Physical stimulus and chemical modulations of bistable molecular magnetic materials

In this Feature Article, we summarize the recent progress made in modulating the multifaceted magnetic behaviour of single-molecule magnets (SMMs) and spin-crossover (SCO) materials based on chemical modifications and external stimuli.

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Recent progress on cyano-bridged transition-metal-based single-molecule magnets and single-chain magnets

Coordination Chemistry Reviews ◽

10.1016/j.ccr.2020.213617 ◽

2021 ◽

Vol 428 ◽

pp. 213617

Author(s):

Jin-Hua Wang ◽

Zhao-Yang Li ◽

Masahiro Yamashita ◽

Xian-He Bu

Keyword(s):

Transition Metal ◽

Single Molecule ◽

Recent Progress ◽

Single Chain ◽

Single Molecule Magnets ◽

Single Chain Magnets

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Cu(ii)–Dy(iii) and Co(iii)–Dy(iii) based single molecule magnets with multiple slow magnetic relaxation processes in the Cu(ii)–Dy(iii) complex

Dalton Transactions ◽

10.1039/c5dt00960j ◽

2015 ◽

Vol 44 (29) ◽

pp. 13242-13249 ◽

Cited By ~ 28

Author(s):

Malay Dolai ◽

Mahammad Ali ◽

Ján Titiš ◽

Roman Boča

Keyword(s):

Schiff Base ◽

Single Molecule ◽

Schiff Base Ligand ◽

Magnetic Relaxation ◽

Magnetic Behaviour ◽

Dinuclear Complexes ◽

Relaxation Processes ◽

Single Molecule Magnets ◽

Slow Magnetic Relaxation

Two CuII–DyIII and CoIII–DyIII dinuclear complexes of a Schiff base ligand (H3L) exhibit single-molecule magnetic behaviour with multiple slow magnetic relaxation processes for the former.

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Addressing single spin crossover molecules in a two-dimensional monolayer

10.21203/rs.3.rs-251042/v1 ◽

2021 ◽

Author(s):

Yongfeng Tong ◽

Massine Kelaï ◽

Kaushik Bairagi ◽

Vincent Repain ◽

Jérôme Lagoute ◽

...

Keyword(s):

Spin State ◽

Single Molecule ◽

Spin Crossover ◽

Cooperative Behaviour ◽

Spintronic Devices ◽

Single Spin ◽

Elastic Interactions ◽

Molecular Spin ◽

External Stimuli ◽

At Will

Abstract Bistable spin-crossover molecules are particularly interesting to the development of innovative electronic and spintronic devices as they present two spin states that can be controlled by external stimuli. In this purpose, being able to switch at will the spin state of a single molecule in a dense molecular array is a key milestone. However, the elastic interactions between the molecules favour more cooperative behaviour where patches of neighbouring molecules switches simultaneously. We demonstrate here that the interaction of iron II spin-crossover molecules with a metallic substrate can strongly reduce their cooperative behaviour until addressing independently single molecular spin state. Mechanoelastic model is able to reproduce well such findings.

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Electro-activity and magnetic switching in lanthanide-based single-molecule magnets

Inorganic Chemistry Frontiers ◽

10.1039/c9qi00875f ◽

2019 ◽

Vol 6 (12) ◽

pp. 3398-3417 ◽

Cited By ~ 15

Author(s):

Olivier Cador ◽

Boris Le Guennic ◽

Fabrice Pointillart

Keyword(s):

Magnetic Field ◽

Single Molecule ◽

Magnetic Behaviour ◽

Light Irradiation ◽

Redox Processes ◽

Single Molecule Magnets ◽

Magnetic Switching

The present work reviews switching of single-molecule magnetic behaviour achieved through various stimuli such as temperature, light irradiation, redox processes, solvation/desolvation, and magnetic field.

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Pressure tunablity in ReX4based SMMs; A magnetostructural study

Acta Crystallographica Section A Foundations and Advances ◽

10.1107/s2053273314090962 ◽

2014 ◽

Vol 70 (a1) ◽

pp. C903-C903

Author(s):

Christopher Woodall ◽

Francisco Jose Martinez Lillo ◽

Martin Míšek ◽

Alessandro Prescimone ◽

Dave Allan ◽

...

Keyword(s):

High Pressure ◽

Magnetic Susceptibility ◽

Hydrostatic Pressure ◽

Single Molecule ◽

High Hydrostatic Pressure ◽

Magnetic Behaviour ◽

Magnetic Interactions ◽

Antiferromagnetic Coupling ◽

X Ray Diffraction ◽

Single Molecule Magnets

Since the discovery of Single-Molecule Magnets (SMMs) in 1993 there has been extensive interest in understanding, developing and tuning the nature of magnetic interactions within SMMs with the intention of gaining greater insight into the nature of these interactions.[1] Typically this is done synthetically using variations in ligand geometry and co-ordination environment to vary magnetic behaviour. More recently it has been demonstrated that high hydrostatic pressure are also an effective mechanism for "tuning" properties such as magnetic susceptibility in a variety of SMMs.[2] The number of studies utilising high hydrostatic pressure to investigate molecular magnetism is extremely limited due to their inherent difficulty however we report a new study investigating the pressure tunabilty of Re(IV) based SMMs. 4d and 5d metal ions such as Re are of interest due their enhanced magnetic exchanges relative to their 3d analogues and Re(IV) based complexes are of particular interest. Previous studies into [ReX6]2-(X = Cl, Br and I) anions demonstrate significant antiferromagnetic coupling, not transmitted through chemical interactions but rather through weak Re-X...X interactions in the solid state which may be easily perturbed at high pressure. [3] Therefore we report an investigation into the tunability of magnetic susceptibility in a variety of [ReX4] based compounds using high pressure magnetic susceptibility measurements and correlate the results with structure observations taken from high pressure single crystal X-ray diffraction experiments. The effects of the removal of solvent trapped in the lattice using temperature and vacuum and the corresponding effect on magnetic behaviour and chemical structure are also reported.

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Bis-phenoxido and bis-acetato bridged heteronuclear {CoIIIDyIII} single molecule magnets with two slow relaxation branches

Dalton Transactions ◽

10.1039/c6dt00848h ◽

2016 ◽

Vol 45 (17) ◽

pp. 7510-7520 ◽

Cited By ~ 29

Author(s):

Susanta Hazra ◽

Ján Titiš ◽

Dušan Valigura ◽

Roman Boča ◽

Sasankasekhar Mohanta

Keyword(s):

Schiff Base ◽

Crystal Structures ◽

Single Molecule ◽

Magnetic Behaviour ◽

Slow Relaxation ◽

Single Molecule Magnets

Crystal structures and single molecule magnetic behaviour of two bis(μ-phenoxido)–bis(μ-acetato) {CoIIIDyIII} complexes, derived from the hexadentate Schiff base N,N′-ethylenebis(3-ethoxy- or 3-methoxysalicylaldimine), are described.

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