Single-Molecule Magnetic Behavior in a Calix[8]arene-Capped Heterometallic {DyIII 4 CoII 4 } Square-Antiprismatic Cluster

2017 ◽  
Vol 2017 (41) ◽  
pp. 4879-4883 ◽  
Author(s):  
Haitao Han ◽  
Xiao-Lei Li ◽  
Xiaofei Zhu ◽  
Guoshuai Zhang ◽  
Xinxin Hang ◽  
...  
Keyword(s):  
Single Molecule ◽  
Magnetic Behavior

Inducing Single Molecule Magnetic Behavior in a [Co4O4] Cubane via a Pronounced Solvatomagnetic Effect

2014 ◽  
Vol 53 (6) ◽  
pp. 2976-2982 ◽  
Author(s):  
Felix J. Klinke ◽  
Animesh Das ◽  
Serhiy Demeshko ◽  
Sebastian Dechert ◽  
Franc Meyer
Keyword(s):  
Single Molecule ◽  
Magnetic Behavior

Synthesis, structures and magnetism of a series of dinuclear and one-dimensional Ni–Ln complexes: single-molecule magnetic behavior in one-dimensional nitrate-bridged Dy analogue

2015 ◽  
Vol 39 (11) ◽  
pp. 8356-8363 ◽  
Author(s):  
Min-Xia Yao ◽  
Xing-Yun Lu ◽  
Zhao-Xia Zhu ◽  
Xiao-Wei Deng ◽  
Su Jing
Keyword(s):  
Single Molecule ◽  
Magnetic Behavior ◽  
One Dimensional

By using a salen-type ligand and changing the reaction solvent, a series of NiII–LnIII complexes have been obtained and structurally and magnetically characterized.

scholarly journals Two Tetranuclear Butterfly-Shaped Co(II) Complexes: Structure, Mass Spectrometric, and Magnetism

Crystals ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 477
Author(s):  
Qian-Jun Deng ◽  
Min Chen ◽  
Dong-Chu Chen ◽  
Chang-Ai Chen
Keyword(s):  
Single Molecule ◽  
Organic Ligand ◽  
Magnetic Behavior ◽  
Molecular Fragment ◽  
Ionization Mass ◽  
Current Field ◽  
Magnetic Characterization ◽  
Nuclear Fragment ◽  
Fragment Peak ◽  
Solvothermal Conditions

The organic ligand (1-methyl-1H-benzo[d]imidazol-2-yl)methanol (HL) was used to react with CoX2·6H2O (X = Cl and Br) under solvothermal conditions to obtain the complex [Co4(L)6(X)2] (1, X = Cl; 2, X = Br). The butterfly-shaped structure of complex 1 and 2 suggest that Co(II) ions have two different coordinated modes, which are five coordination with O3NX environment and six coordination with O4N2 environment. In addition, the electrospray ionization mass spectrometry (ESI-MS) analysis indicated that the ion molecular fragment of highest intensity was [Co4(L)6]2+, and there existed a high nuclear fragment peak of [Co7(L)12]2+. Interestingly, it was basically completely transformed into [Co7(L)12]2+ two days later, so those two complexes were relatively stable in CH3OH. Magnetic characterization exhibited that complex 1 and 2 display field-induced single-molecule magnetic behavior, of which the energy hills Ueff/kB were 28 and 20 K under direct-current field of 0.1 T, respectively.

scholarly journals TwoC3-Symmetric Dy3IIIComplexes with Triple Di-μ-methoxo-μ-phenoxo Bridges, Magnetic Ground State, and Single-Molecule Magnetic Behavior

2014 ◽  
Vol 20 (27) ◽  
pp. 8410-8420 ◽  
Author(s):  
Mikko M. Hänninen ◽  
Antonio J. Mota ◽  
Daniel Aravena ◽  
Eliseo Ruiz ◽  
Reijo Sillanpää ◽  
...  
Keyword(s):  
Single Molecule ◽  
Ground State ◽  
Magnetic Behavior ◽  
Magnetic Ground State

scholarly journals Lanthanide Complexes with a Tripodal Nitroxyl Radical Showing Strong Magnetic Coupling

2020 ◽  
Author(s):  
Mauro Perfetti ◽  
Andrea Caneschi ◽  
Taisiya S. Sukhikh ◽  
Kira E. Vostrikova
Keyword(s):  
Single Molecule ◽  
Nitroxyl Radical ◽  
Magnetic Coupling ◽  
Magnetic Behavior ◽  
Nitroxyl Radicals ◽  
Antiferromagnetic Coupling ◽  
Zero Field ◽  
Effective Barrier ◽  
Mononuclear Complexes ◽  
Tricapped Trigonal Prism

