A dinuclear dysprosium Schiff base complex showing slow magnetic relaxation in the absence of an external magnetic field. (10th August 2022)

• Record Type: Journal Article
• Authors: Gebrezgiabher, Mamo; Schlittenhardt, Sören; Rajnák, Cyril; Kuchár, Juraj; Sergawie, Assefa; Černák, Juraj; Ruben, Mario; Thomas, Madhu; Boča, Roman
• Is Part Of: New journal of chemistry. Volume 46:Number 35(2022)
• Page Start: 16702
• Page End: 16707
• Publication Date: 2022-08-10
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/d2nj02591d
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : A dinuclear dysprosium(iii ) complex [Dy2 (NO3 )3 (L)3 ]· n CH3 OH ( n = 1.20; HL = (2-[(2-hydroxy-propylimino)methyl]phenol)) (1 ) was isolated when dysprosium nitrate reacted with a solution of salicylaldehyde and 1-amino-2-propanol in a basic medium under in-situ reaction conditions. Abstract : A dinuclear dysprosium(iii ) complex [Dy2 (NO3 )3 (L)3 ]· n CH3 OH ( n = 1.20; HL = (2-[(2-hydroxy-propylimino)methyl]phenol)) (1 ) was isolated when dysprosium nitrate reacted with a solution of salicylaldehyde and 1-amino-2-propanol in a basic medium under in-situ reaction conditions. The isolated complex was characterized by single crystal X-ray diffraction studies at room temperature. The complex is built up of a dinuclear {Dy2 } molecule in which the two Dy(iii ) central atoms are triply linked by O-monoatomic bridges arising from deprotonated hydroxyl groups of the three L ligands; these act as doubly chelating & bridging ligands. Both Dy(iii ) atoms exhibit nona-coordination with donor sets O8 N and O7 N2, respectively. The coordination spheres of the respective Dy(iii ) atoms are completed by one or two chelating nitrato ligands. The magnetic properties of 1 have been investigated by DC and AC susceptibility measurements. The DC measurements reveal a slight exchange coupling of an antiferromagnetic nature. The out-of-phase AC susceptibility signal is seen even at zero applied field. The low-frequency relaxation mode is supported by an external magnetic field.