Dinuclear Lanthanide–Carboxylate Compounds: Field-Induced Slow Relaxation of Magnetization for Dysprosium(III) Analogue

2015 ◽  
Vol 68 (3) ◽  
pp. 488 ◽  
Author(s):  
Yi-Lei Li ◽  
Qing-Yan Liu ◽  
Cai-Ming Liu ◽  
Yu-Ling Wang ◽  
Ling Chen

Three chiral dinuclear lanthanide compounds, Ln2(µ2-L)4(L)2(phen)2 (Ln = Dy (1), Gd (2), and Er (3); phen = 1,10-phenanthroline), have been synthesized using the (S)-(+)-2-(6-methoxy-2-naphthyl)propionic acid (HL) ligand. The two lanthanide centres in compound Ln2(µ2-L)4(L)2(phen)2 are bridged by four carboxylate groups to give a dinuclear Ln2(µ2-L)4 core. The square antiprismatic coordination environment for each lanthanide centre is further completed by a chelating carboxylate group from another L– ligand and two nitrogen atoms from the phen ligand. A weak antiferromagnetic interaction between the two GdIII ions is observed in compound 2. The Dy analogue displays field-induced slow magnetic relaxation behaviour with an effective energy barrier Ueff/k of 17.24(2) K and a pre-exponential factor τ0 of 2.7(1) × 10–6 s. However, no slow relaxation phenomenon was observed for the Er derivative even in the presence of 2 kOe applied field.

Author(s):  
Matilde Fondo ◽  
Julio Corredoira-Vázquez ◽  
Ana M. Garcia-Deibe ◽  
Jesus Sanmartin Matalobos ◽  
Silvia Gómez-Coca ◽  
...  

Dinuclear [M(H3L1,2,4)]2 (M = Dy, Dy2; M = Ho, Ho2) complexes were isolated from an heptadentate aminophenol ligand. The crystal structures of Dy2·2THF, and the pyridine adducts Dy2·2Py and Ho2·2Py,...


2016 ◽  
Vol 52 (26) ◽  
pp. 4772-4775 ◽  
Author(s):  
Szymon Chorazy ◽  
Michał Rams ◽  
Anna Hoczek ◽  
Bernard Czarnecki ◽  
Barbara Sieklucka ◽  
...  

{CoII9[WV(CN)8]6} clusters capped by odd and even number of bidentate ligands reveal the improved slow magnetic relaxation due to the significant structural anisotropy.


2014 ◽  
Vol 67 (11) ◽  
pp. 1542 ◽  
Author(s):  
Michele Vonci ◽  
Colette Boskovic

Polyoxometalates are robust and versatile multidentate oxygen-donor ligands, eminently suitable for coordination to trivalent lanthanoid ions. To date, 10 very different structural families of such complexes have been found to exhibit slow magnetic relaxation due to single-molecule magnet (SMM) behaviour associated with the lanthanoid ions. These families encompass complexes with between one and four of the later lanthanoid ions: Tb, Dy, Ho, Er, and Yb. The lanthanoid coordination numbers vary between six and eleven and a range of coordination geometries are evident. The highest energy barrier to magnetisation reversal measured to date for a lanthanoid–polyoxometalate SMM is Ueff/kB = 73 K for the heterodinuclear Dy–Eu compound (Bu4N)8H4[DyEu(OH)2(γ-SiW10O36)2].


2019 ◽  
Vol 7 (29) ◽  
pp. 9057-9064 ◽  
Author(s):  
Juan Sun ◽  
Zan Sun ◽  
Kang Wang ◽  
Lu Xi ◽  
Yue Ma ◽  
...  

Unprecedented Cu–Ln heterometallic chains derived from poly-dentate nitronyl nitroxides are reported. A Tb complex shows slow magnetic relaxation, while a Dy derivative displays interesting two-step relaxations of magnetization.


2020 ◽  
Vol 49 (35) ◽  
pp. 12458-12465 ◽  
Author(s):  
Hanhan Chen ◽  
Lin Sun ◽  
Jinpeng Zhang ◽  
Zikang Xiao ◽  
Pengtao Ma ◽  
...  

Triangular {Er3} cluster containing POM exhibits field-induced two thermally activated relaxation processes. Whereas, the diamagnetic dilution sample indicates slow magnetic relaxation with the QTM being partially suppressed.


2018 ◽  
Vol 47 (41) ◽  
pp. 14734-14740 ◽  
Author(s):  
Javier Castells-Gil ◽  
José J. Baldoví ◽  
Carlos Martí-Gastaldo ◽  
Guillermo Mínguez Espallargas

Dehydration of a Dy-based MOF causes the appearance of slow-magnetic relaxation due to the changes of the charge density of the coordination environment.


RSC Advances ◽  
2018 ◽  
Vol 8 (39) ◽  
pp. 22046-22052 ◽  
Author(s):  
Yan-Qin Wang ◽  
Kun Wang ◽  
En-Qing Gao

A series of mixed-metal systems consisting of CoII1−xZnIIx chains with (μ-COO)2(μ-EO-N3) bridges were prepared, exhibiting interesting magnetic coupling and slow magnetic relaxation.


2015 ◽  
Vol 44 (44) ◽  
pp. 19282-19293 ◽  
Author(s):  
Sourav Biswas ◽  
Sourav Das ◽  
Jan van Leusen ◽  
Paul Kögerler ◽  
Vadapalli Chandrasekhar

A series of [2.2] spirocyclic complexes [Ln5(LH)4(η1-Piv)(η2-Piv)3(μ2–η2 η1Piv)2(H2O)]·Cl (Ln = DyIII, TbIII and HoIII) were synthesized. Magnetic analysis reveals that the DyIII analogue showed slow relaxation of magnetization.


2019 ◽  
Vol 48 (38) ◽  
pp. 14269-14278 ◽  
Author(s):  
Muhammad U. Anwar ◽  
Ahmed Al-Harrasi ◽  
Jeremy M. Rawson ◽  
Emma L. Gavey ◽  
Jeffery Regier ◽  
...  

A binuclear DyIII complex exhibits slow relaxation of magnetization under an applied dc field, while its tetranuclear counterpart exhibits “true” zero-field SMM behaviour.


Sign in / Sign up

Export Citation Format

Share Document