title: Heteronuclear decoupling interference during symmetry-based homonuclear recoupling in solid-state NMR.
abstract: We examine the influence of continuous-wave heteronuclear decoupling on symmetry-based double-quantum homonuclear dipolar recoupling, using experimental measurements, numerical simulations, and average Hamiltonian theory. There are two distinct regimes in which the heteronuclear interference effects are minimized. The first regime utilizes a moderate homonuclear recoupling field and a strong heteronuclear decoupling field; the second regime utilizes a strong homonuclear recoupling field and a weak or absent heteronuclear decoupling field. The second regime is experimentally accessible at moderate or high magic-angle-spinning frequencies and is particularly relevant for many realistic applications of solid-state NMR recoupling experiments to organic or biological materials.
authors.affiliation: School of Chemistry, University of Southampton, Southampton SO17 1BJ, UK.
authors.forename: Ildefonso
authors.initials: I
authors.lastname: Marin-Montesinos
authors.forename: Darren H
authors.initials: DH
authors.lastname: Brouwer
authors.forename: Giancarlo
authors.initials: G
authors.lastname: Antonioli
authors.forename: Wai Cheu
authors.initials: WC
authors.lastname: Lai
authors.forename: Andreas
authors.initials: A
authors.lastname: Brinkmann
authors.forename: Malcolm H
authors.initials: MH
authors.lastname: Levitt
mesh_terms: D000409:Alanine / Q000737:chemistry*; D002247:Carbon Isotopes; D005650:Fumarates / Q000737:chemistry*; D005998:Glycine / Q000737:chemistry*; D015394:Molecular Structure; D009587:Nitrogen Isotopes; D019906:Nuclear Magnetic Resonance, Biomolecular / Q000379:methods*
chemical_list: D002247:Carbon Isotopes; D005650:Fumarates; D009587:Nitrogen Isotopes; C032005:fumaric acid; D000409:Alanine; D005998:Glycine