Slow magnetic relaxation in cobalt N-heterocyclic carbene complexes

2020 ◽  
Vol 49 (33) ◽  
pp. 11577-11582
Author(s):  
Mohamed R. Saber ◽  
Jacob A. Przyojski ◽  
Zachary J. Tonzetich ◽  
Kim R. Dunbar
Keyword(s):  
Magnetic Properties ◽  
Theoretical Investigation ◽  
Magnetic Relaxation ◽  
Easy Axis ◽  
Easy Plane ◽  
Carbene Complexes ◽  
Plane Anisotropy ◽  
Slow Magnetic Relaxation

The combined experimental and theoretical investigation of the magnetic properties of [Co(CH2SiMe3)2(IPr)] (1), [CoCl2(IMes)2] (2) revealed a large easy plane anisotropy for 1 and a moderate easy axis anisotropy for 2.

Syntheses, crystal structures and magnetic properties of two mixed-valence Co(iii)Co(ii) compounds derived from Schiff base ligands: field-supported single-ion-magnet behavior with easy-plane anisotropy

2017 ◽  
Vol 46 (38) ◽  
pp. 13135-13144 ◽  
Author(s):  
Shuvankar Mandal ◽  
Suraj Mondal ◽  
Cyril Rajnák ◽  
Ján Titiš ◽  
Roman Boča ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Schiff Base ◽  
Crystal Structures ◽  
Magnetic Relaxation ◽  
Mixed Valence ◽  
Easy Plane ◽  
Schiff Base Ligands ◽  
Plane Anisotropy ◽  
Amino Phenol ◽  
Slow Magnetic Relaxation

Positive D values and slow magnetic relaxation with two relaxation channels have been observed in two CoIIICoII compounds derived from imino-amino-phenol ligands.

Slow Magnetic Relaxation in Weak Easy-Plane Anisotropy: the Case of a Combined Magnetic and HFEPR Study

2016 ◽  
Vol 56 (2) ◽  
pp. 697-700 ◽  
Author(s):  
Yuan-Yuan Zhu ◽  
Fang Liu ◽  
Jia-Jia Liu ◽  
Yin-Shan Meng ◽  
Shang-Da Jiang ◽  
...  
Keyword(s):  
Magnetic Relaxation ◽  
Easy Plane ◽  
Plane Anisotropy ◽  
Slow Magnetic Relaxation

Field-Supported Slow Magnetic Relaxation in Hexacoordinate CoIIComplexes with Easy Plane Anisotropy

2017 ◽  
Vol 2017 (11) ◽  
pp. 1520-1525 ◽  
Author(s):  
Cyril Rajnák ◽  
Ján Titiš ◽  
Ján Moncoľ ◽  
Franz Renz ◽  
Roman Boča
Keyword(s):  
Magnetic Relaxation ◽  
Easy Plane ◽  
Plane Anisotropy ◽  
Slow Magnetic Relaxation

Slow magnetic relaxation in a pseudotetrahedral cobalt(ii) complex with easy-plane anisotropy

2012 ◽  
Vol 48 (33) ◽  
pp. 3927 ◽  
Author(s):  
Joseph M. Zadrozny ◽  
Junjie Liu ◽  
Nicholas A. Piro ◽  
Christopher J. Chang ◽  
Stephen Hill ◽  
...  
Keyword(s):  
Magnetic Relaxation ◽  
Easy Plane ◽  
Plane Anisotropy ◽  
Slow Magnetic Relaxation

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 Nitronyl Nitroxide Biradical-Based Binuclear Lanthanide Complexes: Structure and Magnetic Properties

2020 ◽  
Vol 6 (4) ◽  
pp. 48
Author(s):  
Lu Xi ◽  
Jing Han ◽  
Xiaohui Huang ◽  
Licun Li
Keyword(s):  
Magnetic Properties ◽  
Magnetic Relaxation ◽  
Lanthanide Complexes ◽  
Magnetic Data ◽  
Antiferromagnetic Coupling ◽  
Zero Field ◽  
Nitronyl Nitroxide ◽  
Ferromagnetic Exchange ◽  
Binuclear Structure ◽  
Slow Magnetic Relaxation

Employing a new nitronyl nitroxide biradical NITPhPzbis(NITPhPzbis = 5-(1-pyrazolyl)-1,3-bis(1’-oxyl-3’-oxido-4’,4’,5’,5’-tetramethyl-4,5-hydro-1H-imidazol-2-yl)benzene), a series of 2p-4f complexes [Ln2(hfac)6(H2O)(NITPhPzbis)] (LnIII = Gd1, Tb2, Dy3; hfac = hexafluoroacetylacetonate) were successfully synthesized. In complexes 1–3, the designed biradical NITPhPzbis coordinates with two LnIII ions in chelating and bridging modes to form a four-spin binuclear structure. Direct-current magnetic study of Gd analogue indicates that ferromagnetic exchange exists between the Gd ion and the radical while antiferromagnetic coupling dominates between two mono-radicals. Dynamic magnetic data show that the χ” signals of complex 3 exhibit frequency dependence under zero field, demonstrating slow magnetic relaxation behavior in complex 3. And the estimated values of Ueff and τ0 are about 8.4 K and 9.1 × 10−8 s, respectively.

scholarly journals Slow magnetic relaxation in a {CoIICoIII2} complex containing a high magnetic anisotropy trigonal bipyramidal CoII centre

2018 ◽  
Vol 47 (28) ◽  
pp. 9237-9240 ◽  
Author(s):  
Alexandra Collet ◽  
Gavin A. Craig ◽  
María José Heras Ojea ◽  
Lakshmi Bhaskaran ◽  
Claire Wilson ◽  
...  
Keyword(s):  
Magnetic Anisotropy ◽  
Magnetic Relaxation ◽  
Easy Plane ◽  
Trigonal Bipyramidal ◽  
Slow Magnetic Relaxation

Incorporation of a trigonal bipyramidal CoII centre in {CoIICoIII2} leads to a large, easy-plane magnetic anisotropy and slow magnetic relaxation.

Syntheses and magnetic properties of a bis-tridentate nitronyl nitroxide radical and its metal complexes

2019 ◽  
Vol 48 (15) ◽  
pp. 4774-4778 ◽  
Author(s):  
Hao Miao ◽  
Miao Li ◽  
Hong-Qing Li ◽  
Fu-Xing Shen ◽  
Yi-Quan Zhang ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Metal Complexes ◽  
Magnetic Relaxation ◽  
Nitroxide Radical ◽  
Nitronyl Nitroxide ◽  
Nitronyl Nitroxide Radical ◽  
Slow Magnetic Relaxation

A new bis-tridentate nitronyl nitroxide radical was synthesized and characterized. Field-induced slow magnetic relaxation was observed in the radical-bridged CoII complex.

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