Figure 4.

Evaluation of a series of VS₆ qubits. (a) Molecular structures of the complexes as they appear in the crystal structures of 1–4. Green, yellow, red, and gray spheres represent vanadium, sulfur, oxygen, and carbon atoms, respectively. (b) Nutations for 1–4 that verify quantum control in each member of the series. Data were recorded in 1:1 DMF/Tol at 20 K, and 14 dB attenuation of B₁. The spin-flip operation time of 52 ns is highlighted. (c) Temperature dependences of T₂ for 1–4 in 1:1 DMF/Tol are nearly indistinguishable.