Boosting the mono-axial crystal field in stable high-coordinate Dy(iii) single-ion magnets by substitution of the phenoxy axial ligand

Abstract

Synthesis of air-stable and high-performance single-molecule magnets (SMMs) is challenging. Here a heptadentate pentapyridyldiamine (BPA-TPA) ligand and fine-tuned axial phenoxy ligands are used to synthesize two triangular dodecahedral Dy(III) complexes...

Structures and Single-Molecule Magnet Behavior of Dy3 and Dy4 Clusters Constructed by Different Dysprosium(III) Salts

“…For oblate Dy III −SMMs, a strong axial crystal field (CF) and weak equatorial ligand field are required to balance the electron cloud distribution. 22,23 However, for multicore systems, the magnetic coupling is complex because of the different anisotropy of central ions. Therefore, it is of great significance to analyze the relationship between structure and magnetic properties, optimize the anisotropy of single-metal ions, and synthesize ideal structural configurations to construct Dy III SMMs with high performance.…”

“…Among Ln III ions, Dy III -based SMMs demonstrate many remarkable properties. , The magnetic properties of SMMs are closely related to the electron cloud distribution of metal ions. For oblate Dy III –SMMs, a strong axial crystal field (CF) and weak equatorial ligand field are required to balance the electron cloud distribution. , However, for multicore systems, the magnetic coupling is complex because of the different anisotropy of central ions. Therefore, it is of great significance to analyze the relationship between structure and magnetic properties, optimize the anisotropy of single-metal ions, and synthesize ideal structural configurations to construct Dy III SMMs with high performance. − For the development of such SMMs, the selection of suitable ligands is important.…”