Two 3d–4f double helical chains including [Dy2M2]n (M = NiII and CoII) cores exhibiting slow magnetic relaxation

2016 ◽  
Vol 45 (26) ◽  
pp. 10830-10835 ◽  
Author(s):  
Shixiong She ◽  
Yahong Li ◽  
Wu Li
Keyword(s):  
Magnetic Properties ◽  
Magnetic Relaxation ◽  
Heterometallic Complexes ◽  
Helical Chain ◽  
One Dimensional ◽  
Slow Magnetic Relaxation

Two new heterometallic complexes with one-dimensional ladder-like double-helical chain structures were prepared. They both exhibit interesting magnetic properties.

Two New One-Dimensional Homospin Dy(III) Compounds Showing Slow Magnetic Relaxation

2012 ◽  
Vol 65 (10) ◽  
pp. 1436 ◽  
Author(s):  
Feng Luo ◽  
Yu-Mei Song ◽  
Hai-Xiao Huang ◽  
Xiao-Zhao Tian ◽  
Gong-Ming Sun ◽  
...  
Keyword(s):  
Magnetic Relaxation ◽  
Chain Structure ◽  
Helical Chain ◽  
Pentagonal Bipyramid ◽  
Magnetic Studies ◽  
Coordination Polyhedra ◽  
One Dimensional ◽  
Nitrobenzoic Acid ◽  
Slow Magnetic Relaxation ◽  
Ferromagnetic Interactions

In this work, we present two new one-dimensional Dy(iii) compounds, namely [Dy3(L1)9]n (1, HL1 = benzoic acid) and {[Dy4(L2)14][Fe(phen)3]}n (2, HL2 = 3-nitrobenzoic acid, phen = 1,10-phenanthroline). In 1, three distinct coordination polyhedra for Dy(iii) sites including a six-coordinated DyO6 octahedron, a seven-coordinated DyO7 pentagonal bipyramid, and eight-coordinated DyO8 dodecahedron, are observed. These Dy(iii) ions are in turn bridged by L1––carboxylate to give rise to the 1D helical chain structure. Within 2, there are two crystallography-independent Dy(iii) ions that take the mono-capped trigonal bipyramidal geometry. Through L2-carboxylate bridges the Dy(iii) ions are associated together, resulting in the 1D chain structure. Direct current magnetic susceptibilities reveal ferromagnetic interactions, whilst dynamic magnetic studies via alternating current measurements disclose slow magnetic relaxation of these structures.

Two one-dimensional lanthanide compounds with pentagonal bipyramidal ErIII centers showing slow magnetic relaxation

Polyhedron ◽  
2018 ◽  
Vol 139 ◽  
pp. 289-295 ◽  
Author(s):  
Xing-Cai Huang ◽  
Shi-Chang Yan ◽  
Cheng-Long Ji ◽  
Zi-Yi Qi ◽  
Yi-Ming Guo ◽  
...  
Keyword(s):  
Magnetic Relaxation ◽  
One Dimensional ◽  
Slow Magnetic Relaxation

Multifunctional ZnII-LnIII (Ln = Tb, Dy) complexes based on the amine-phenol ligand with field-induced slow magnetic relaxation, luminescence, and proton conduction

2021 ◽  
Author(s):  
Xiao-Nuan Zhang ◽  
Jun-Jie Hu ◽  
Jia-Li Zhang ◽  
Sui-Jun Liu ◽  
Jinsheng Liao ◽  
...  
Keyword(s):  
Magnetic Relaxation ◽  
Proton Conduction ◽  
Heterometallic Complexes ◽  
Slow Magnetic Relaxation

Two new ZnII−LnIII heterometallic complexes derived from the amine-phenol ligand, namely [Zn2Ln(L)2(H2O)2](ClO4)3·3.5H2O (Ln = Dy (1) and Tb (2), H2L = 1,2-bis(3-methoxysalicylideneethylaminooxy)ethane) have been synthesized and structurally characterized. Complexes 1...

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 One-Dimensional Coordination Polymer Constructed from Hepta-Coordinate Cobalt(II) Nodes

2020 ◽  
Vol 6 (4) ◽  
pp. 45
Author(s):  
Amit Kumar Mondal ◽  
Arpan Mondal ◽  
Sanjit Konar
Keyword(s):  
Magnetic Susceptibility ◽  
Coordination Polymer ◽  
Magnetic Anisotropy ◽  
Ab Initio Calculations ◽  
Direct Current ◽  
Magnetic Relaxation ◽  
Relaxation Processes ◽  
Ac Magnetic Susceptibility ◽  
One Dimensional ◽  
Slow Magnetic Relaxation

A one-dimensional coordination polymer was synthesized employing hepta-coordinate CoII as nodes and dicyanamide as linkers. Detailed direct current (DC) and alternating current (AC) magnetic susceptibility measurements reveal the presence of field-induced slow magnetic relaxation behavior of the magnetically isolated seven-coordinate CoII center with an easy-plane magnetic anisotropy. Detailed ab initio calculations were performed to understand the magnetic relaxation processes. To our knowledge, the reported complex represents the first example of slow magnetic relaxation in a one-dimensional coordination polymer constructed from hepta-coordinate CoII nodes and dicyanamide linkers.

ChemInform Abstract: A Rare One-Dimensional Dy(III) Complex Exhibiting Slow Magnetic Relaxation

ChemInform ◽  
2013 ◽  
Vol 44 (49) ◽  
pp. no-no
Author(s):  
Bo Na ◽  
Yu-Xia Wang ◽  
Tian Han ◽  
Wei Shi ◽  
Peng Cheng
Keyword(s):  
Magnetic Relaxation ◽  
One Dimensional ◽  
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.

3D isomorphous lanthanide coordination polymers displaying magnetic refrigeration, slow magnetic relaxation and tunable proton conduction

2018 ◽  
Vol 47 (43) ◽  
pp. 15405-15415 ◽  
Author(s):  
Siba Prasad Bera ◽  
Arpan Mondal ◽  
Subhadip Roy ◽  
Bijoy Dey ◽  
Atanu Santra ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Coordination Polymers ◽  
Magnetic Relaxation ◽  
Magnetic Refrigeration ◽  
Proton Conduction ◽  
Lanthanide Coordination Polymers ◽  
Slow Magnetic Relaxation ◽  
Coordination Frameworks

Four lanthanide 3D coordination frameworks with 1D hydrophilic channels along the crystallographic c direction have been investigated for their proton conduction and magnetic properties.

scholarly journals Neodymium β-diketonate showing slow magnetic relaxation and acting as a ratiometric thermometer based on near-infrared emission

RSC Advances ◽  
2019 ◽  
Vol 9 (41) ◽  
pp. 23444-23449 ◽  
Author(s):  
Kunal Kumar ◽  
Daisuke Abe ◽  
Keiko Komori-Orisaku ◽  
Olaf Stefańczyk ◽  
Koji Nakabayashi ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Single Molecule ◽  
Magnetic Relaxation ◽  
Near Infrared ◽  
Infrared Emission ◽  
Thermally Induced ◽  
Slow Magnetic Relaxation ◽  
Near Infrared Emission

In this work, we investigated thermally-induced Nd-based one centred ratiometric thermometer which also exhibit single molecule magnetic properties.

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