Strategies towards single molecule magnets based on lanthanide ions

Sessoli, Roberta; Powell, Annie K.

doi:10.1016/j.ccr.2008.12.014

Cited by 1,431 publications

(739 citation statements)

References 85 publications

Supporting

Mentioning

707

Contrasting

Unclassified

Order By: Relevance

“…Previous investigations have observed that exchange coupling can enhance SMM behavior in Ln complexes. 12,[32][33][34][35][36] Exchange coupling in Cp* 2 Yb(bipy) (3)…”

Section: Exchange Coupling In Lanthanide Single Molecule Magnets (1)mentioning

confidence: 99%

Application of the Hubbard Model to Cp*₂Yb(bipy), a Model System for Strong Exchange Coupling in Lanthanide Systems

2012

View full text Add to dashboard Cite

Exchange coupling is quantified in lanthanide (Ln) single molecule magnets (SMMs) containing a bridging N 2 3-radical ligand and between [Cp* 2 Yb] + and bipy -in Cp* 2 Yb(bipy) where Cp* is pentamethylcyclopentadienyl and bipy is 2,2'-bipyridyl. In the case of these lanthanide SMMs, the magnitude of exchange coupling between the Ln ion and the bridging N 2 3-, 2J, is very similar to the barrier to magnetic relaxation, U eff . A molecular version of the Hubbard model is applied to systems in which unpaired electrons on magnetic metal ions have direct overlap with unpaired electrons residing on ligands. The Hubbard model explicitly addresses electron correlation, which is essential for understanding the magnetic behavior of these complexes. This model is applied quantitatively to Cp* 2 Yb(bipy) to explain its very strong exchange coupling, 2J = -0.11 eV (-920 cm -1 ). The model is also used to explain the presence of strong exchange coupling in Ln SMMs in which the lanthanide spins are coupled via bridging N 2 3-radical ligands. The results suggest that increasing the magnetic coupling in lanthanide clusters could lead to an increase in the blocking temperatures of exchange-coupled lanthanide SMMs suggesting routes to the rational design of future lanthanide SMMs.

show abstract

“…Previous investigations have observed that exchange coupling can enhance SMM behavior in Ln complexes. 12,[32][33][34][35][36] Exchange coupling in Cp* 2 Yb(bipy) (3)…”

Section: Exchange Coupling In Lanthanide Single Molecule Magnets (1)mentioning

confidence: 99%

Application of the Hubbard Model to Cp*₂Yb(bipy), a Model System for Strong Exchange Coupling in Lanthanide Systems

2012

View full text Add to dashboard Cite

show abstract

“…Apart from temperature and light, chemical [25], electrical [26], or pressure [27] stimuli have also been used to induce a spin crossover. Several stimuli have been used to trigger magnetic properties changes [3] in three main areas: (i) changing the spin state of a transition metal in spin crossover (SCO) systems [4][5][6][7][8][9][10][11]; (ii) switching the exchange interaction between different spin carriers [12,13]; and (iii) switching single-molecule magnet (SMM) properties [14,15]. Spin-crossover complexes [16][17][18][19][20] are particularly interesting for such purpose, as they can exist in two stable spin states and have been largely studied.…”

Section: Introductionmentioning

confidence: 99%

Switching Magnetic Properties by a Mechanical Motion

et al. 2018

View full text Add to dashboard Cite

Switching magnetic properties have attracted a wide interest from inorganic chemist for the objectives of information storage and quantum computing at the molecular level. This review is focused on magnetic switches based on a mechanical motion, which is an innovative approach. Three main strategies to control magnetic properties by a mechanical motion have been developed in the literature and will be described. The first one (ligand-induced spin change) consists in modulating the ligand field strength by a configuration change of the ligand in spin-crossover complexes. The second one (coordination-induced spin-state switching) is based on a change in the coordination number of a metallic center that is triggered by the motion of one ligand. The third one uses the modulation of the exchange interaction between two spin-centers by a mechanical motion.

show abstract

“…Besides, if this transition occurs with hysteresis a memory effect is conferred. In very recent years there is a renaissance of SCO materials in molecular magnetism [6][7][8][9][10][11][12] because, in contrast with other bistable species such as single molecule magnets, [13,14] SCO may occur at room temperature.…”

mentioning

confidence: 99%

Enhanced Activity and Acid pH Stability of Prussian Blue-type Oxygen Evolution Electrocatalysts Processed by Chemical Etching

et al. 2016

View full text Add to dashboard Cite

The development of upscalable oxygen evolving electrocatalysts from earth-abundant metals able to operate in neutral or acidic environments and low overpotentials remains a fundamental challenge for the realization of artificial photosynthesis. In this study, we report a highly active phase of heterobimetallic cyanide-bridged electrocatalysts able to promote water oxidation under neutral, basic (pH < 13), and acidic conditions (pH > 1). Cobalt–iron Prussian blue-type thin films, formed by chemical etching of Co(OH)1.0(CO3)0.5·nH2O nanocrystals, yield a dramatic enhancement of the catalytic performance toward oxygen production, when compared with previous reports for analogous materials. Electrochemical, spectroscopic, and structural studies confirm the excellent performance, stability, and corrosion resistance, even when compared with state-of-the-art metal oxide catalysts under moderate overpotentials and in a remarkably large pH range, including acid media where most cost-effective water oxidation catalysts are not useful. The origin of the superior electrocatalytic activity toward water oxidation appears to be in the optimized interfacial matching between catalyst and electrode surface obtained through this fabrication method.

show abstract

Strategies towards single molecule magnets based on lanthanide ions

Cited by 1,431 publications

References 85 publications

Application of the Hubbard Model to Cp*₂Yb(bipy), a Model System for Strong Exchange Coupling in Lanthanide Systems

Application of the Hubbard Model to Cp*₂Yb(bipy), a Model System for Strong Exchange Coupling in Lanthanide Systems

Switching Magnetic Properties by a Mechanical Motion

Enhanced Activity and Acid pH Stability of Prussian Blue-type Oxygen Evolution Electrocatalysts Processed by Chemical Etching

Contact Info

Product

Resources

About

Strategies towards single molecule magnets based on lanthanide ions

Cited by 1,431 publications

References 85 publications

Application of the Hubbard Model to Cp*2Yb(bipy), a Model System for Strong Exchange Coupling in Lanthanide Systems

Application of the Hubbard Model to Cp*2Yb(bipy), a Model System for Strong Exchange Coupling in Lanthanide Systems

Switching Magnetic Properties by a Mechanical Motion

Enhanced Activity and Acid pH Stability of Prussian Blue-type Oxygen Evolution Electrocatalysts Processed by Chemical Etching

Contact Info

Product

Resources

About

Application of the Hubbard Model to Cp*₂Yb(bipy), a Model System for Strong Exchange Coupling in Lanthanide Systems

Application of the Hubbard Model to Cp*₂Yb(bipy), a Model System for Strong Exchange Coupling in Lanthanide Systems