Influencing the properties of dysprosium single-molecule magnets with phosphorus donor ligands.

Nature communications (2015-07-02)
Thomas Pugh, Floriana Tuna, Liviu Ungur, David Collison, Eric J L McInnes, Liviu F Chibotaru, Richard A Layfield
RESUMEN

Single-molecule magnets are a type of coordination compound that can retain magnetic information at low temperatures. Single-molecule magnets based on lanthanides have accounted for many important advances, including systems with very large energy barriers to reversal of the magnetization, and a di-terbium complex that displays magnetic hysteresis up to 14 K and shows strong coercivity. Ligand design is crucial for the development of new single-molecule magnets: organometallic chemistry presents possibilities for using unconventional ligands, particularly those with soft donor groups. Here we report dysprosium single-molecule magnets with neutral and anionic phosphorus donor ligands, and show that their properties change dramatically when varying the ligand from phosphine to phosphide to phosphinidene. A phosphide-ligated, trimetallic dysprosium single-molecule magnet relaxes via the second-excited Kramers' doublet, and, when doped into a diamagnetic matrix at the single-ion level, produces a large energy barrier of 256 cm(-1) and magnetic hysteresis up to 4.4 K.

MATERIALES
Referencia del producto
Marca
Descripción del producto

Sigma-Aldrich
n-Butyllithium solution, 2.5 M in hexanes
Sigma-Aldrich
n-Butyllithium solution, 1.6 M in hexanes
Sigma-Aldrich
Lithium aluminum hydride, powder, reagent grade, 95%
Sigma-Aldrich
n-Butyllithium solution, 2.0 M in cyclohexane
Sigma-Aldrich
Lithium aluminum hydride, pellets, reagent grade, 95%
Sigma-Aldrich
2-Mesitylmagnesium bromide solution, 1.0 M in THF
Sigma-Aldrich
n-Butyllithium solution, 11.0 M in hexanes
Sigma-Aldrich
n-Butyllithium solution, 2.7 M in heptane
Sigma-Aldrich
Lithium aluminum hydride, ≥97.0% (gas-volumetric)
Sigma-Aldrich
2-Mesitylmagnesium bromide solution, 1.0 M in diethyl ether
Sigma-Aldrich
n-Butyllithium solution, 1.4 M in toluene
Sigma-Aldrich
Lithium aluminum hydride, ≥97.0% (gas-volumetric), tablet (~0.5 g each)
Sigma-Aldrich
Lithium aluminum hydride, hydrogen-storage grade

Redes sociales

LinkedIn icon
Twitter icon
Facebook Icon
Instagram Icon

Merck

Investigación. Desarrollo. Producción.

Somos un proveedor líder para la industria de Ciencias de la Vida con soluciones y servicios para investigación, desarrollo y producción biotecnológicos, y para desarrollo y producción de tratamientos farmacéuticos

© 2021 Merck KGaA, Darmstadt, Alemania y/o sus filiales. Todos los derechos reservados.

Queda estrictamente prohibida la reproducción sin permiso de cualquiera de los materiales de la página web.