Probing decoherence in molecular 4f qubits.

We probe herein the fundamental factors that induce decoherence in ensembles of molecular magnetic materials. This is done by pulse Electron Paramagnetic Resonance measurements at X-band (∼9.6 GHz) on single crystals of Gd@Y(trensal) at 0.

Electron Paramagnetic Resonance Spectra of Pentagonal Bipyramidal Gadolinium Complexes.

Gadolinium is a special case in spectroscopy because of the near isotropic nature of the 4f configuration of the +3 oxidation state. Gd complexes have been studied in several symmetries to understand the underlying mechanisms of the ground state splitting. The abundance of information in Gd spectra can be used as a probe for properties of the other rare earth ions in the same complexes.

Dimerized -Semiquinone Radical Anions Stabilized by a Pair of Rare-Earth Metal Ions.

Here we report stable -quinone-radical-bridged rare-earth complexes involving the ligand tetramethylquinone (QMe). The complexes, {Y[(QMe)Cl(THF)]} () and {Gd[(QMe)Cl(THF)]} (), where THF = tetrahydrofuran, are sufficiently stable that we can measure the single-crystal structures and perform magnetic and electron paramagnetic resonance measurements. These studies show the presence of a semiquinone form and that the magnetic interaction between the radicals in the dimer is strong and antiferromagnetic.

Importance of Axial Symmetry in Elucidating Lanthanide-Transition Metal Interactions.

In this paper, we experimentally study and model the electron donating character of an axial diamagnetic Pd ion in four metalloligated lanthanide complexes of formula [PPh][Ln{Pd(SAc)}] (SAc = thioacetate, Ln = Tb, Dy, Ho, and Er). A global model encompassing inelastic neutron scattering, torque magnetometry, and dc magnetometry allows to precisely determine the energy level structure of the complexes. Solid state nuclear magnetic resonance reveals a less donating character of Pd compared to the previously reported isostructural Pt-based complexes.