Magneto-structural correlations in arsenic- and selenium-ligated dysprosium single-molecule magnets

Abstract

A series of arsine-, arsenide, arsinidene and selenium-ligated dysprosium single-molecule magnets (SMMs) are described. The arsenide- and selenolate-ligated SMMs show anisotropy barriers up to 300 cm–1 upon magnetic dilution.

Supramolecular Approach for Enhancing Single‐Molecule Magnet Properties of Terbium(III)‐Phthalocyaninato Double‐Decker Complexes with Crown Moieties

“…As P QTM 2 is smaller than P QTM , QTM is effectively suppressed in coupled dimers of SMMs . In the case of 4f SMMs, with a few exceptions, through‐space magnetic dipole–dipole (MD) interactions have a significant effect on the SMM behavior . When the magnetic easy axes of the magnetic dipoles are on the same straight line, only an axial component of the MD interactions exists, which scarcely affects P QTM , making P QTM 2 small.…”

“…[9] In the case of 4f SMMs, with af ew exceptions, [10][11][12][13] through-space magnetic dipole-dipole (MD) interactions have as ignificant effect on the SMM behavior. [14][15][16][17][18][19][20][21][22][23][24][25] When the magnetic easy axes of the magnetic dipoles are on the same straight line, only an axial component of the MD interactions exists, which scarcely affects P QTM ,m aking P QTM 2 small. On the other hand, in the presence of transversal MD interactions, P QTM becomes larger,a nd hence, the magnetic relaxations are faster due to the larger off-diagonal matrix elements of the coupled ground states.…”

Open Chain Polyarsenides of the Lanthanides

“…To the best of our knowledge, only very few structurally characterized organo‐arsenide compounds with Ln−As bonds, namely Ln–AsR 2 and Ln–As( R )–Ln, are known. Recently, polynuclear Dy−As compounds were investigated in terms of their single‐molecule magnet (SMM) behaviour by Layfield et al . Also recently, we disclosed the synthesis of three new d/f polyarsenides.…”

“…[9] In contrastt ot he well-established solid-state chemistry of rare-earth arsenides, [10,11] structurally characterized molecular rare-earth arsenides are uncommon. To the best of our knowledge, only very few structurally characterizedo rgano-arsenide compounds with LnÀAs bonds, namely Ln-AsR 2 [12][13][14][15][16] and Ln-As(R)-Ln, [16,17] are known.R ecently,p olynuclear DyÀAs compounds were investigated in terms of their single-molecule magnet (SMM)b ehaviour by Layfield et al [16] Also recently,w e disclosed the synthesis of three new d/f polyarsenides.…”

Metal–Ligand Multiple Bonding in Thorium Phosphorus and Thorium Arsenic Complexes

“…With respectt ofelement chemistry, several examples of thorium andu ranium phosphinidene, phosphinidiide, arsinidene, and arsinidiide complexes featuring short actinide-phosphorus or -arsenic bonds have been reported. [34][35][36][37][38][39][40][41] The Layfield group has also isolated examples of lanthanide phosphinidiide, arsinidiide, and stibinidiide compounds, [42][43][44] whereas Kiplinger and Ozerovreportedt he first phosphinidiidewithlutetium. [45] Our group has previously published as eries of bis(phosphido) and bis(arsenido)Th IV compounds.…”