Syntheses, crystal structures, and magnetic properties of a family of heterometallic octanuclear [Cu₆Ln₂] (Ln = Dy(iii), Tb(iii), Ho(iii), Er(iii), and Gd(iii)) complexes

Abstract

Five novel [Cu6Ln2] complexes were synthesized, wherein LnIII ions are seven-coordinate and coordinated by one triethanolamine and three di-2-pyridyl ketone ligands, without coordinated solvent molecules and small anions.

Influence of the Different Types of Auxiliary Noncarboxylate Organic Ligands on the Topologies and Magnetic Relaxation Behavior of Zn–Dy Heterometallic Single Molecule Magnets

“…In recent years, we concentrated on the regulation of the structural topologies and magnetic relaxation of the 3d-4f and polynuclear Dy complexes by employing two kinds of noncarboxylate organic ligands. , Interestingly, besides one series of Cu–Ln complexes, all of the reported complexes with mixed organic ligands show SMM behavior, and the topologies are indeed modulated by replacing auxiliary noncarboxylate organic ligands. In this work, we first selected N -3-methoxysalicylidene-2-amino-3-hydroxypyridine (H 2 L) as the main ligand and triethanolamine (teaH 3 ) as the auxiliary ligand to react with anhydrous ZnCl 2 and Dy­(NO 3 ) 3 ·5H 2 O in the mixture of CH 3 OH and DMF (Scheme ); fortunately, a novel Zn–Dy complex, [Zn 6 ­Dy 2 ­(L) 6 ­(tea) 2 ­(CH 3 OH) 2 ]·6CH 3 OH·8H 2 O ( 1 ), was obtained.…”

Syntheses, Structures, and Magnetic Properties of a Series of Heterotri-, Tetra- and Pentanuclear LnIII–CoII Compounds

“…As the ground state of the Gd(III)ion is 8 S 7/2 , the spin-orbit coupling effect is absent, and the influence of the ligand field can be neglected. As a consequence, most studies on 3 d– 4 f structures have involved Gd(III)–M(II) or Gd(III)–M(III) systems [ 15 , 16 , 17 , 18 , 19 ], with examples of the Ln(III)–Co(II) system being much less documented [ 20 ].…”

Controllable Fabrication of One-Dimensional and Two-Dimensional Compounds with Heterometallic Units: Syntheses, Crystal Structures, and Magnetic Properties

“…Unfortunately, no signal of out-of-phase component is found in a zero field, even with the presence of the Dy ion, with strong magnetic anisotropy. The lack of ac signals may be come from an intermolecular interference and/or an extremely rapid relaxation process led by a quantum-tunnelling effect from the Dy­(III) centers. − …”