Synthesis and Magnetic Properties of a New Family of Macrocyclic MII3LnIII Complexes: Insights into the Effect of Subtle Chemical Modification on Single-Molecule Magnet Behavior

2012 ◽  
Vol 51 (20) ◽  
pp. 10603-10612 ◽  
Author(s):  
Humphrey L. C. Feltham ◽  
Rodolphe Clérac ◽  
Liviu Ungur ◽  
Veacheslav Vieru ◽  
Liviu F. Chibotaru ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Chemical Modification ◽  
Single Molecule ◽  
Single Molecule Magnet ◽  
New Family

A new family of hetero-tri-metallic complexes [M(CuTb)]n (n = 1, 2, ∞; M = Co, Cr, Fe): synthesis, structure and tailored single-molecule magnet behavior

2015 ◽  
Vol 44 (11) ◽  
pp. 5170-5178 ◽  
Author(s):  
N. Bridonneau ◽  
G. Gontard ◽  
V. Marvaud
Keyword(s):  
Magnetic Properties ◽  
Single Molecule ◽  
Structural Characterization ◽  
Single Molecule Magnet ◽  
New Family

The synthesis, structural characterization and magnetic properties of a new family of hetero-tri-metallic complexes [M(CuTb)]n (n = 1, 2, ∞; M = Co, Cr, Fe), exhibiting single molecule magnet behaviour have been reported.

scholarly journals A Dy(III) Fluorescent Single-Molecule Magnet Based on a Rhodamine 6G Ligand

Inorganics ◽  
2021 ◽  
Vol 9 (7) ◽  
pp. 51
Author(s):  
Lin Miao ◽  
Mei-Jiao Liu ◽  
Man-Man Ding ◽  
Yi-Quan Zhang ◽  
Hui-Zhong Kou
Keyword(s):  
Magnetic Properties ◽  
Single Molecule ◽  
Magnetic Relaxation ◽  
Rhodamine 6G ◽  
Bond Angle ◽  
Magnetic Measurements ◽  
Single Molecule Magnet ◽  
Lanthanide Metals ◽  
Process Studies ◽  
Dual Functions

The complexes of lanthanide metals, especially dysprosium, can generally exhibit excellent magnetic properties. By means of modifying ligands, dual functions or even multi-functions can be achieved. Here, we synthesized an eight-coordinate Dy(III) complex 1, [Dy(HL-o)2(MeOH)2](ClO4)3·4.5MeOH, which is single-molecule magnet (SMM), and the introduction of the rhodamine 6G chromophore in the ring-opened ligand HL-o realizes ligand-centered fluorescence in addition to SMM. Magnetic measurements and ab initio calculations indicate that the magnetic relaxation for complex 1 should be due to the Raman relaxation process. Studies on magneto-structural correlationship of the rhodamine salicylaldehyde hydrazone Dy(III) complexes show that the calculated energy of the first Kramers Doublet (EKD1) is basically related to the Ophenoxy-Dy-Ophenoxy bond angle, i.e., the larger Ophenoxy-Dy-Ophenoxy bond angle corresponds to a larger EKD1.

Multifunctional properties of {CuII2LnIII2} systems involving nitrogen-rich nitronyl nitroxide: single-molecule magnet behavior, luminescence, magnetocaloric effects and heat capacity

2021 ◽  
Author(s):  
Hongdao Li ◽  
Pei Jing ◽  
Jiao Lu ◽  
Lu Xi ◽  
Qi Wang ◽  
...  
Keyword(s):  
Heat Capacity ◽  
Magnetic Properties ◽  
Single Molecule ◽  
Nitroxide Radical ◽  
Nitronyl Nitroxide ◽  
Nitronyl Nitroxide Radical ◽  
Single Molecule Magnet ◽  
Luminescence Behavior ◽  
Multifunctional Properties

A family of 3d–4f heterometallic ring-shaped clusters on the basis of a nitrogen-rich nitronyl nitroxide radical have been obtained, and they feature polyfunctionality including magnetic properties, thermodynamics and luminescence behavior.

Synthesis, structure and magnetic properties of a decametallic Ni single-molecule magnet

2005 ◽  
pp. 5038 ◽  
Author(s):  
Guillem Aromí ◽  
Simon Parsons ◽  
Wolfgang Wernsdorfer ◽  
Euan K. Brechin ◽  
Eric J. L. McInnes
Keyword(s):  
Magnetic Properties ◽  
Single Molecule ◽  
Single Molecule Magnet

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.

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 Influence of the supramolecular architecture on the magnetic properties of a DyIII single-molecule magnet: an ab initio investigation

2014 ◽  
Vol 5 ◽  
pp. 2267-2274 ◽  
Author(s):  
Julie Jung ◽  
Olivier Cador ◽  
Kevin Bernot ◽  
Fabrice Pointillart ◽  
Javier Luzon ◽  
...  
Keyword(s):  
Hydrogen Bond ◽  
Magnetic Properties ◽  
Single Molecule ◽  
Ground State ◽  
Supramolecular Interactions ◽  
Supramolecular Organization ◽  
Supramolecular Architecture ◽  
Magnetic Ground State ◽  
Single Molecule Magnet ◽  
Hydrogen Bond Networks

Single-crystal angular-resolved magnetometry and wavefunction-based calculations have been used to reconsider the magnetic properties of a recently reported DyIII-based single-molecule magnet, namely [Dy(hfac)3(L1)] with hfac− = 1,1,1,5,5,5-hexafluoroacetylacetonate and L1 = 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 DyIII 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.

An air stable radical-bridged dysprosium single molecule magnet and its neutral counterpart: redox switching of magnetic relaxation dynamics

2017 ◽  
Vol 53 (14) ◽  
pp. 2283-2286 ◽  
Author(s):  
Brian S. Dolinar ◽  
Silvia Gómez-Coca ◽  
Dimitris I. Alexandropoulos ◽  
Kim R. Dunbar
Keyword(s):  
Magnetic Properties ◽  
Single Molecule ◽  
Quantum Tunneling ◽  
Magnetic Relaxation ◽  
Thermal Relaxation ◽  
Relaxation Dynamics ◽  
Single Molecule Magnet ◽  
Neutral Compound ◽  
Redox Switching ◽  
P Addition

Addition of a radical to the bridging tetrazine ligand of a Dy2 complex dramatically alters the magnetic properties. The radical complex undergoes magnetic relaxation via a thermal relaxation pathway, whereas the neutral compound relaxes via quantum tunneling of the magnetization.

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