Homochiral Dy 2 Schiff Base Complexes Based on ( R )/( S )‐Chlocyphos: Single‐Molecule Magnet Behaviours, Proton Conductivities and MCD Effects
Year: 2025
Type: article
Abstract: Comprehensive Summary Chiral proton conductive single‐molecule magnets (SMMs) are multifunctional molecular materials that can combine conductor, magnet, and chirality at the nanoscale, but there are still significant challenges to their synthesis. Herein, the hydrazone Schiff base ligand ( E )‐ N ′‐(2‐hydroxybenzylidene)‐3‐aminopyrazine‐2‐carbohydrazide (H 2 L Schiff ) and the homochiral ligands ( R )‐(+)‐chlocyphos/ ( S )‐(−)‐chlocyphos ( R ‐HL)/( S ‐HL) were chosen to assemble a pair of Dy 2 enantiomers [Dy 2 ( R ‐L) 2 (L Schiff ) 2 (DMA) 2 ]·2.5H 2 O ( R ‐ 1 ) (DMA = N , N ‐dimethylacetamide) and [Dy 2 ( S ‐L) 2 (L Schiff ) 2 (DMA) 2 ]·2.5H 2 O ( S ‐ 1 ) at room temperature. Magnetic investigation indicated that they are field‐induced SMMs, with a U eff / k value of 42.2 K at 1000 Oe, and there is ferromagnetic coupling within the molecule; these magnetic properties may be explained by the ab initio calculations. The presence of a hydrogen bonding network confers the enantiomers proton conductivities. Moreover, R ‐ 1 and S ‐ 1 show prominent magnetic circular dichroism (MCD) effects at room temperature.
Source: Chinese Journal of Chemistry
Institutions: Chinese Academy of Sciences, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Guangxi Normal University, State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Nanjing Normal University, Nanjing Tech University, State Key Laboratory of Materials-Oriented Chemical Engineering
Language: English
Field: Materials Science
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W4407551598