Transfer of phase coherence by the dipolar field in total correlation liquid state nuclear magnetic resonance spectroscopy

In this work, it is shown that radio-frequency pulse trains designed for total correlation nuclear magnetic resonance spectroscopy can mediate inter-molecular transfer of phase coherence from one spin species to another by the dipolar field. In contrast to previous studies (where short pulses interleaved with long free precession delays were used), here the transverse component of the dipolar field plays an important role. The transfer is so efficient that signal intensities close to those of a single pulse experiment can be achieved. The results are rationalized by numerical simulations that take into account relaxation and diffusion. Published under an exclusive license by AIP Publishing.