Single-Molecule Magnet Behavior and Magnetocaloric Effect in Ferromagnetically Coupled LnIII-NiII-NiII-LnIII(LnIII= DyIIIand GdIII) Linear Complexes

Single-Molecule Magnet Behavior and Magnetocaloric Effect in Ferromagnetically Coupled Ln-Ni-Ni-Ln (Ln = Dy and Gd) Linear Complexes†

A new type of linear tetranuclear Ln-Ni-Ni-Ln (Ln = Dy 1, Gd 2) complexes have been prepared using multidentate ligand N,N’-bis(3-methoxysalicylidene)-1,3diaminobenzene having two sets of NO and OO’ coordination pockets which can selectively accommodate Ni and Ln ions, respectively. The X-ray structure analysis reveals that the Ni ions are bridged by phenylenediimine groups forming a twelvememb...

Luminescence, magnetocaloric effect and single-molecule magnet behavior in lanthanide complexes based on a tridentate ligand derived from 8-hydroxyquinoline.

A new family of lanthanide complexes, [Ln2(hfac)4L2] (Ln = Eu (1), Gd (2), Tb (3), Dy (4), Ho (5), Er (6), Lu (7); hfac = hexafluoroacetylacetonate, HL = 2-(2′-benzothiazole)-8-hydroxyquinoline), was synthesized and characterized using single-crystal X-ray diffraction, elemental analysis (EA), thermal gravimetric analysis (TGA), powder X-ray diffraction (PXRD) and UV-vis spectra. X-ray crystall...

Single-molecule magnet behavior in 2,2’-bipyrimidine-bridged dilanthanide complexes

A series of 2,2'-bipyrimidine-bridged dinuclear lanthanide complexes with the general formula [Ln(tmhd)3]2bpm (tmhd = 2,2,6,6-tetramethyl-3,5-heptanedionate, bpm = 2,2'-bipyrimidine, Ln = Gd(III), 1; Tb(III), 2; Dy(III), 3; Ho(III), 4 and Er(III), 5) has been synthesized and characterized. Sublimation of [Tb(tmhd)3]2bpm onto a Au(111) surface leads to the formation of a homogeneous film with he...

Studies of a linear single-molecule magnet.

Reaction of the dinuclear complex [Mn2O2(bpy)4](ClO4)3 with H3cht (cis,cis-l,3,5-cyclohexanetriol) in MeCN produces the complex [Mn3(Hcht)2(bpy)4](ClO4)3.Et2O.2MeCN (1.Et2O.2MeCN). Dc magnetic susceptibility measurements reveal the existence of weak ferromagnetic exchange between the three Mn ions, leading to a spin ground state of S = 7, with D = -0.23 cm(-1). W-Band (94 GHz) EPR measurements ...

Closely - Related ZnII 2 LnIII 2 complexes ( LnIII = Gd , Yb ) with either Magnetic Refrigerant or Luminescent Single - Molecule