The solvent effect in an axially symmetric FeIII4 single-molecule magnet

2014 ◽  
Vol 50 (95) ◽  
pp. 15090-15093 ◽  
Author(s):  
Yuan-Yuan Zhu ◽  
Ting-Ting Yin ◽  
Shang-Da Jiang ◽  
Anne-Laure Barra ◽  
Wolfgang Wernsdorfer ◽  
...  
Keyword(s):  
Solvent Effect ◽  
Single Molecule ◽  
Axial Symmetry ◽  
Axially Symmetric ◽  
Single Molecule Magnet ◽  
Solvent Molecules

The axial symmetry of an FeIII4 SMM is broken by the interaction of the molecule with the disordered solvent molecules.

scholarly journals Lanthanoid-Anilato Complexes and Lattices

2020 ◽  
Vol 6 (4) ◽  
pp. 71
Author(s):  
Samia Benmansour ◽  
Carlos J. Gómez-García
Keyword(s):  
Thin Films ◽  
Magnetic Properties ◽  
Single Molecule ◽  
Exchange Capacity ◽  
Single Molecule Magnet ◽  
Structural Types ◽  
Group 3 ◽  
Solvent Molecules ◽  
Solvent Adsorption ◽  
2D And 3D

In this review, we describe all the structurally characterized complexes containing lanthanoids (Ln, including La and group 3 metals: Y and Lu) and any anilato-type ligand (3,6-disubstituted-2,5-dihydroxy-1,4-benzoquinone dianion = C6O4X22−). We present all the anilato-Ln compounds including those where, besides the anilato-type ligand, there is one or more coligands or solvent molecules coordinated to the lanthanoid ions. We show the different structural types observed in these compounds: from discrete monomers, dimers and tetramers to extended 1D, 2D and 3D lattices with different topologies. We also revise the magnetic properties of these Ln-anilato compounds, including single-molecule magnet (SMM) and single-ion magnet (SIM) behaviours. Finally, we show the luminescent and electrochemical properties of some of them, their gas/solvent adsorption/absorption and exchange capacity and the attempts to prepare them as thin films.

scholarly journals Reversible Switching of Single-Molecule Magnetic Behaviour by Desorption/Adsorption of Solvent Ligand in a New Dy(III)-Based Metal Organic Framework

2021 ◽  
Vol 9 ◽  
Author(s):  
Xiao-Jiao Song ◽  
Zhao-Bo Hu ◽  
Miao-Miao Li ◽  
Xin Feng ◽  
Ming Kong ◽  
...  
Keyword(s):  
Single Molecule ◽  
Applied Field ◽  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
Magnetic Behaviour ◽  
Zero Field ◽  
Single Molecule Magnet ◽  
Slow Magnetic Relaxation ◽  
Metal Organic ◽  
Solvent Molecules

Two metal-organic frameworks (MOFs), [Dy(BDC)(NO3)(DMF)2]n (1, H2BDC = terephthalic acid) and [Dy(BDC)(NO3)]n (1a), were synthesized. The structures of MOFs 1 and 1a are easy to be reversibly transformed into each other by the desorption or adsorption of coordination solvent molecules. Accordingly, their magnetic properties can also be changed reversibly, which realizes our goals of manipulating on/off single-molecule magnet behaviour. MOF 1 behaves as a single-molecule magnet either with or without DC field. Contrarily, no slow magnetic relaxation was observed in 1a both under zero field and applied field.

Terminal solvent effects on the anisotropy barriers of Dy2 systems

2016 ◽  
Vol 45 (42) ◽  
pp. 16709-16715 ◽  
Author(s):  
Y. Jiang ◽  
G. Brunet ◽  
R. J. Holmberg ◽  
F. Habib ◽  
I. Korobkov ◽  
...  
Keyword(s):  
Single Molecule ◽  
Solvent Effects ◽  
Magnetic Relaxation ◽  
Single Molecule Magnet ◽  
Relaxation Properties ◽  
Slow Magnetic Relaxation ◽  
Solvent Molecules

A family of three dinuclear dysprosium complexes, all of which exhibit single-molecule magnet behaviour under zero applied dc fields, have exemplified that terminally bonded solvent molecules can drastically impact slow magnetic relaxation properties.

Synthesis, Structure, and Spectroscopic and Magnetic Characterization of [Mn12O12(O2CCH2But)16(MeOH)4]·MeOH, a Mn12 Single-Molecule Magnet with True Axial Symmetry

2012 ◽  
Vol 52 (1) ◽  
pp. 258-272 ◽  
Author(s):  
Christos Lampropoulos ◽  
Muralee Murugesu ◽  
Andrew G. Harter ◽  
Wolfgang Wernsdofer ◽  
Stephen Hill ◽  
...  
Keyword(s):  
Single Molecule ◽  
Axial Symmetry ◽  
Magnetic Characterization ◽  
Single Molecule Magnet

Exchange-Biasing in a Dinuclear Dysprosium(III) Single-Molecule Magnet with a Large Energy Barrier for Magnetization Reversal

