Luminescent Er³⁺ based single molecule magnets with fluorinated alkoxide or aryloxide ligands

Abstract

We report the synthesis, structures, magnetic and luminescent properties of a series of new mono- and dinuclear Er3+ complexes derived from sterically demanding aryloxide and fluorinated alkoxide ligands: [4-tBu-2,6-(Ph2CH)2C6H2O]3Er(THF) (1),...

Dinuclear ytterbium(iii) benzamidinate complexes with bridging S32−, Se22− and Te22− ligands: synthesis, structure and magnetic properties

“…However, a recent surge in lanthanide chemistry with heavy chalcogens has not yet been exploited in molecular magnetism, although the intrinsically large magnetic anisotropy of Ln makes them enormously popular. 3,5 Among lanthanide ions, Tb( iii ), 6 Dy( iii ), 7 Ho( iii ), 8 Er( iii ), 9 Tm( iii ) 10 and Yb( iii ) 11 are known to form single-molecule magnets (SMMs). Although dysprosium complexes dominate since the ground state of Dy( iii ) is bistable irrespective of the ligand field symmetry, 7 another key component in the design of molecular magnets is often ignored which is the exchange interaction between paramagnetic centres.…”