Neodymium 1D systems: targeting new sources for field-induced slow magnetization relaxation

Abstract

Two non-isostructural homometallic 1D neodymium species displaying field-induced slow magnetization relaxations are presented together with theoretical studies. It is established that both systems are better described as organized 1D single molecule magnets (SMMs). Studies show great potential of Nd(III) ions to provide homometallic chains with slow magnetic relaxation.

Slow Magnetic Relaxation in Lanthanoid Crown Ether Complexes: Interplay of Raman and Anomalous Phonon Bottleneck Processes

“…The calculated thermal dependence of the χ M T products and magnetization curves are overall in good agreement with the experimental data (Figure ), especially for the strongly oblate ground states of 1‐Ce , 1‐Tb , and 1‐Dy , whereas some larger deviations between theory and experiment are observed for the weakly oblate ground state of 1‐Nd , for which the subtleties of the CF energy spectrum can be more difficult to describe . Problems with the electronic structure of Nd III (and in general ions with less than half‐filled 4f shells) might arise from a higher sensitivity to covalent effects, especially dynamical correlation with ligand electrons, which is absent from these calculations.…”

Vertical‐Aligned Li2S–Graphene Encapsulated within a Carbon Shell as a Free‐Standing Cathode for Lithium–Sulfur Batteries

“…The calculated thermald ependence of the c M T products and magnetization curves are overall in good agreement with the experimental data ( Figure 2), especially for the strongly oblate ground states of 1-Ce, 1-Tb,a nd 1-Dy,w hereas some larger deviations between theory and experiment are observed for the weakly oblate ground state of 1-Nd,f or which the subtleties of the CF energy spectrum can be more difficult to describe. [30] Problems with the electronic structure of Nd III (and in general ions with less than half-filled 4f shells)m ight arise from ah igher sensitivity to covalent effects, especially dynamical correlation with ligand electrons, which is absent from these calculations.D ynamical correlation is knowna lso to be crucial to better describe excited spin-orbit multiplets, which in less than half-filled 4f ions, are lower in energy andh ence more amenablet om ixingv ia the crystal field potential. This is ap roblem that should affect Ce III to al esser extent,g iven its single 4f electron.…”

Dinuclear LnIII Complexes with 9‐Anthracenecarboxylate Showing Field‐Induced SMM and Visible/NIR Luminescence

“…On the basis of previously published work, Tb III , Dy III , and Er III ions seem to be the best candidates to obtain complexes with SMM properties, because they can present large angular and magnetic moments in the ground state . The recently published review by Pointillart et al highlights the viability of Ce III , Nd III , Ho III , Tm III , and Yb III ions to also form lanthanide‐based SMMs . Moreover, recent studies have revealed that strong magnetic exchange in dinuclear 4f compounds could enhance the SMM properties suppressing the quantum tunneling of magnetization (QTM) relaxation pathway …”

“…In order to isolate discrete 4f‐metal‐ion complexes, such as dinuclear entities, a successful synthetic approach to follow is the simultaneous employment of bidentate bridging anionic groups and chelating neutral capping organic ligands. For the anionic species, carboxylate ligands have been widely used due to the ability of carboxylate groups to interact with Ln III ions , , , . On the other hand, chelating ligands could block two or three coordination sites per Ln III ion, thereby preventing potential polymerization .…”