Polyoxometalate-Mediated Self-Assembly of Single-Molecule Magnets: {[XW9 O34 ]2 [MnIII 4 MnII 2 O4 (H2 O)4 ]}12−

2008 ◽  
Vol 47 (30) ◽  
pp. 5609-5612 ◽  
Author(s):  
Chris Ritchie ◽  
Alan Ferguson ◽  
Hiroyuki Nojiri ◽  
Haralampos N. Miras ◽  
Yu-Fei Song ◽  
...  
Keyword(s):  
Single Molecule ◽  
Self Assembly ◽  
Single Molecule Magnets

Single-molecule magnets under dc field with an anion effect: self-assembly of pure dysprosium(iii) metallacycles

2021 ◽  
Vol 50 (1) ◽  
pp. 262-269
Author(s):  
Jianfeng Wu ◽  
Qianqian Yang ◽  
Haoyu Wang ◽  
Yan Ge ◽  
Jinkui Tang ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Single Molecule ◽  
Self Assembly ◽  
Structural Factors ◽  
Single Molecule Magnets ◽  
Anion Effect

The anion-adaptive self-assembly described here not only offers a facile approach to produce large single-molecule magnets but also provides an understanding of how structural factors affect the magnetic properties.

Subcomponent Self-Assembly of Rare-Earth Single-Molecule Magnets

2013 ◽  
Vol 52 (9) ◽  
pp. 5194-5200 ◽  
Author(s):  
Victoria E. Campbell ◽  
Régis Guillot ◽  
Eric Riviere ◽  
Pierre-Thomas Brun ◽  
Wolfgang Wernsdorfer ◽  
...  
Keyword(s):  
Rare Earth ◽  
Single Molecule ◽  
Self Assembly ◽  
Single Molecule Magnets

Magnetic properties of bulk Mn12Pivalates16 single molecule magnets and their self assembly on functionnalized gold surface

2004 ◽  
Vol 95 (11) ◽  
pp. 7345-7347 ◽  
Author(s):  
A. Nait Abdi ◽  
J. P. Bucher ◽  
P. Rabu ◽  
O. Toulemonde ◽  
M. Drillon ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Single Molecule ◽  
Self Assembly ◽  
Gold Surface ◽  
Single Molecule Magnets

Highly Ordered Surface Self-Assembly of Fe4 Single Molecule Magnets

Nano Letters ◽  
2015 ◽  
Vol 15 (7) ◽  
pp. 4546-4552 ◽  
Author(s):  
Philipp Erler ◽  
Peter Schmitt ◽  
Nicole Barth ◽  
Andreas Irmler ◽  
Samuel Bouvron ◽  
...  
Keyword(s):  
Single Molecule ◽  
Self Assembly ◽  
Single Molecule Magnets

scholarly journals Near-Infrared Emissive Cyanido-Bridged {YbFe2} Molecular Nanomagnets Sensitive to the Nitrile Solvents of Crystallization

2021 ◽  
Vol 7 (6) ◽  
pp. 79
Author(s):  
Michal Liberka ◽  
Kseniia Boidachenko ◽  
Jakub J. Zakrzewski ◽  
Mikolaj Zychowicz ◽  
Junhao Wang ◽  
...  
Keyword(s):  
Single Molecule ◽  
Self Assembly ◽  
Near Infrared ◽  
Magnetic Data ◽  
Phonon Modes ◽  
Single Molecule Magnets ◽  
Molecular Nanomagnets ◽  
Dipole Interactions ◽  
Raman Process ◽  
Slow Magnetic Relaxation

