A series of [2 × 2] square grid LnIII4 clusters: a large magnetocaloric effect and single-molecule-magnet behavior

2019 ◽  
Vol 43 (19) ◽  
pp. 7419-7426 ◽  
Author(s):  
Wen-Min Wang ◽  
Xian-Zhen Li ◽  
Li Zhang ◽  
Jia-Li Chen ◽  
Jun-Hua Wang ◽  
...  
Keyword(s):  
Schiff Base ◽  
Magnetocaloric Effect ◽  
Single Molecule ◽  
Schiff Base Ligand ◽  
Relaxation Behavior ◽  
Slow Relaxation ◽  
Magnetic Studies ◽  
Single Molecule Magnet ◽  
Square Grid

Four new [2 × 2] square grid LnIII4 clusters were successfully synthesized by employing a multidentate chelating Schiff base ligand. Magnetic studies showed that cluster 1 displays a larger magnetocaloric effect (−ΔSm = 34.46 J kg−1 K−1 for ΔH = 7.0 T at 2.0 K), while 3 exhibits slow relaxation behavior under a zero dc field, with ΔE/kB of 42.76 K and τ0 of 1.02 × 10−6 s.

Modulating single-molecule magnet behavior towards multiple magnetic relaxation processes through structural variation in Dy4 clusters

2018 ◽  
Vol 5 (8) ◽  
pp. 1876-1885 ◽  
Author(s):  
Wen-Min Wang ◽  
Xiao-Min Kang ◽  
Hai-Yun Shen ◽  
Zhi-Lei Wu ◽  
Hong-Ling Gao ◽  
...  
Keyword(s):  
Schiff Base ◽  
Single Molecule ◽  
Schiff Base Ligand ◽  
Magnetic Relaxation ◽  
Structural Variation ◽  
Slow Relaxation ◽  
Relaxation Processes ◽  
Magnetic Studies ◽  
Single Molecule Magnet

Three Dy4 clusters based on a flexible and attractive Schiff base ligand HL have been synthesized, and they showed different tetranuclear core arrangements. Magnetic studies reveal that clusters 1–3 display distinct slow relaxation of magnetization.

Designing asymmetric Dy2 single-molecule magnets with two-step relaxation processes by the modification of the coordination environments of Dy(iii) ions

2020 ◽  
Vol 49 (26) ◽  
pp. 8976-8984
Author(s):  
Yuan Huang ◽  
Jia-Xin Li ◽  
Yu Ge ◽  
Xia-Mei Zhang ◽  
Yang Xu ◽  
...  
Keyword(s):  
Schiff Base ◽  
Single Molecule ◽  
Schiff Base Ligand ◽  
Slow Relaxation ◽  
Relaxation Processes ◽  
Single Molecule Magnets ◽  
Single Molecule Magnet

The reaction of Dy(NO3)3·6H2O and an asymmetric Schiff-base ligand H2L afforded two asymmetric dinuclear compound. Both complexes exhibit single-molecule magnet behavior with two-step slow relaxation processes.

Heteronuclear Ni(ii)–Ln(iii) (Ln = La, Pr, Tb, Dy) complexes: synthesis and single-molecule magnet behaviour

2016 ◽  
Vol 45 (8) ◽  
pp. 3616-3626 ◽  
Author(s):  
Apoorva Upadhyay ◽  
Chinmoy Das ◽  
Stuart K. Langley ◽  
Keith S. Murray ◽  
Anant K. Srivastava ◽  
...  
Keyword(s):  
Magnetic Susceptibility ◽  
Schiff Base ◽  
Crystal Structures ◽  
Single Molecule ◽  
Schiff Base Ligand ◽  
Ac Magnetic Susceptibility ◽  
Frequency Dependent ◽  
Single Molecule Magnet

The crystal structures are reported for three heterometallic Ni2Ln and a Ni2Dy2 complex, using the Schiff base ligand 2-methoxy-6-[(E)-phenyliminomethyl] phenol. Detailed dc and ac magnetic susceptibility studies were reported for all the complexes. The complexes 3 and 4 shows frequency dependent out-of-phase susceptibility signals.

Structures, fluorescence properties and magnetic properties of a series of rhombus-shaped LnIII4 clusters: magnetocaloric effect and single-molecule-magnet behavior

2019 ◽  
Vol 43 (33) ◽  
pp. 12941-12949 ◽  
Author(s):  
Wen-Min Wang ◽  
Li Zhang ◽  
Xian-Zhen Li ◽  
Li-Yuan He ◽  
Xin-Xin Wang ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Magnetocaloric Effect ◽  
Single Molecule ◽  
Magnetic Relaxation ◽  
Magnetic Refrigeration ◽  
Fluorescence Properties ◽  
Relaxation Processes ◽  
Magnetic Studies ◽  
Single Molecule Magnet ◽  
Slow Magnetic Relaxation

A family LnIII4 clusters were successfully synthesized and structurally characterized. Magnetic studies show that Gd4 cluster displays magnetic refrigeration, while Dy4 cluster demonstrates two distinct slow magnetic relaxation processes.

Cyanide-bridged single molecule magnet based on a manganese(III) complex with TTF-fused Schiff base ligand

2014 ◽  
Vol 58 (4) ◽  
pp. 650-657 ◽  
Author(s):  
Long Cui ◽  
Feifei Zhu ◽  
Chanel F. Leong ◽  
Jing Ru ◽  
Feng Gao ◽  
...  
Keyword(s):  
Schiff Base ◽  
Single Molecule ◽  
Schiff Base Ligand ◽  
Single Molecule Magnet

Linear-shaped LnIII4 and LnIII6 clusters constructed by a polydentate Schiff base ligand and a β-diketone co-ligand: structures, fluorescence properties, magnetic refrigeration and single-molecule magnet behavior

2019 ◽  
Vol 48 (44) ◽  
pp. 16744-16755 ◽  
Author(s):  
Wen-Min Wang ◽  
Li-Yuan He ◽  
Xin-Xin Wang ◽  
Ying Shi ◽  
Zhi-Lei Wu ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Schiff Base ◽  
Single Molecule ◽  
Schiff Base Ligand ◽  
Magnetic Refrigeration ◽  
Fluorescence Properties ◽  
Single Molecule Magnet

A series of linear-shaped LnIII4 and LnIII6 clusters were synthesized. The structures, fluorescence properties and magnetic properties have been deeply studied.

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