scholarly journals Synthesis, structure and magnetic properties of a series of Ln(iii) complexes with radical-anionic iminopyridine ligands: effect of lanthanide ions on the slow relaxation of the magnetization

2019 ◽  
Vol 48 (32) ◽  
pp. 12018-12022 ◽  
Author(s):  
Jérôme Long ◽  
Grigorii G. Skvortsov ◽  
Anton V. Cherkasov ◽  
Konstantin A. Lyssenko ◽  
Andrei I. Poddel'sky ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Lanthanide Ions ◽  
Slow Relaxation ◽  
Dysprosium Complex

Slow relaxation of the magnetization in radical iminopyridine dysprosium complex.

Synthesis, structure and magnetic properties of a series of dinuclear heteroleptic Zn2+/Ln3+ Schiff base complexes: effect of lanthanide ions on the slow relaxation of magnetization

2019 ◽  
Vol 48 (31) ◽  
pp. 11637-11641 ◽  
Author(s):  
Ahlem-Linda Boulkedid ◽  
Adel Beghidja ◽  
Chahrazed Beghidja ◽  
Yannick Guari ◽  
Joulia Larionova ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Schiff Base ◽  
Lanthanide Ions ◽  
Slow Relaxation ◽  
Schiff Base Complexes

We report the synthesis, structure and magnetic properties of a series of heteroleptic Zn2+/Ln3+ complexes of the formula [ZnLClLn(o-van)(H2O)(NO3)]·H2O exhibiting slow relaxation of their magnetization.

scholarly journals Design of Pure Heterodinuclear Lanthanoid Cryptate Complexes

2021 ◽  
Author(s):  
Christian Dirk Buch ◽  
Steen Hansen ◽  
Dmitri Mitcov ◽  
Camilla Mia Tram ◽  
Gary Nichol ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Magnetic Properties ◽  
13C Nmr ◽  
Exchange Coupling ◽  
Lanthanide Ions ◽  
Squid Magnetometry ◽  
Counter Ion ◽  
Synthetic Procedure ◽  
Optical And Magnetic Properties ◽  
Fine Tune

Heterolanthanide complexes are difficult to synthesize owing to the similar chemistry of the lanthanide ions. Conse-quently, very few purely heterolanthanide complexes have been synthesized. This is despite the fact that such complexes hold inter-esting optical and magnetic properties. To fine-tune these properties, it is important that one can choose complexes with any given combination of lanthanides. Herein we report a synthetic procedure which yields pure heterodinuclear lanthanide cryptates LnLn*LX3 (X = NO3- or OTf-) based on the cryptand H3L = N[(CH2)2N=CH-R-CH=N-(CH2)2]3N (R = m-C6H2OH-2-Me-5). In the synthesis the choice of counter ion and solvent prove crucial in controlling the Ln-Ln*composition. Choosing the optimal solvent and counter ion affords pure heterodinuclear complexes with any given combination of Gd(III)-Lu(III) including Y(III). To demon-strate the versatility of the synthesis all dinuclear combinations of Y(III), Gd(III), Yb(III) and Lu(III) were synthesized resulting in 10 novel complexes of the form LnLn*L(OTf)3 with LnLn* = YbGd 1, YbY 2, YbLu 3, YbYb 4, LuGd 5, LuY 6, LuLu 7, YGd 8, YY 9 and GdGd 10. Through the use of 1H, 13C NMR and mass spectrometry the heterodinuclear nature of YbGd, YbY, YbLu, LuGd, LuY and YGd was confirmed. Crystal structures of LnLn*L(NO3)3 reveal short Ln-Ln distances of ~3.5 Å. Using SQUID magnetometry the exchange coupling between the lanthanide ions was found to be anti-ferromagnetic for GdGd and YbYb while ferromagnetic for YbGd.

Trivalent lanthanide ions: versatile coordination centers with unique spectroscopic and magnetic properties

2000 ◽  
Vol 303-304 ◽  
pp. 66-74 ◽  
Author(s):  
Jean-Claude G. Bünzli ◽  
Nicolas André ◽  
Mourad Elhabiri ◽  
Gilles Muller ◽  
Claude Piguet
Keyword(s):  
Magnetic Properties ◽  
Lanthanide Ions ◽  
Trivalent Lanthanide

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.

