Single-molecule magnet involving strong exchange coupling in terbium(iii) complex with 2,2′-bipyridin-6-yl tert-butyl nitroxide

2015 ◽  
Vol 2 (9) ◽  
pp. 860-866 ◽  
Author(s):  
Takuya Kanetomo ◽  
Shunsuke Yoshii ◽  
Hiroyuki Nojiri ◽  
Takayuki Ishida
Keyword(s):  
Magnetic Properties ◽  
Hysteresis Loop ◽  
Single Molecule ◽  
Exchange Coupling ◽  
Antiferromagnetic Interaction ◽  
Single Molecule Magnet ◽  
Tert Butyl ◽  
Strong Exchange

Intramolecular antiferromagnetic interaction in Tb-6bpyNO was confirmed by comparison with the magnetic properties of Tb-6bpyCO and Y-6bpyNO. Tb-6bpyNO showed a hysteresis loop below 1.6 K, but Tb-6bpyCO did not behave as a single-molecule magnet.

scholarly journals Redox Modulation of Field-Induced Tetrathiafulvalene-Based Single-Molecule Magnets of Dysprosium

2020 ◽  
Vol 6 (3) ◽  
pp. 34
Author(s):  
Siham Tiaouinine ◽  
Jessica Flores Gonzalez ◽  
Vincent Montigaud ◽  
Carlo Andrea Mattei ◽  
Vincent Dorcet ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Single Molecule ◽  
Chemical Oxidation ◽  
Dinuclear Complexes ◽  
Computational Results ◽  
Single Molecule Magnets ◽  
Redox Modulation ◽  
Single Molecule Magnet ◽  
Tert Butyl ◽  
Coordination Reaction

The complexes [Dy2(tta)6(H2SQ)] (Dy-H2SQ) and [Dy2(tta)6(Q)]·2CH2Cl2 (Dy-Q) (tta− = 2-thenoyltrifluoroacetonate) were obtained from the coordination reaction of the Dy(tta)3·2H2O units with the 2,2′-benzene-1,4-diylbis(6-hydroxy-4,7-di-tert-butyl-1,3-benzodithiol-2-ylium-5-olate ligand (H2SQ) and its oxidized form 2,2′-cyclohexa-2,5-diene-1,4-diylidenebis(4,7-di-tert-butyl-1,3-benzodithiole-5,6-dione (Q). The chemical oxidation of H2SQ in Q induced an increase in the coordination number from 7 to 8 around the DyIII ions and by consequence a modulation of the field-induced Single-Molecule Magnet behavior. Computational results rationalized the magnetic properties of each of the dinuclear complexes.

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.

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.

A mononuclear five-coordinate Co(ii) single molecule magnet with a spin crossover between the S = 1/2 and 3/2 states

2018 ◽  
Vol 47 (46) ◽  
pp. 16596-16602 ◽  
Author(s):  
Lei Chen ◽  
Jingbo Song ◽  
Wen Zhao ◽  
Gangji Yi ◽  
Zhikuan Zhou ◽  
...  
Keyword(s):  
Hysteresis Loop ◽  
Single Molecule ◽  
Magnetic Relaxation ◽  
Spin Crossover ◽  
Spin Transition ◽  
Single Molecule Magnet ◽  
Pyramidal Geometry ◽  
Mononuclear Cobalt ◽  
Slow Magnetic Relaxation ◽  
Square Pyramidal Geometry

A mononuclear cobalt(ii) complex with square pyramidal geometry displays a spin transition with a small hysteresis loop and slow magnetic relaxation.

scholarly journals Strong Exchange Couplings Drastically Slow Down Magnetization Relaxation in an Air‐Stable Cobalt(II)‐Radical Single‐Molecule Magnet (SMM)

2019 ◽  
Vol 58 (29) ◽  
pp. 9802-9806 ◽  
Author(s):  
Uta Albold ◽  
Heiko Bamberger ◽  
Philipp P. Hallmen ◽  
Joris van Slageren ◽  
Biprajit Sarkar
Keyword(s):  
Single Molecule ◽  
Magnetization Relaxation ◽  
Single Molecule Magnet ◽  
Strong Exchange
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