Air-stable chiral double-decker Dy(iii) macrocycles with fluoride ion as the sole axial ligand

Abstract

A pair of air-stable double-decker Dy(III) macrocyclic enantiomers featuring sole fluoride axial ligands were designed and structurally and magnetically characterized. They displayed strong intramolecular ferromagnetic coupling and two-step relaxation of...

Multifunctionality of luminescent molecular nanomagnets based on lanthanide complexes

“…94 Thus, both conditions have to be fulfilled, which can be achieved using purposefully designed ligands, usually based on expanded aromatic components, with the support of counter-ions and solvents. [84][85][86][87][89][90][91][92][95][96][97][98][99] To achieve multifunctional Ln-based molecular materials, including emissive SMMs, a particularly useful approach is based on the use of macrocycle ligands. [95][96][97][98][99] We and other groups have developed an alternative strategy that consists of using complexes of the second metal ion as metalloligands attached to the Ln ions.…”

“…[84][85][86][87][89][90][91][92][95][96][97][98][99] To achieve multifunctional Ln-based molecular materials, including emissive SMMs, a particularly useful approach is based on the use of macrocycle ligands. [95][96][97][98][99] We and other groups have developed an alternative strategy that consists of using complexes of the second metal ion as metalloligands attached to the Ln ions. 88,[100][101][102] Such a heterometallic synthetic approach to luminescent Ln(III)-based SMMs usually employs cyanido transition metal complexes as the metalloligands.…”

Theoretical Insights into the Adsorption of Rare-Earth-Containing Single-Molecule Magnets on Solid Surfaces

“…Over the past three decades, significant efforts have been devoted to exploiting the functionality of materials at the molecular level based on the stability of molecular systems. Single-molecule magnets (SMMs) − have emerged as promising candidates for information storage because of their bistable magnetic ground state. Switching between different magnetic states in SMM systems requires overcoming an energy barrier known as the magnetic anisotropy energy (MAE).…”

The importance of second sphere interactions on single molecule magnet performance

“…Effective use of sterically bulky macrocyclic ligands has been explored by Tang et al , in their quest to elucidate the relaxation mechanisms of SMMs. 55–58 These bulky ligands helped isolate the magnetic centres and reduce the CFs. With the addition of electron withdrawing substituents to the macrocycles Tang et al were able to further weaken the equatorial crystal field, dramatically increasing SMM performance.…”