Photophysical Properties and Single‐Molecule Magnet Behavior in Heterobimetallic 3d4 f Schiff Base Complexes. Issue 27 (18th August 2022)

• Record Type: Journal Article
• Authors: Chiboub Fellah, Fatima Zohra; Pointillart, Fabrice; Guizouarn, Thierry; Roisnel, Thierry; Dege, Necmi; Chiboub Fellah, Abdelghani; Hassaine, Ridha
• Is Part Of: European journal of inorganic chemistry. Volume 2022:Issue 27(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-08-18
• Subjects: Antenna Effect -- Lanthanide -- Luminescence properties -- Schiff base complexes -- Single-Molecule Magnet (SMM); Chemistry, Inorganic -- Periodicals; Organometallic chemistry -- Periodicals; Bioinorganic chemistry -- Periodicals; Solid state chemistry -- Periodicals; 546
• DOI: 10.1002/ejic.202200349
• Languages: English
• ISSNs: 1434-1948

Abstract

Abstract: Three new heterobimetallic Schiff base complexes of formula [(LZnCl)2 Gd(H2 O)](ZnCl4 )0.5 (2 ), [(LZn(OH))(LZnCl)Sm(H2 O)](ZnCl4 )0.5 (3 ) and [(LZnCl0.5 (OH)0.5 )(LZnCl)Dy(H2 O)](ZnCl4 )0.5 (4 ) were designed from the reaction of the metallo‐ligand ZnL (1 ) (H2 L=N, N′‐bis(3‐methoxysalicylaldiimine)‐1, 3‐propylene‐2‐ol) and lanthanide salt in a ratio 1 to 1. The crystallographic structures of 2 –4 were resolved by single crystal X‐ray diffraction. Light irradiation allowed the observation of a broad emission centered on the organic ligand which is exalted upon Zn(II) coordination. 1 is able to act as a metallo‐organic chromophore for the sensitization of the Sm(III) luminescence. Finally the Dy(III) derivative displayed Single‐Molecule Magnet (SMM) behavior with an opening of the hysteresis loop up to 5 K and a magnetic relaxation operating through Orbach, Raman and Quantum Tunneling of the Magnetization (QTM) at 0 Oe while under an applied magnetic field the QTM is efficiently cancelled. Abstract : Trinuclear complexes made from Zn(II) Schiff Base metallo‐ligand and lanthanide ions highlighted photophysical properties and Single‐Molecule Magnet behavior with magnetic bistability up to 5 K.