scholarly journals Evolvement of molecular nanomagnets in China

2013 ◽  
Vol 371 (2000) ◽  
pp. 20120316 ◽  
Author(s):  
Bing-Wu Wang ◽  
Xin-Yi Wang ◽  
Hao-Ling Sun ◽  
Shang-Da Jiang ◽  
Song Gao
Keyword(s):  
Single Molecule ◽  
Information Science ◽  
Magnetic Characteristics ◽  
Single Chain ◽  
Design Synthesis ◽  
Single Molecule Magnet ◽  
Molecular Nanomagnets ◽  
Initial Cluster ◽  
Slow Magnetic Relaxation ◽  
Cluster Type

Molecular nanomagnets have been undergoing development for 20 years since the first single-molecule magnet (SMM), Mn 12 Ac, was characterized as the molecule-behaved magnet. The multi-disciplinary scientists promoted the magnetic characteristics to be more suitable for use in information science and spintronics. The concept of molecular nanomagnets has also evolved to include single-chain magnets (SCMs), single-ion magnets (SIMs) and even magnetic molecules that showed only slow magnetic relaxation, in addition to the initial cluster-type SMMs. In this review, several aspects, including SMMs, SCMs and SIMs, are introduced briefly through some representative examples. In particular, the contribution of Chinese chemists is highlighted in the design, synthesis and understanding of various types of molecular nanomagnets.

Slow magnetic relaxation in dinuclear dysprosium and holmium phenoxide bridged complexes: a Dy2 single molecule magnet with a high energy barrier

2021 ◽  
Author(s):  
Matilde Fondo ◽  
Julio Corredoira-Vázquez ◽  
Ana M. Garcia-Deibe ◽  
Jesus Sanmartin Matalobos ◽  
Silvia Gómez-Coca ◽  
...  
Keyword(s):  
Crystal Structures ◽  
Single Molecule ◽  
Energy Barrier ◽  
Magnetic Relaxation ◽  
High Energy ◽  
Single Molecule Magnet ◽  
High Energy Barrier ◽  
Slow Magnetic Relaxation

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,...

Polyoxometalate-Supported Lanthanoid Single-Molecule Magnets

2014 ◽  
Vol 67 (11) ◽  
pp. 1542 ◽  
Author(s):  
Michele Vonci ◽  
Colette Boskovic
Keyword(s):  
Single Molecule ◽  
Energy Barrier ◽  
Magnetic Relaxation ◽  
Donor Ligands ◽  
Single Molecule Magnets ◽  
Single Molecule Magnet ◽  
Coordination Numbers ◽  
Oxygen Donor ◽  
Slow Magnetic Relaxation

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].

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.

Single-Chain Magnet (NEt4)[Mn2(5-MeOsalen)2Fe(CN)6] Made of MnIII−FeIII−MnIIITrinuclear Single-Molecule Magnet with anST=9/2Spin Ground State

2005 ◽  
Vol 127 (9) ◽  
pp. 3090-3099 ◽  
Author(s):  
Marilena Ferbinteanu ◽  
Hitoshi Miyasaka ◽  
Wolfgang Wernsdorfer ◽  
Kazuya Nakata ◽  
Ken-ichi Sugiura ◽  
...  
Keyword(s):  
Single Molecule ◽  
Ground State ◽  
Single Chain ◽  
Single Molecule Magnet

A mononuclear five-coordinate Co(ii) single molecule magnet with a spin crossover between the S = 1/2 and 3/2 states

2018 ◽  
Vol 47 (46) ◽  
pp. 16596-16602 ◽  
Author(s):  
Lei Chen ◽  
Jingbo Song ◽  
Wen Zhao ◽  
Gangji Yi ◽  
Zhikuan Zhou ◽  
...  
Keyword(s):  
Hysteresis Loop ◽  
Single Molecule ◽  
Magnetic Relaxation ◽  
Spin Crossover ◽  
Spin Transition ◽  
Single Molecule Magnet ◽  
Pyramidal Geometry ◽  
Mononuclear Cobalt ◽  
Slow Magnetic Relaxation ◽  
Square Pyramidal Geometry

A mononuclear cobalt(ii) complex with square pyramidal geometry displays a spin transition with a small hysteresis loop and slow magnetic relaxation.

