scholarly journals Dodecanuclear 3d/4f-metal clusters with a ‘Star of David’ topology: single-molecule magnetism and magnetocaloric properties

2016 ◽  
Vol 52 (8) ◽  
pp. 1693-1696 ◽  
Author(s):  
Dimitris I. Alexandropoulos ◽  
Luís Cunha-Silva ◽  
Giulia Lorusso ◽  
Marco Evangelisti ◽  
Jinkui Tang ◽  
...  
Keyword(s):  
Metal Ions ◽  
Single Molecule ◽  
Metal Clusters ◽  
Magnetic Refrigeration ◽  
Magnetocaloric Properties

The first dodecanuclear [MII6LnIII6] clusters with a ‘Star of David’ metal topology have been synthesized with a variety of different divalent 3d-metal ions and lanthanides, and exhibited single-molecule magnetism and magnetic refrigeration.

ChemInform Abstract: Dodecanuclear 3d/4f-Metal Clusters with a ′Star of David′ Topology: Single-Molecule Magnetism and Magnetocaloric Properties.

ChemInform ◽  
2016 ◽  
Vol 47 (14) ◽  
Author(s):  
Dimitris I. Alexandropoulos ◽  
Luis Cunha-Silva ◽  
Giulia Lorusso ◽  
Marco Evangelisti ◽  
Jinkui Tang ◽  
...  
Keyword(s):  
Single Molecule ◽  
Metal Clusters ◽  
Magnetocaloric Properties

Regulation of magnetic relaxation behavior by replacing 3d transition metal ions in [M2Dy2] complexes containing two different organic chelating ligands

2019 ◽  
Vol 48 (27) ◽  
pp. 10011-10022 ◽  
Author(s):  
Hui-Sheng Wang ◽  
Cheng-Ling Yin ◽  
Zhao-Bo Hu ◽  
Yong Chen ◽  
Zhi-Quan Pan ◽  
...  
Keyword(s):  
Transition Metal ◽  
Metal Ions ◽  
Single Molecule ◽  
Magnetic Relaxation ◽  
Transition Metal Ions ◽  
Relaxation Behavior ◽  
Organic Ligands ◽  
Chelating Ligands ◽  
Single Molecule Magnet

Two [MIII2DyIII2] complexes (M = Fe for 1 and Co for 2) with mixed organic ligands were obtained. Complex 2 exhibits single molecule magnet behavior with Ueff = 64.0(9) K.

Structures, fluorescence properties and magnetic properties of a series of rhombus-shaped LnIII4 clusters: magnetocaloric effect and single-molecule-magnet behavior

2019 ◽  
Vol 43 (33) ◽  
pp. 12941-12949 ◽  
Author(s):  
Wen-Min Wang ◽  
Li Zhang ◽  
Xian-Zhen Li ◽  
Li-Yuan He ◽  
Xin-Xin Wang ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Magnetocaloric Effect ◽  
Single Molecule ◽  
Magnetic Relaxation ◽  
Magnetic Refrigeration ◽  
Fluorescence Properties ◽  
Relaxation Processes ◽  
Magnetic Studies ◽  
Single Molecule Magnet ◽  
Slow Magnetic Relaxation

A family LnIII4 clusters were successfully synthesized and structurally characterized. Magnetic studies show that Gd4 cluster displays magnetic refrigeration, while Dy4 cluster demonstrates two distinct slow magnetic relaxation processes.

scholarly journals Rare “Janus”-faced single-molecule magnet exhibiting intramolecular ferromagnetic interactions

2019 ◽  
Vol 10 (6) ◽  
pp. 1626-1633 ◽  
Author(s):  
Dimitris I. Alexandropoulos ◽  
Kuduva R. Vignesh ◽  
Theocharis C. Stamatatos ◽  
Kim R. Dunbar
Keyword(s):  
Metal Ions ◽  
Single Molecule ◽  
Metal Cluster ◽  
Single Molecule Magnet ◽  
Ferromagnetic Interactions

The unusual ferromagnetically coupled compound was prepared by the use of Me3SiN3 with the metal ions being exclusively bridged by end-on N3−. Th cationic molecule is a rare example of a 3d-metal cluster exhibiting a “Janus”-faced SMM behavior for the dried and wet forms.

Heterometallic 3d–4f single molecule magnets containing diamagnetic metal ions

2018 ◽  
Vol 47 (27) ◽  
pp. 8841-8864 ◽  
Author(s):  
Amit Chakraborty ◽  
Joydeb Goura ◽  
Pankaj Kalita ◽  
Abinash Swain ◽  
Gopalan Rajaraman ◽  
...  
Keyword(s):  
Metal Ions ◽  
Single Molecule ◽  
Single Molecule Magnets

This perspective deals with the synthesis and study of SMM properties of heterometallic 3d–4f complexes containing diamagnetic 3d metal ions.

Filling the gap between the quantum and classical worlds of nanoscale magnetism: giant molecular aggregates based on paramagnetic 3d metal ions

2016 ◽  
Vol 45 (6) ◽  
pp. 1597-1628 ◽  
Author(s):  
Constantina Papatriantafyllopoulou ◽  
Eleni E. Moushi ◽  
George Christou ◽  
Anastasios J. Tasiopoulos
Keyword(s):  
Magnetic Properties ◽  
Magnetic Nanoparticles ◽  
Metal Ions ◽  
Crystal Structures ◽  
Magnetic Materials ◽  
Metal Clusters ◽  
Molecular Aggregates ◽  
Bottom Up ◽  
Paramagnetic Metal

The syntheses, structures and magnetic properties of giant molecular 3d and 3d/4f paramagnetic metal clusters are surveyed. Such complexes combine fascinating crystal structures, interesting magnetic properties and sizes comparable to those of classical magnetic nanoparticles providing a powerful bottom-up approach to nanoscale magnetic materials.

Magnetocaloric Properties Desired for Magnetic Refrigeration System near Room Temperature

2011 ◽  
Vol 1310 ◽  
Author(s):  
H. Wada
Keyword(s):  
Room Temperature ◽  
Composite Layer ◽  
Cooling Capacity ◽  
Magnetic Refrigeration ◽  
Experimental Results ◽  
Refrigeration System ◽  
Layer Material ◽  
Magnetic Refrigerant ◽  
Magnetocaloric Properties

ABSTRACTIn order to realize the magnetic refrigeration system, it is necessary to develop a 100 W class refrigerator with COP > 7.5. This requires us to find new magnetic refrigerant materials, of which cooling capacity is 2.5 times higher than that of Gd. In this paper, first we discuss the cooling capacity of magnetic refrigerant materials to achieve COP = 7.5. Then, we compare the experimental results of MnAsSb, MnFe(PGe) and La(FeCoSi)13 compounds with the calculated cooling capacity. It is suggested that a composite layer material of MnFe(PGe) would show excellent cooling capacity in the temperature span of 20 K.

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