Six coordinate dinuclear lanthanide(III) amide complexes: Investigation of magnetization Relaxation dynamics and their electronic structures

2021 ◽  
Author(s):  
Maheswaran Shanmugam ◽  
Amaleswari Rasamsetty ◽  
Sakshi Mehta ◽  
Kamal Uddin Ansari ◽  
Pardeep Kumar ◽  
...  
Keyword(s):  
Electronic Structures ◽  
Relaxation Dynamics ◽  
Magnetic Studies ◽  
Magnetization Relaxation

A series of rare six-coordinate dinuclear Ln(III) complexes [Ln2(µ-Cl)2Cl4Li2(L)2(THF)6] were structurally characterized using a bulky amide ligand (L; Ln = Gd(1); Dy(2) and Y(3)). Detailed magnetic studies disclose that a...

Electronic structures and magnetic studies of SmFeO3 thin films and powders

2021 ◽  
Vol 527 ◽  
pp. 167724
Author(s):  
Jingdong Shen ◽  
Huihui Zhao ◽  
Baofu Song ◽  
Ruobai Liu ◽  
Jun Du ◽  
...  
Keyword(s):  
Thin Films ◽  
Electronic Structures ◽  
Magnetic Studies

Substituted versus Naked Thiourea Ligand Containing Pseudotetrahedral Cobalt(II) Complexes: A Comparative Study on Its Magnetization Relaxation Dynamics Phenomenon

2018 ◽  
Vol 57 (6) ◽  
pp. 3371-3386 ◽  
Author(s):  
Shefali Vaidya ◽  
Pragya Shukla ◽  
Shalini Tripathi ◽  
Eric Rivière ◽  
Talal Mallah ◽  
...  
Keyword(s):  
Comparative Study ◽  
Relaxation Dynamics ◽  
Magnetization Relaxation

Influence of anion induced geometry change in Zn(ii) on the magnetization relaxation dynamics of Dy(iii) in Zn–Dy–Zn complexes

2020 ◽  
Vol 49 (30) ◽  
pp. 10580-10593
Author(s):  
Pragya Shukla ◽  
Kamal Uddin Ansari ◽  
Chen Gao ◽  
Shefali Vaidya ◽  
Shalini Tripathi ◽  
...  
Keyword(s):  
Experimental Results ◽  
Magnetic Data ◽  
Relaxation Dynamics ◽  
Magnetization Relaxation

A series of [Zn2Dy(L1)2(OAc)4](X) where X = (NO3)0.92(Br)0.08 (1), ClO4 (2), Cl (3) and PF6 (4) complexes were synthesized and their dc and ac magnetic data investigated. Experimental results are validated through MOLCAS calculations.

Copper (ii) dimers stabilized by bis(phenol) amine ligands: theoretical and experimental insights

2018 ◽  
Vol 42 (15) ◽  
pp. 12621-12631 ◽  
Author(s):  
Amit Rajput ◽  
Akhilesh Kumar ◽  
Arunava Sengupta ◽  
Priyanka Tyagi ◽  
Himanshu Arora
Keyword(s):  
Dft Calculations ◽  
Electronic Structures ◽  
Electronic Transitions ◽  
Magnetic Studies ◽  
Td Dft ◽  
Amine Ligands ◽  
Cu Complexes ◽  
Exogenous Ligand

Comparative structural and magnetic studies on the binuclear Cu complexes of 1L(2−)/2L(2−) have been done and their electronic structures and observed electronic transitions (DFT and TD-DFT calculations) rationalized. The dimer complex can be converted into the corresponding monomeric Cu(ii) complex, [1L2CuII2(X)] (X = py), by adding an exogenous ligand such as pyridine (py).

scholarly journals Magnetization relaxation dynamics in [Co/Pt]3 multilayers on pico- and nanosecond timescales

2021 ◽  
Vol 3 (3) ◽  
Author(s):  
Fangzhou Wang ◽  
Daniel E. Bürgler ◽  
Roman Adam ◽  
Umut Parlak ◽  
Derang Cao ◽  
...  
Keyword(s):  
Relaxation Dynamics ◽  
Magnetization Relaxation

scholarly journals Asymmetric Dinuclear Lanthanide(III) Complexes from the Use of a Ligand Derived from 2-Acetylpyridine and Picolinoylhydrazide: Synthetic, Structural and Magnetic Studies