Zero-field slow magnetic relaxation in a uranium(iii) complex with a radical ligand

2014 ◽  
Vol 50 (71) ◽  
pp. 10262-10264 ◽  
Author(s):  
Joana T. Coutinho ◽  
Maria A. Antunes ◽  
Laura C. J. Pereira ◽  
Joaquim Marçalo ◽  
Manuel Almeida
Keyword(s):  
Single Molecule ◽  
Magnetic Relaxation ◽  
Zero Field ◽  
Single Molecule Magnet ◽  
Slow Magnetic Relaxation ◽  
Bipyridine Ligand ◽  
Radical Ligand

Single-molecule-magnet behaviour in [U(TpMe2)2(bipy˙)], a U(iii) complex with a radical bipyridine ligand, having magnetic contributions from both the metal and the ligand.

Single-Molecule Magnet Behavior of a Tetranuclear Iron(III) Complex. The Origin of Slow Magnetic Relaxation in Iron(III) Clusters

1999 ◽  
Vol 121 (22) ◽  
pp. 5302-5310 ◽  
Author(s):  
A. L. Barra ◽  
A. Caneschi ◽  
A. Cornia ◽  
F. Fabrizi de Biani ◽  
D. Gatteschi ◽  
...  
Keyword(s):  
Single Molecule ◽  
Magnetic Relaxation ◽  
Single Molecule Magnet ◽  
Slow Magnetic Relaxation

scholarly journals A Mixed Valence CoIICoIII2 Field-Supported Single Molecule Magnet: Solvent-Dependent Structural Variation

Molecules ◽  
2021 ◽  
Vol 26 (4) ◽  
pp. 1060
Author(s):  
Susanta Hazra ◽  
Cyril Rajnák ◽  
Ján Titiš ◽  
M. Fátima C. Guedes da Silva ◽  
Roman Boča ◽  
...  
Keyword(s):  
Single Molecule ◽  
Structural Variation ◽  
Mixed Valence ◽  
Low Frequency ◽  
Structural Features ◽  
Ac Magnetic Susceptibility ◽  
Frequency Channel ◽  
One Pot ◽  
Single Molecule Magnet ◽  
Slow Magnetic Relaxation

One-pot reaction of the Schiff base N,N’-ethylene bis(salicylaldimine) (H2L), CoCl2.6H2O, and [Ph2SnCl2] in acetone produces the mixed valence CoIICoIII2 compound [CoIICoIII2(μ-L)2(Ph)2(μ-Cl)2]·(CH3)2CO·H2O (1). Our recent study already revealed that the same reaction mixtures in methanol or ethanol produced a heterometallic SnIVCoIII (2) or monometallic CoIII complex (3), respectively. Comparison of these organometallic systems shows that the 2,1-intermetallic Ph shift occurs in any of those solvents, but their relevant structural features (mononuclear, dinuclear-heterometallic, and trinuclear mixed valence) are solvent dependent. Geometrical structural rotation is also discussed among the related organometallic CoIICoIII2 systems. The AC magnetic susceptibility measurements indicate that 1 is a single molecule magnet (SMM), exhibiting a field-induced slow magnetic relaxation with two modes. The relaxation time for the low-frequency channel is as slow as τ~0.6 s at T = 2.0 K and BDC = 1.0 T.

Two field-induced slow magnetic relaxation processes in a mononuclear Co(ii) complex with a distorted octahedral geometry

2016 ◽  
Vol 45 (22) ◽  
pp. 9279-9284 ◽  
Author(s):  
Jing Li ◽  
Yuan Han ◽  
Fan Cao ◽  
Rong-Min Wei ◽  
Yi-Quan Zhang ◽  
...  
Keyword(s):  
Single Molecule ◽  
Magnetic Relaxation ◽  
Easy Axis ◽  
Octahedral Geometry ◽  
Distorted Octahedral Geometry ◽  
Relaxation Processes ◽  
Single Molecule Magnet ◽  
Distorted Octahedral ◽  
Slow Magnetic Relaxation

An easy-axis distorted octahedral mononuclear Co(ii) single-molecule magnet showing two filed-induced slow magnetic relaxation processes.

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