title: Proton-proton homonuclear dipolar decoupling in solid-state NMR using rotor-synchronized z-rotation pulse sequences.
abstract: We present a theoretical analysis of rotor-synchronized homonuclear dipolar decoupling schemes that cause a z-rotation of the spins. These pulse sequences applicable at high spinning rates (nu(r) > or = 30 kHz) yield high-resolution proton NMR spectra that are free of artifacts, such as zero lines and image peaks. We show that the scaled isotropic chemical-shift positions of proton lines can be calculated from the zero-order average Hamiltonian and that the scaling factor does not depend on offset. The effects of different adjustable parameters (rf field, spinning rate, pulse shape, offset) on the decoupling performance are analyzed by numerical simulations of proton spectra and by (1)H solid-state NMR experiments on NaH(2)PO(4) and glycine.
authors.affiliation: Unité de Catalyse et de Chimie du Solide, UMR CNRS 8181, Ecole Nationale Supérieure de Chimie de Lille, Université de Lille 1, B.P. 90108, 59652 Villeneuve d'Ascq Cedex, France. olivier.lafon@ensc-lille.fr
authors.forename: Olivier
authors.initials: O
authors.lastname: Lafon
authors.forename: Qiang
authors.initials: Q
authors.lastname: Wang
authors.forename: Bingwen
authors.initials: B
authors.lastname: Hu
authors.forename: Julien
authors.initials: J
authors.lastname: Trébosc
authors.forename: Feng
authors.initials: F
authors.lastname: Deng
authors.forename: Jean-Paul
authors.initials: JP
authors.lastname: Amoureux
mesh_terms: D003198:Computer Simulation; D005998:Glycine; D009682:Magnetic Resonance Spectroscopy / Q000295:instrumentation / Q000379:methods*; D008962:Models, Theoretical; D010710:Phosphates; D011522:Protons
chemical_list: D010710:Phosphates; D011522:Protons; C018279:sodium phosphate; D005998:Glycine