Heteronuclear proton double quantum-carbon single quantum scalar correlation in solids

Y. Jayasubba Reddy (1, 2) , Vipin Agarwal (1) , Anne Lesage (3) , Lyndon Emsley (3) , Kv Ramanathan (1)

1 IISER TVM - Indian Institute of Science Education and Research Thiruvananthapuram
2 Department of Physics [Bangalore]
3 Solid-State NMR Methods for Materials - Méthodes de RMN à l'état solide pour les matériaux

A new NMR experiment that exploits the advantages of proton double quantum (DQ) NMR through a proton DQ-carbon single quantum (SQ) correlation experiment in the solid state is proposed. Analogous to the previously proposed 2D H-1 (DQ)-C-13 refocused INEPT experiment (Webber et al., 2010), the correlation between H-1 and C-13 is achieved through scalar coupling evolution, while the double quantum coherence among protons is generated through dipolar couplings. However, the new experiment relies on C-13 transverse coherence for scalar transfer. The new experiment dubbed MAS-J-H-1 (DQ)-C-13-HMQC, is particularly suited for unlabeled molecules and can provide higher sensitivity than its INEPT counterpart. The experiment is applied to four different samples.

Mots clés: Solid state NMR; Proton double-quantum spectroscopy; Heteronuclear correlation; MAS-J-HMQC KeyWords Plus:STATE NMR-SPECTROSCOPY; NUCLEAR-MAGNETIC-RESONANCE; CARBAZOLE FUNCTIONALIZED ISOCYANIDES; ANGLE-SPINNING NMR; ROTATING SOLIDS; THROUGH-BOND; DEUTERATED PROTEINS; CORRELATION SPECTRA; MAS; RESOLUTION

Domaines: Chimie analytique

Y. Jayasubba Reddy, Vipin Agarwal, Anne Lesage, Lyndon Emsley, Kv Ramanathan. Heteronuclear proton double quantum-carbon single quantum scalar correlation in solids. Journal of Magnetic Resonance, 2014, 245, pp.31-37. ⟨10.1016/j.jmr.2014.05.004⟩. ⟨hal-01070845⟩