Excited-state effects on magnetic properties of U(iii) and U(iv) pyrazolylborate complexes

2019 ◽  
Vol 55 (71) ◽  
pp. 10611-10614
Author(s):  
Robert F. Higgins ◽  
Caleb J. Tatebe ◽  
Suzanne C. Bart ◽  
Matthew P. Shores
Keyword(s):  
Magnetic Properties ◽  
Excited State ◽  
Slow Relaxation ◽  
State Mixing

For a family of uranium pyrazolylborate complexes, we observe correlations between excited-state mixing and slow relaxation of magnetization for U(iii) complexes, and U⋯B distances in U(iv) complexes.

scholarly journals Slow Relaxation of the Magnetization in Bis-Decorated Chiral Helicene-Based Coordination Complexes of Lanthanides

2018 ◽  
Vol 4 (3) ◽  
pp. 39 ◽  
Author(s):  
Jessica Flores Gonzalez ◽  
Vincent Montigaud ◽  
Nidal Saleh ◽  
Olivier Cador ◽  
Jeanne Crassous ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Ab Initio Calculations ◽  
Ab Initio ◽  
Single Molecule ◽  
Crystalline Phase ◽  
Coordination Complexes ◽  
Slow Relaxation ◽  
Single Molecule Magnets ◽  
Racemic Form

The complexes [Ln2(hfac)6(L)]·nC6H14 (Ln = Dy (1) n = 0, Yb (2) n = 1) with the L chiral 3,14-di-(2-pyridyl)-4,13-diaza[6]helicene ligand (hfac− = 1,1,1,5,5,5-hexafluoroacetylacetonate) have been synthesized in their racemic form and structurally and magnetically characterized. Both complexes behave as field-induced single molecule magnets in the crystalline phase. These magnetic properties were rationalized by ab initio calculations.

scholarly journals Increasing the effective energy barrier promoted by the change of a counteranion in a Zn–Dy–Zn SMM: slow relaxation via the second excited state

2015 ◽  
Vol 51 (62) ◽  
pp. 12353-12356 ◽  
Author(s):  
I. Oyarzabal ◽  
J. Ruiz ◽  
E. Ruiz ◽  
D. Aravena ◽  
J. M. Seco ◽  
...  
Keyword(s):  
Excited State ◽  
Energy Barrier ◽  
Slow Relaxation ◽  
Effective Energy ◽  
Magnetization Relaxation

Slow magnetization relaxation via the second excited state with a Ueff = 186 cm−1 has been observed in a Zn–Dy–Zn complex.

Cross Sections for Excited-State Mixing in Cesium-Noble-Gas Collisions fromD2Optical Pumping

1967 ◽  
Vol 163 (1) ◽  
pp. 45-53 ◽  
Author(s):  
J. Fricke ◽  
J. Haas ◽  
E. Lüscher ◽  
F. A. Franz
Keyword(s):  
Excited State ◽  
Cross Sections ◽  
Noble Gas ◽  
State Mixing

Excited-State Mixing in the Optical Pumping of Alkali-Metal Vapors

1966 ◽  
Vol 148 (1) ◽  
pp. 82-89 ◽  
Author(s):  
Frank A. Franz ◽  
Judy R. Franz
Keyword(s):  
Excited State ◽  
Alkali Metal ◽  
Optical Pumping ◽  
Metal Vapors ◽  
State Mixing

scholarly journals Field-Induced Slow Relaxation in a Dinuclear Dysprosium(III) Complex Based on 3-Methoxycinnamic Acid

Inorganics ◽  
2018 ◽  
Vol 6 (1) ◽  
pp. 35 ◽  
Author(s):  
Ouafa Khalfaoui ◽  
Adel Beghidja ◽  
Jérôme Long ◽  
Chahrazed Beghidja ◽  
Yannick Guari ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Structural Organization ◽  
Slow Relaxation ◽  
Spin Lattice ◽  
Methoxycinnamic Acid

We report the synthesis, structure, and magnetic properties of a new dinuclear dysprosium(III) complex based on a 3-methoxycinnamate ligand. The centrosymmetric complex exhibits a field-induced SMM behavior. In contrast to the previously reported lanthanide-based systems with cinnamate derivatives that relax through a combination of Raman and direct processes, an Orbach process is also involved in highlighting the role of the structural organization over the spin-lattice relaxations.

Isostructural lanthanide-based metal–organic frameworks: structure, photoluminescence and magnetic properties

2018 ◽  
Vol 47 (3) ◽  
pp. 925-934 ◽  
Author(s):  
Li-Lin Luo ◽  
Xiang-Long Qu ◽  
Zheng Li ◽  
Xia Li ◽  
Hao-Ling Sun
Keyword(s):  
Magnetic Properties ◽  
Single Molecule ◽  
Metal Organic Frameworks ◽  
Magnetic Behavior ◽  
Slow Relaxation ◽  
Luminescence Properties ◽  
Metal Organic ◽  
The Eu

Highly stable 3D Ln-MOFs were constructed. The Eu-MOF shows good luminescence properties while the Dy-MOF shows a typical single-molecule magnetic behavior with a slow relaxation of magnetization.

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