A single-ion magnet building block strategy toward Dy₂single-molecule magnets with enhanced magnetic performance

Abstract

A molecular dysprosium(III) complex [Dy(DClQ)3(H2O)2] (1) was used as building unit for the construction of lanthanide SMMs, which has led to the isolation of two dinuclear Dy(III) complexes, namely [Dy2(DClQ)6(MeOH)2]...

Eight-coordinate mono- and dinuclear Dy(iii) complexes containing a rigid equatorial plane and an anisobidentate carboxylate ligand in the axial position: synthesis, structure and magnetism

“…The POLY_ANISO code has been successfully used to simulate the magnetic properties of highly anisotropic polynuclear complexes. 53,54 The magnetic exchange interactions (exchange + dipole) between Dy(III) centres were modelled by Ĥ = −( J exch + J dip )S 1z S 2z where J exch and J dip are the exchange and dipolar coupling, respectively, while S 1z and S 2z are the projection of pseudo-spin S = 1 2 of the ground state KD of Dy1 and Dy2 centres. The best fit of the experimental magnetic susceptibility and magnetization data yields J tol = −0.01 cm −1 ( J exch = 0.009 cm −1 and J dip = −0.019 cm −1 ).…”

Effect of coordinated anions on ferromagnetically coupled Dy2 zero-field single-molecule magnets

“…2,15–19 The higher the number of lanthanide ions, the less likely it is to have the same axis orientation; therefore, the SMMs containing only two lanthanide( iii ) ions are attracting more and more attention. 20–42 If a lanthanide( iii ) dinuclear SMM exhibits ferromagnetic interaction, the magnetic axis orientation of the two lanthanide( iii ) ions can be consistent, but this is a great challenging task; the reason is that the 4f electrons of different lanthanide( iii ) ions are not prone to magnetic exchange; even when the magnetic exchange occurs, it is usually a weak antiferromagnetic coupling. Notably, the ferromagnetic coupling between cations in lanthanide( iii ) SMMs may suppress the quantum tunnelling effect, which facilitates the presentation of SMM behavior in the zero field.…”

Different anion (NO3− and OAc−)-controlled construction of dysprosium clusters with different shapes

“…Lanthanide clusters with nanometer size, beautiful structural connections, and diverse functions have attracted extensive attention [1][2][3][4][5] and have been successfully applied in solid-state luminescence, [6][7][8][9] sensing, [10][11][12][13][14] molecular magnetism, [15][16][17][18][19][20][21] and bioimaging. [22][23][24] So far, ligand-controlled hydrolysis and anion-templated methods are still the first choice for the synthesis of lanthanide clusters.…”