Molecular Structure and Magnetic Properties of Acetato-Bridged Lanthanide(III) Dimers

Magnetic Behavior of Carboxylate and β-Diketonate Lanthanide Complexes Containing Stable Organometallic Moieties in the Core-Forming Ligand

“…Moreover, it is an isotropic ion with zero contribution from spin-orbital coupling, which considerably facilitates the mathematical description of magnetism for Gd 3+ complexes. The experimental χmT(Т) dependences for binuclear and polynuclear Gd 3+ complexes with the [Gd2O2] core are usually interpreted using equations derived from the Heisenberg-Dirac-Van Vleck Hamiltonian H = −JSGdSGd′ (J: exchange coupling constant) with isotropic spin and the quantum number SGd = SGd′ = 7/2 [27,28].…”

Lanthanide-Containing Molecular and Supramolecular Polymetallic Functional Assemblies

“…In this case, the highest temperature at which the magnetic susceptibility is maximum is expected in the case of 4f 7 (Gd(III)), 4f 5 (Sm(III)), and 4f 9 (Dy-(III)), in line with experimental data on [Ln(C 5 H 5 ) 2 -Br] 2 . 183 The magnetic behavior of Gd-Gd ( 4f 7 ) pairs is documented for several systems in which the metal ions are connected by bridging ligands, for instance, in coordination compounds, 184,185 podates 17,186 or complexes with calixarenes. 187 The examples listed in Table 2 show that the interaction is antiferromagnetic, with coupling constants J in the range -0.045 to -0.2 cm -1 , which is at least 1 to 2 orders of magnitude lower than that for Gd-Cu pairs, for instance.…”

Synthesis, Crystal Structure, and Photophysical and Magnetic Properties of Dimeric and Polymeric Lanthanide Complexes with Benzoic Acid and Its Derivatives

“…We can analyse the data quantitatively by using the equation deduced from the isotropic spin Hamiltonian, H ϭ ϪJS Gd1 S Gd2 , with the quantum numbers S Gd1 ϭ S Gd2 ϭ 7/2. Equation (1) is for the magnetic susceptibility of dimeric system [29] with x ϭ J/kT and N ϭ Avogadro's number, β ϭ Bohr magneton, k ϭ Boltzmann constant. The magnetic interaction parameter J can be evaluated by fitting the data for the dimer system with Equation (1) ).…”