Article Dans Une Revue Journal of Magnetic Resonance Année : 2016

Long-lived nuclear spin states in rapidly rotating CH 2 D groups

Résumé

Although monodeuterated methyl groups support proton long-lived states, hindering of the methyl rotation limits the singlet relaxation time. We demonstrate an experimental case in which the rapid rotation of the CH 2 D group extends the singlet lifetime but does not quench the chemical shift difference between the CH 2 D protons, induced by the chiral environment. Proton singlet order is accessed using Spin-Lock Induced Crossing (SLIC) experiments, showing that the singlet relaxation time T S is over 2 minutes, exceeding the longitudinal relaxation time T 1 by a factor of more than 10. This result shows that proton singlet states may be accessible and long-lived in rapidly rotating CH 2 D groups.

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hal-03116216 , version 1 (20-01-2021)

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Stuart J Elliott, Lynda J Brown, Jean-Nicolas Dumez, Malcolm H Levitt. Long-lived nuclear spin states in rapidly rotating CH 2 D groups. Journal of Magnetic Resonance, 2016, 272, pp.87-90. ⟨10.1016/j.jmr.2016.09.009⟩. ⟨hal-03116216⟩
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