A 9.2-GHz clock transition in a Lu(II) molecular spin qubit arising from a 3,467-MHz hyperfine interaction.

Spins in molecules are particularly attractive targets for next-generation quantum technologies, enabling chemically programmable qubits and potential for scale-up via self-assembly. Here we report the observation of one of the largest hyperfine interactions for a molecular system, A = 3,467 ± 50 MHz, as well as a very large associated clock transition. This is achieved through chemical control of the degree of s-orbital mixing into the spin-bearing d orbital associated with a series of spin-½ La(II) and Lu(II) complexes.

A Room-Temperature Stable Y(II) Aryloxide: Using Steric Saturation to Kinetically Stabilize Y(II) Complexes.

The utility of the bulky aryloxide ligands 2,6-Ad-4-Me-CHO (ArO) and 2,6-Ad-4--Bu-CHO (ArO; Ad = 1-adamantyl) for stabilizing the Y(II) ion is reported and compared with the results with 2,6--Bu-4-Me-CHO (Ar'O). In contrast to the reduction product obtained from reducing Y(OAr') with potassium graphite, which is only stable in solution for 60 s at room temperature, KC reduction of Y(OAr) in THF in the presence of 2.2.

Evaluating Electron-Transfer Reactivity of Complexes of Actinides in +2 and +3 Oxidation States by using EPR Spectroscopy.

The possibility that the relative reactivity of complexes of actinide metals in the +2 and +3 oxidation states could be investigated by examining reactions between An and An species of Th and U with rare-earth metal reagents that provide EPR confirmation of electron transfer reactivity has been explored. Neither Cp'' Th nor Cp'' U will reduce Cp'' La or Cp' Y (Cp'=C H SiMe , Cp''=C H (SiMe ) ). However, both [K(2.

Rare-Earth Metal(II) Aryloxides: Structure, Synthesis, and EPR Spectroscopy of [K(2.2.2-cryptand)][Sc(OC H tBu -2,6-Me-4) ].

The suitability of aryloxide ligands for stabilizing +2 oxidation states of Sc and Y has been examined and EPR evidence indicating the first O-donor complexes of Sc and Y has been obtained, as well as an X-ray crystal structure of a Sc aryloxide complex. The trivalent rare-earth metal aryloxide precursors, Ln(OAr') , 1-Ln (Ln=Sc, Y, Gd, Dy, Ho, Er; OAr'=OC H tBu -2,6-Me-4), were synthesized from the corresponding rare-earth metal trichlorides and LiOAr'⋅OEt . Reduction of THF solutions of 1-Ln with potassium graphite in the presence of 2.