2019 ◽  
Author(s):  
Tian Han ◽  
Marcus J. Giansiracusa ◽  
Zi-Han Li ◽  
You-Song Ding ◽  
Nicholas F. Chilton ◽  
...  
Keyword(s):  
Single Molecule ◽  
Magnetization Reversal ◽  
Energy Barrier ◽  
Magnetic Hysteresis ◽  
Large Energy ◽  
Magnetic Studies ◽  
Bridging Ligands ◽  
Single Molecule Magnet ◽  
Exchange Biasing

A dichlorido-bridged dinuclear dysprosium(III) single-molecule magnet [Dy<sub>2</sub>L<sub>2</sub>(<i>µ</i>-Cl)<sub>2</sub>(THF)<sub>2</sub>] has been made using a diamine-bis(phenolate) ligand, H<sub>2</sub>L. Magnetic studies show an energy barrier for magnetization reversal (<i>U</i><sub>eff</sub>) around 1000 K. Exchange-biasing effect is clearly seen in magnetic hysteresis with steps up to 4 K. <i>Ab</i> initio calculations exclude the possibility of pure dipolar origin of this effect leading to the conclusion that super-exchange <i>via</i> the chloride bridging ligands is important.

Correlating Blocking Temperatures in Single Molecule Magnets with Raman Relaxation

2018 ◽  
Author(s):  
Marcus J. Giansiracusa ◽  
Andreas Kostopoulos ◽  
George F. S. Whitehead ◽  
David Collison ◽  
Floriana Tuna ◽  
...  
Keyword(s):  
Relaxation Time ◽  
Single Molecule ◽  
Energy Barrier ◽  
Thermal Relaxation ◽  
Relaxation Mechanism ◽  
Blocking Temperature ◽  
Single Molecule Magnets ◽  
Single Molecule Magnet ◽  
Key Parameter

We report a six coordinate DyIII single-molecule magnet<br>(SMM) with an energy barrier of 1110 K for thermal relaxation of<br>magnetization. The sample shows no retention of magnetization<br>even at 2 K and this led us to find a good correlation between the<br>blocking temperature and the Raman relaxation regime for SMMs.<br>The key parameter is the relaxation time (𝜏<sub>switch</sub>) at the point where<br>the Raman relaxation mechanism becomes more important than<br>Orbach.

scholarly journals Solid‐State Near‐Infrared Circularly Polarized Luminescence from Chiral YbIII‐Single‐Molecule Magnet

2021 ◽  
Author(s):  
Fabrice Pointillart ◽  
Bertrand Lefeuvre ◽  
Carlo Andrea Mattei ◽  
Jessica Flores Gonzalez ◽  
Frédéric Gendron ◽  
...  
Keyword(s):  
Solid State ◽  
Single Molecule ◽  
Near Infrared ◽  
Circularly Polarized ◽  
Single Molecule Magnet ◽  
Circularly Polarized Luminescence ◽  
Polarized Luminescence

Slow magnetic relaxation in dinuclear dysprosium and holmium phenoxide bridged complexes: a Dy2 single molecule magnet with a high energy barrier

2021 ◽  
Author(s):  
Matilde Fondo ◽  
Julio Corredoira-Vázquez ◽  
Ana M. Garcia-Deibe ◽  
Jesus Sanmartin Matalobos ◽  
Silvia Gómez-Coca ◽  
...  
Keyword(s):  
Crystal Structures ◽  
Single Molecule ◽  
Energy Barrier ◽  
Magnetic Relaxation ◽  
High Energy ◽  
Single Molecule Magnet ◽  
High Energy Barrier ◽  
Slow Magnetic Relaxation

Dinuclear [M(H3L1,2,4)]2 (M = Dy, Dy2; M = Ho, Ho2) complexes were isolated from an heptadentate aminophenol ligand. The crystal structures of Dy2·2THF, and the pyridine adducts Dy2·2Py and Ho2·2Py,...

scholarly journals Correlating Axial and Equatorial Ligand Field Effects to the Single-Molecule Magnet Performances of a Family of Dysprosium Bis-Methanediide Complexes

2021 ◽  
Author(s):  
Lewis Thomas-Hargreaves ◽  
Marcus Giansiracusa ◽  
Matthew Gregson ◽  
Emanuele Zanda ◽  
Felix O'Donnell ◽  
...  
Keyword(s):  
Alkali Metal ◽  
Single Molecule ◽  
Ligand Field ◽  
Single Molecule Magnet ◽  
Field Effects ◽  
Equatorial Ligand ◽  
Metal Alkyls

Treatment of the new methanediide-methanide complex [Dy(SCS)(SCSH)(THF)] (1Dy, SCS = {C(PPh2S)2}2-) with alkali metal alkyls and auxillary ethers produces the bis-methanediide complexes [Dy(SCS)2][Dy(SCS)2(K(DME)2)2] (2Dy), [Dy(SCS)2][Na(DME)3] (3Dy) and [Dy(SCS)2][K(2,2,2-cryptand)] (4Dy). For...

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