Regulation of magnetic relaxation behavior by replacing 3d transition metal ions in [M₂Dy₂] complexes containing two different organic chelating ligands

Abstract

Two [MIII2DyIII2] complexes (M = Fe for 1 and Co for 2) with mixed organic ligands were obtained. Complex 2 exhibits single molecule magnet behavior with Ueff = 64.0(9) K.

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

“…Interestingly, the structural topologies of the obtained complexes were indeed modulated by using one multidentate chelating ligand as the main ligands reacting with different auxiliary noncarboxylate organic ligands. For example, a Co 2 Dy 2 complex with a nearly linear topology was obtained when N 1, N 3-bis­(3-methoxysalicylidene)­diethylenetriamine and 2,6-pyridinedimethanol (pdmH 2 ) reacted with Co­(CH 3 CO 2 ) 2 ·6H 2 O and Dy­(NO 3 ) 3 ·5H 2 O. However, when pdmH 2 and Co­(CH 3 CO 2 ) 2 ·6H 2 O were replaced by anhydrous FeCl 3 and triethanolamine (teaH 3 ), a Fe 2 Dy 2 complex with a “ Z ” structural topology was obtained.…”

Modulating the structural topologies from star-shape to cross-shape for Co–Dy heterometallic complexes with slow magnetic relaxation behavior

“…Therefore, novel Co–Dy complexes containing mixed organic ligands can be obtained when H 3 L and dpk are employed, because the coordination atoms with different hardness can simultaneously coordinate with Co II/III and Dy III . 29…”

Pentagram-type Ln15 (Ln = Dy, Tb, Eu, Sm, Ho) clusters with different anion templates: magnetic and luminescence properties

“…S7b †). 43 Luminescence properties of 2 and 3 At room temperature, the solid-state excitation and emission spectra of 2 and 3 were observed (Fig. S4 †).…”

“…36,38 In addition, owing to the significant intrinsic magnetic anisotropy of Ln 3+ ions, 4f-based clusters have aroused attention from the area of molecular magnets. Dy(III)-based clusters with outstanding and notable single-molecule magnet (SMM) properties [39][40][41][42][43][44] were subjected to a lot of research efforts. The Tong group and Tang group have made groundbreaking contributions to the design and construction of lanthanide clusters with SMMs.…”