Figure 5
From: Generating and sustaining long-lived spin states in 15N,15N′-azobenzene
Comparison of the thermal (a) and LLS-derived (b) 15N-NMR spectra of trans-ABZ at B0 = 16.4 T. The LLS-derived signal is stronger than the thermal signal, because the singlet order was created on the 1H channel. Asterisks show the enhanced outer singlet-triplet transitions52. (c) Adjustment of the spin-locking scheme. Here we compare the NMR spectra coming from the long-lived spin order obtained with the singlet maintenance time of τ = 400 s. For M → S and S → M conversion we used adSLIC pulses: M → S was performed on the 1H channel and S → M was performed on the 15N channel. Here \({{\nu }}_{{i}}^{{sl}}\) is the strength of the spin-locking field on the corresponding channel.
