Comparison of the Nuclear Spin Relaxation in Magnetic Cu(II) and Nonmagnetic Ni(II)-(bis)oxamato Complexes

The electronic system of molecular-based magnets is promising for use in quantum computing devices. Magnetic resonance techniques are used for magnetization manipulation and coherence tracking. The complexes [n-Bu₄N]₂[Cu(opba)] and [n-Bu₄N]₂[Ni(opba)] have been studied by ¹H NMR technique using different pulse protocols. It is shown that the interpulse delay shift and phase cycling approaches are applicable in ¹H NMR, but it’s not as efficient as they are in EPR. Since many nuclei positions completely suppress the unwanted echo contribution, the subensembles including the longitudinal magnetization evolution should be considered.