman Z, Mannini M, Amato A, Malavolti L, Morenzoni E, Prokscha T, Sessoli R, Suter A. Depth-dependent spin dynamics in thin films of TbPc2 nanomagnets explored by low-energy implanted muons. ACS NANO 2012; 6:8390-8396. [PMID: 22917162 DOI: 10.1021/nn3031673] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
We present measurements of the magnetic properties of thin film TbPc(2) single-molecule magnets evaporated on a gold substrate and compare them to those in bulk. Zero-field muon spin relaxation measurements were used to determine the molecular spin fluctuation rate of TbPc(2) as a function of temperature. At low temperature, we find that the fluctuations in films are much faster than in bulk and depend strongly on the distance between the molecules and the Au substrate. We measure a molecular spin correlation time that varies between 1.4 μs near the substrate and 6.6 μs far away from it. We attribute this behavior to differences in the packing of the magnetic cores, which change gradually on the scale of ~10-20 nm away from the TbPc(2)/Au interface.
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Affiliation(s)
- Andrea Hofmann
- Laboratory for Muon Spin Spectroscopy, Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland
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