A series of isomorphous mononuclear complexes of Ln(III) ions comprising one stable tripoidal oxazolidine nitroxyl radical were obtained in acetonitrile media starting from nitrates. The compounds, [LnRad(NO<sub>3</sub>)<sub>3</sub>] (Ln = Gd, Tb, Dy, Tm, Y; Rad = 4,4-dimethyl-2,2-bis(pyridin-2-yl)-1,3-oxazolidine-3-oxyl), have molecular structure. Their coordination polyhedron, LnO<sub>7</sub>N<sub>2</sub>, can be described as a tricapped trigonal prism with symmetry close to <i>D</i><sub>3h</sub>. The value of 23 cm<sup>-1</sup> for the antiferromagnetic coupling Gd-Rad established from the <i>DC</i> magnetic and EPR data is a record strength for the complexes of 4f-elements with nitroxyl radicals. The terbium derivative displays frequency-dependent out-of-phase signals in zero field indicating single-molecule magnetic behavior with an effective barrier of 57 cm<sup>-1</sup>.

scholarly journals Magnetic Behavior of Luminescent Dinuclear Dysprosium and Terbium Complexes Derived from Phenoxyacetic Acid and 2,2’-Bipyridine

2019 ◽  
Vol 5 (4) ◽  
pp. 56 ◽  
Author(s):  
Mandal ◽  
Biswas ◽  
Yamashita
Keyword(s):  
Single Molecule ◽  
Energy Barrier ◽  
Magnetic Behavior ◽  
Magnetic Study ◽  
Luminescence Spectra ◽  
Phenoxyacetic Acid ◽  
Relaxation Processes ◽  
Single Molecule Magnet ◽  
Characteristic Emission ◽  
Terbium Complexes

Two dinuclear lanthanide complexes [Dy2(L1)6(L2)2]·2EtOH (1) and [Tb2(L1)6(L2)2]·2EtOH (2) (HL1 = phenoxyacetic acid and L2 = 2,2’-bipyridine) were synthesized and the crystal structures were determined. In both complexes, the lanthanide centers are nine-coordinated and have a muffin geometry. Detailed magnetic study reveals the presence of field-induced single molecule magnet (SMM) behavior for complex 1, whereas complex 2 is non-SMM in nature. Further magnetic study with 1’, yttrium doped magnetically diluted sample of 1, disclosed the presence of Orbach and Raman relaxation processes with effective energy barrier, ∆E = 16.26 cm−1 and relaxation time, τo = 2.42 × 10−8 s. Luminescence spectra for complexes 1 and 2 in acetonitrile were studied which show characteristic emission peaks for DyIII and TbIII ions, respectively.

Oximato-Based Ligands in 3d/4f-Metal Cluster Chemistry: A Family of {Cu3Ln} Complexes with a “Propeller”-like Topology and Single-Molecule Magnetic Behavior

2018 ◽  
Vol 57 (21) ◽  
pp. 13944-13952 ◽  
Author(s):  
Anne Worrell ◽  
Di Sun ◽  
Julia Mayans ◽  
Christos Lampropoulos ◽  
Albert Escuer ◽  
...  
Keyword(s):  
Single Molecule ◽  
Metal Cluster ◽  
Magnetic Behavior ◽  
Cluster Chemistry

scholarly journals Single-molecule magnet behavior in 2,2’-bipyrimidine-bridged dilanthanide complexes

2016 ◽  
Vol 7 ◽  
pp. 126-137 ◽  
Author(s):  
Wen Yu ◽  
Frank Schramm ◽  
Eufemio Moreno Pineda ◽  
Yanhua Lan ◽  
Olaf Fuhr ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Single Molecule ◽  
Energy Barrier ◽  
Lanthanide Complexes ◽  
Hysteresis Loops ◽  
Magnetic Behavior ◽  
Scanning Tunneling ◽  
Tunneling Microscopy ◽  
Single Molecule Magnet ◽  
Homogeneous Film

A series of 2,2’-bipyrimidine-bridged dinuclear lanthanide complexes with the general formula [Ln(tmhd)3]2bpm (tmhd = 2,2,6,6-tetramethyl-3,5-heptanedionate, bpm = 2,2’-bipyrimidine, Ln = Gd(III), 1; Tb(III), 2; Dy(III), 3; Ho(III), 4 and Er(III), 5) has been synthesized and characterized. Sublimation of [Tb(tmhd)3]2bpm onto a Au(111) surface leads to the formation of a homogeneous film with hexagonal pattern, which was studied by scanning tunneling microscopy (STM). The bulk magnetic properties of all complexes have been studied comprehensively. The dynamic magnetic behavior of the Dy(III) and Er(III) compounds clearly exhibits single molecule magnet (SMM) characteristics with an energy barrier of 97 and 25 K, respectively. Moreover, micro-SQUID measurements on single crystals confirm their SMM behavior with the presence of hysteresis loops.

Substituent effects of auxiliary ligands in mononuclear dibenzoylmethane DyIII/ErIII complexes: single-molecule magnetic behavior and luminescence properties

CrystEngComm ◽  
2020 ◽  
Vol 22 (45) ◽  
pp. 7929-7934
Author(s):  
Shan-Shan Liu ◽  
Bin Liu ◽  
Man-Man Ding ◽  
Yin-Shan Meng ◽  
Jia-Hui Jing ◽  
...  
Keyword(s):  
Single Molecule ◽  
Substituent Effects ◽  
Magnetic Behavior ◽  
Luminescence Properties

The single-molecule magnetic behavior and luminescence of [(dbm)3Ln(dmbipy)] and [(dbm)2Ln(dmobipy)(NO3)] are significantly modified by replacing the substituents of auxiliary ligands.

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