Molecules ◽  
2020 ◽  
Vol 25 (14) ◽  
pp. 3153
Author(s):  
Diamantoula Maniaki ◽  
Panagiota S. Perlepe ◽  
Evangelos Pilichos ◽  
Sotirios Christodoulou ◽  
Mathieu Rouzières ◽  
...  
Keyword(s):  
Single Molecule ◽  
Metal Ion ◽  
Ac Susceptibility ◽  
Solvent Molecule ◽  
Exchange Interactions ◽  
Experimental Fact ◽  
Anisotropy Axis ◽  
Magnetic Studies ◽  
Single Molecule Magnets ◽  
Magnetization Relaxation

A family of four Ln(III) complexes has been synthesized with the general formula [Ln2(NO3)4(L)2(S)] (Ln = Gd, Tb, Er, and S = H2O; 1, 2 and 4, respectively/Ln = Dy, S = MeOH, complex 3), where HL is the flexible ditopic ligand N’-(1-(pyridin-2-yl)ethylidene)pyridine-2-carbohydrazide. The structures of isostructural MeOH/H2O solvates of these complexes were determined by single-crystal X-ray diffraction. The two LnIII ions are doubly bridged by the deprotonated oxygen atoms of two “head-to-head” 2.21011 (Harris notation) L¯ ligands, forming a central, nearly rhombic {LnIII2(μ-OR)2}4+ core. Two bidentate chelating nitrato groups complete a sphenocoronal 10-coordination at one metal ion, while two bidentate chelating nitrato groups and one solvent molecule (H2O or MeOH) complete a spherical capped square antiprismatic 9-coordination at the other. The structures are critically compared with those of other, previously reported metal complexes of HL or L¯. The IR spectra of 1–4 are discussed in terms of the coordination modes of the organic and inorganic ligands involved. The f-f transitions in the solid-state (diffuse reflectance) spectra of the Tb(III), Dy(III), and Er(III) complexes have been fully assigned in the UV/Vis and near-IR regions. Magnetic susceptibility studies in the 1.85–300 K range reveal the presence of weak, intramolecular GdIII∙∙∙GdIII antiferromagnetic exchange interactions in 1 [J/kB = −0.020(6) K based on the spin Hamiltonian Ĥ = −2J(ŜGd1∙ ŜGd2)] and probably weak antiferromagnetic LnIII∙∙∙LnIII exchange interactions in 2–4. Ac susceptibility measurements in zero dc field do not show frequency dependent out-of-phase signals, and this experimental fact is discussed for 3 in terms of the magnetic anisotropy axis for each DyIII center and the oblate electron density of this metal ion. Complexes 3 and 4 are Single-Molecule Magnets (SMMs) and this behavior is optimally observed under external dc fields of 600 and 1000 Oe, respectively. The magnetization relaxation pathways are discussed and a satisfactory fit of the temperature and field dependencies of the relaxation time τ was achieved considering a model that employs Raman, direct, and Orbach relaxation mechanisms.

Magnetization relaxation dynamics of a rare coordinatively unsaturated Co(ii) complex: experimental and theoretical insights

2020 ◽  
Vol 56 (87) ◽  
pp. 13397-13400
Author(s):  
Chinmoy Das ◽  
Amaleswari Rasamsetty ◽  
Shalini Tripathi ◽  
Maheswaran Shanmugam
Keyword(s):  
Molecular Formula ◽  
Relaxation Dynamics ◽  
Magnetization Relaxation ◽  
Turn On ◽  
Epr Measurements

A three-coordinate Co(ii) complex with the molecular formula [Li(DME)3][Co(L)3] (1) was isolated. The influence of the geometry on the SH parameters, and in turn on the magnetization relaxation, is investigated by SQUID and EPR measurements.

Magneto-thermal and magnetization relaxation dynamics of a family of di-nuclear lanthanide complexes

Polyhedron ◽  
2022 ◽  
Vol 212 ◽  
pp. 115613
Author(s):  
Kamal Uddin Ansari ◽  
Amaleswari Rasamsetty ◽  
Pardeep Kumar ◽  
Pragya Shukla ◽  
Shalini Tripathi ◽  
...  
Keyword(s):  
Lanthanide Complexes ◽  
Relaxation Dynamics ◽  
Magnetization Relaxation

Influence of Radicals on Magnetization Relaxation Dynamics of Pseudo-Octahedral Lanthanide Iminopyridyl Complexes

2018 ◽  
Vol 57 (15) ◽  
pp. 9002-9011 ◽  
Author(s):  
Chinmoy Das ◽  
Apoorva Upadhyay ◽  
Maheswaran Shanmugam
Keyword(s):  
Relaxation Dynamics ◽  
Magnetization Relaxation
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