One of the pathways toward luminescent single-molecule magnets (SMMs) is realized by the self-assembly of lanthanide(3+) ions with cyanido transition metal complexes. We report a novel family of emissive SMMs, {YbIII(4-pyridone)4[FeII(phen)2(CN)2]2}(CF3SO3)3·solv (solv = 2MeCN, 1·MeCN; 2AcrCN, 1·AcrCN; 2PrCN, 1·PrCN; 2MalCN·1MeOH; 1·MalCN; MeCN = acetonitrile, AcrCN = acrylonitrile, PrCN = propionitrile, MalCN = malononitrile). They are based on paramagnetic YbIII centers coordinating diamagnetic [FeII(phen)2(CN)2] metalloligands but differ in the nitrile solvents of crystallization. They exhibit a field-induced slow magnetic relaxation dominated by a Raman process, without an Orbach relaxation as indicated by AC magnetic data and the ab initio calculations. The Raman relaxation is solvent-dependent as represented by the power “n” of the BRamanTn contribution varying from 3.07(1), to 2.61(1), 2.37(1), and 1.68(4) for 1·MeCN, 1·PrCN, 1·AcrCN, and 1·MalCN, respectively, while the BRaman parameter adopts the opposite trend. This was correlated with the variation of phonon modes schemes, including the number of available vibrational modes and their energies, dependent on the increasing complexity of the applied nitrile. 1·MeCN and 1·MalCN show the additional T-independent relaxation assignable to dipole-dipole interactions as confirmed by its suppression in 1·AcrCN and 1·PrCN revealing longer Yb–Yb distances and the disappearance in the LuIII-diluted 1·MeCN@Lu. All compounds exhibit YbIII–centered near-infrared photoluminescence sensitized by organic ligands.

scholarly journals Self-Assembly of TbPc2 Single-Molecule Magnets on Surface through Multiple Hydrogen Bonding

Small ◽  
2017 ◽  
Vol 14 (5) ◽  
pp. 1702572 ◽  
Author(s):  
Alessandro Pedrini ◽  
Lorenzo Poggini ◽  
Cristina Tudisco ◽  
Martina Torelli ◽  
Antonino E. Giuffrida ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Single Molecule ◽  
Self Assembly ◽  
Single Molecule Magnets ◽  
Multiple Hydrogen Bonding

Polyoxometalate-Mediated Self-Assembly of Single-Molecule Magnets: {[XW9 O34 ]2 [MnIII 4 MnII 2 O4 (H2 O)4 ]}12−

2008 ◽  
Vol 120 (30) ◽  
pp. 5691-5694 ◽  
Author(s):  
Chris Ritchie ◽  
Alan Ferguson ◽  
Hiroyuki Nojiri ◽  
Haralampos N. Miras ◽  
Yu-Fei Song ◽  
...  
Keyword(s):  
Single Molecule ◽  
Self Assembly ◽  
Single Molecule Magnets

Seeking Magneto-Structural Correlations in Easily Tailored Pentagonal Bipyramid Dy(III) Single-Ion Magnets

2019 ◽  
Author(s):  
Guo-Zhang Huang ◽  
Ze-Yu Ruan ◽  
Jie-Yu Zheng ◽  
Yan-Cong Chen ◽  
Si-Guo Wu ◽  
...  
Keyword(s):  
Single Molecule ◽  
Structural Engineering ◽  
Magnetic Hysteresis ◽  
Sweep Rate ◽  
Coordination Bond ◽  
Pentagonal Bipyramid ◽  
Single Molecule Magnets ◽  
Crystal Field Theory ◽  
Bond Angles ◽  
Axial Coordination

<p><a></a>Controlling molecular magnetic anisotropy via structural engineering is delicate and fascinating, especially for single-molecule magnets (SMMs). Herein a family of dysprosium single-ion magnets (SIMs) sitting in pentagonal bipyramid geometry have been synthesized with the variable-size terminal ligands and counter anions, through which the subtle coordination geometry of Dy(III) can be finely tuned based on the size effect. The effective energy barrier (Ueff) successfully increases from 439 K to 632 K and the magnetic hysteresis temperature (under a 200 Oe/s sweep rate) raises from 11 K to 24 K. Based on the crystal-field theory, a semi-quantitative magneto-structural correlation deducing experimentally for the first time is revealed that the Ueff is linearly proportional to the structural-related value S2<sup>0</sup> corresponding to the axial coordination bond lengths and the bond angles. Through the evaluation of the remanent magnetization from hysteresis, quantum tunneling of magnetization (QTM) is found to exhibit negative correlation with the structural-related value S<sub>tun</sub> corresponding to the axial coordination bond angles.<br></p>

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.

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