Syntheses, structures and magnetic properties of macrocyclic Schiff base-supported homodinuclear lanthanide complexes

2018 ◽  
Vol 47 (33) ◽  
pp. 11696-11704 ◽  
Author(s):  
Feng Gao ◽  
Yi-Quan Zhang ◽  
Wang Sun ◽  
Huan Liu ◽  
Xiaoyu Chen
Keyword(s):  
Magnetic Properties ◽  
Schiff Base ◽  
Theoretical Analysis ◽  
Lanthanide Complexes ◽  
Magnetic Measurements ◽  
Dysprosium Complex ◽  
Macrocyclic Schiff Base

Five macrocyclic Schiff base-supported homodinuclear lanthanide complexes were successfully designed and synthesized by template strategy. Theoretical analysis and magnetic measurements reveal dysprosium complex 1 behaves as a typical SMM with intramolecular ferromagnetic Dy3+⋯Dy3+ interaction.

scholarly journals Design of Pure Heterodinuclear Lanthanoid Cryptate Complexes

2021 ◽  
Author(s):  
Christian Dirk Buch ◽  
Steen Hansen ◽  
Dmitri Mitcov ◽  
Camilla Mia Tram ◽  
Gary Nichol ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Magnetic Properties ◽  
13C Nmr ◽  
Exchange Coupling ◽  
Lanthanide Ions ◽  
Squid Magnetometry ◽  
Counter Ion ◽  
Synthetic Procedure ◽  
Optical And Magnetic Properties ◽  
Fine Tune

Heterolanthanide complexes are difficult to synthesize owing to the similar chemistry of the lanthanide ions. Conse-quently, very few purely heterolanthanide complexes have been synthesized. This is despite the fact that such complexes hold inter-esting optical and magnetic properties. To fine-tune these properties, it is important that one can choose complexes with any given combination of lanthanides. Herein we report a synthetic procedure which yields pure heterodinuclear lanthanide cryptates LnLn*LX3 (X = NO3- or OTf-) based on the cryptand H3L = N[(CH2)2N=CH-R-CH=N-(CH2)2]3N (R = m-C6H2OH-2-Me-5). In the synthesis the choice of counter ion and solvent prove crucial in controlling the Ln-Ln*composition. Choosing the optimal solvent and counter ion affords pure heterodinuclear complexes with any given combination of Gd(III)-Lu(III) including Y(III). To demon-strate the versatility of the synthesis all dinuclear combinations of Y(III), Gd(III), Yb(III) and Lu(III) were synthesized resulting in 10 novel complexes of the form LnLn*L(OTf)3 with LnLn* = YbGd 1, YbY 2, YbLu 3, YbYb 4, LuGd 5, LuY 6, LuLu 7, YGd 8, YY 9 and GdGd 10. Through the use of 1H, 13C NMR and mass spectrometry the heterodinuclear nature of YbGd, YbY, YbLu, LuGd, LuY and YGd was confirmed. Crystal structures of LnLn*L(NO3)3 reveal short Ln-Ln distances of ~3.5 Å. Using SQUID magnetometry the exchange coupling between the lanthanide ions was found to be anti-ferromagnetic for GdGd and YbYb while ferromagnetic for YbGd.

Magnetic properties of organolanthanide(II) complexes, from electronic structure and crystal field effect

2021 ◽  
Author(s):  
Eduardo Solis Céspedes ◽  
Dayán Páez-Hernández
Keyword(s):  
Magnetic Properties ◽  
Electronic Structure ◽  
Crystal Field ◽  
Oxidation State ◽  
Field Effect ◽  
Organometallic Complexes ◽  
Lanthanide Ions ◽  
Crystal Field Effect

Magnetic properties of a series of organometallic complexes [LnCp3 ]- and Ln(CNT)2, were Cp =cyclopentadienyl and CNT = ciclononatetraenyl, of the lanthanide ions in 2+ oxidation state, are theoretically studied...

Structural description, luminescent and magnetic properties of novel 2-D coordination polymers containing thiazolo[5,4-d]thiazole rings and trivalent lanthanide ions

2018 ◽  
Vol 268 ◽  
pp. 94-101 ◽  
Author(s):  
Rodolfo Fernandes Pereira Clementino ◽  
Arthur Bernardo de Souza Santos ◽  
Otávio José Bandeira Jovino Marques ◽  
Danilo Roberto Ratkovski ◽  
Claudia Cristina Gatto ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Coordination Polymers ◽  
Lanthanide Ions ◽  
Structural Description ◽  
Trivalent Lanthanide
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