Coherence transfer between spy nuclei and nitrogen-14 in solids.

Simone Cavadini (1) , Anuji Abraham (1) , Geoffrey Bodenhausen (2, 3)

1 Laboratoire de Résonance Magnétique Biomoléculaire,
2 ISIC - Institut des sciences et d'ingénierie chimiques
3 UPMC - Université Pierre et Marie Curie - Paris 6

Coherence transfer from 'spy nuclei' such as (1)H or (13)C (S=1/2) was used to excite single- or double-quantum coherences of (14)N nuclei (I=1) while the S spins were aligned along the static field, in the manner of heteronuclear single-quantum correlation (HSQC) spectroscopy. For samples spinning at the magic angle, coherence transfer can be achieved through a combination of scalar couplings J(I,S) and second-order quadrupole-dipole cross-terms, also known as residual dipolar splittings (RDS). The second-order quadrupolar powder patterns in the two-dimensional spectra allow one to determine the quadrupolar parameters of (14)N in amino acids.

Domaines: Chimie organique

Simone Cavadini, Anuji Abraham, Geoffrey Bodenhausen. Coherence transfer between spy nuclei and nitrogen-14 in solids.. Journal of Magnetic Resonance, 2008, 190 ((1)), pp.160-4. ⟨10.1016/j.jmr.2007.10.008⟩. ⟨hal-00689862⟩