Combination of single-molecule magnet behaviour and luminescence properties in a new series of lanthanide complexes with tris(pyrazolyl)borate and oligo(β-diketonate) ligands

2020 ◽  
Vol 49 (23) ◽  
pp. 7774-7789 ◽  
Author(s):  
Elena A. Mikhalyova ◽  
Matthias Zeller ◽  
Jerry P. Jasinski ◽  
Raymond J. Butcher ◽  
Luca M. Carrella ◽  
...  
Keyword(s):  
Single Molecule ◽  
Lanthanide Complexes ◽  
Ternary Complexes ◽  
Luminescence Properties ◽  
Quantum Yields ◽  
Single Molecule Magnets ◽  
Single Molecule Magnet

Mono-, di- & trinuclear ternary complexes of Dy3+ & Tb3+ with pyrazole & oligo-diketonates are both luminescent and single molecule magnets. Quantum yields & Ueff values decrease with higher nuclearity & reduced intramolecular Ln–Ln distance.

Luminescence, magnetocaloric effect and single-molecule magnet behavior in lanthanide complexes based on a tridentate ligand derived from 8-hydroxyquinoline

2015 ◽  
Vol 44 (43) ◽  
pp. 18893-18901 ◽  
Author(s):  
Hai-Yun Shen ◽  
Wen-Min Wang ◽  
Yan-Xia Bi ◽  
Hong-Ling Gao ◽  
Shuang Liu ◽  
...  
Keyword(s):  
Magnetocaloric Effect ◽  
Single Molecule ◽  
Lanthanide Complexes ◽  
Luminescence Properties ◽  
Tridentate Ligand ◽  
Single Molecule Magnet

New lanthanide complexes based on a tridentate ligand derived from 8-hydroxyquinoline were synthesized. Luminescence properties and single-molecule magnet behavior were investigated.

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.

Recent advances in lanthanide coordination polymers and clusters with magnetocaloric effect or single-molecule magnet behavior

2021 ◽  
Author(s):  
Jun-Jie Hu ◽  
Yan Peng ◽  
Sui-Jun Liu ◽  
He-Rui Wen
Keyword(s):  
Quantum Computing ◽  
Low Temperature ◽  
Magnetocaloric Effect ◽  
Coordination Polymers ◽  
Single Molecule ◽  
Information Storage ◽  
Lanthanide Ions ◽  
Single Molecule Magnets ◽  
Single Molecule Magnet ◽  
Lanthanide Coordination Polymers

The molecular magnetorefrigerant materials for low-temperature magnetic refrigeration and single-molecule magnets for high-density information storage and quantum computing have received extensive attention from chemists and magnetic experts. Lanthanide ions with...

A series of dinuclear lanthanide complexes derived from a hydroxyl-rich ligand: {Dy2} exhibiting single-molecule magnet behaviour

Polyhedron ◽  
2019 ◽  
Vol 159 ◽  
pp. 64-71 ◽  
Author(s):  
Yu Ge ◽  
Yanfeng Cui ◽  
Yuan Huang ◽  
Guoqing Wang ◽  
Wei Liu ◽  
...  
Keyword(s):  
Single Molecule ◽  
Lanthanide Complexes ◽  
Single Molecule Magnet

Polyoxometalate-Supported Lanthanoid Single-Molecule Magnets

2014 ◽  
Vol 67 (11) ◽  
pp. 1542 ◽  
Author(s):  
Michele Vonci ◽  
Colette Boskovic
Keyword(s):  
Single Molecule ◽  
Energy Barrier ◽  
Magnetic Relaxation ◽  
Donor Ligands ◽  
Single Molecule Magnets ◽  
Single Molecule Magnet ◽  
Coordination Numbers ◽  
Oxygen Donor ◽  
Slow Magnetic Relaxation

Polyoxometalates are robust and versatile multidentate oxygen-donor ligands, eminently suitable for coordination to trivalent lanthanoid ions. To date, 10 very different structural families of such complexes have been found to exhibit slow magnetic relaxation due to single-molecule magnet (SMM) behaviour associated with the lanthanoid ions. These families encompass complexes with between one and four of the later lanthanoid ions: Tb, Dy, Ho, Er, and Yb. The lanthanoid coordination numbers vary between six and eleven and a range of coordination geometries are evident. The highest energy barrier to magnetisation reversal measured to date for a lanthanoid–polyoxometalate SMM is Ueff/kB = 73 K for the heterodinuclear Dy–Eu compound (Bu4N)8H4[DyEu(OH)2(γ-SiW10O36)2].

A new family of dinuclear lanthanide complexes exhibiting luminescence, magnetic entropy changes and single molecule magnet behaviors

CrystEngComm ◽  
2021 ◽  
Author(s):  
Lu Dong ◽  
Ying-Bing Lu ◽  
Shui-Dong Zhu ◽  
Jun-Wei Wu ◽  
Xin-Ting Zhang ◽  
...  
Keyword(s):  
Magnetocaloric Effect ◽  
Single Molecule ◽  
Lanthanide Complexes ◽  
Magnetic Entropy ◽  
Single Molecule Magnet ◽  
Entropy Changes ◽  
New Family

Four isomorphic and dinuclear lanthanide complexes were synthesized. Complexes EuIII and TbIII exhibit strong emissions, while GdIII shows the magnetocaloric effect and DyIII displays a single-molecule magnet.

scholarly journals Single-molecule magnet properties of a monometallic dysprosium pentalene complex

2018 ◽  
Vol 54 (51) ◽  
pp. 7085-7088 ◽  
Author(s):  
Alexander F. R. Kilpatrick ◽  
Fu-Sheng Guo ◽  
Benjamin M. Day ◽  
Akseli Mansikkamäki ◽  
Richard A. Layfield ◽  
...  
Keyword(s):  
Single Molecule ◽  
Energy Barriers ◽  
Single Molecule Magnets ◽  
Single Molecule Magnet ◽  
Dysprosium Complex

The pentalene-ligated dysprosium complex [(η8-Pn†)Dy(Cp*)] (1Dy) (Pn† = [1,4-(iPr3Si)2C8H4]2−) and its magnetically dilute analogue are single-molecule magnets, with energy barriers of 245 cm−1.

scholarly journals Fulvalene as a platform for the synthesis of a dimetallic dysprosocenium single-molecule magnet

2020 ◽  
Vol 11 (22) ◽  
pp. 5745-5752 ◽  
Author(s):  
Mian He ◽  
Fu-Sheng Guo ◽  
Jinkui Tang ◽  
Akseli Mansikkamäki ◽  
Richard A. Layfield
Keyword(s):  
Single Molecule ◽  
Single Molecule Magnets ◽  
Single Molecule Magnet

A series of fulvalene-supported dimetallic dysprosium metallocene SMMs provides a roadmap to poly-cationic dysprosocenium single-molecule magnets.

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