title: Three pulse recoupling and phase jump matching.
abstract: The paper describes a family of novel recoupling pulse sequences, called three pulse recoupling. These pulse sequences can be employed for both homonuclear and heteronuclear recoupling experiments and are robust to dispersion in chemical shifts and rf-inhomogeneity. These recoupling pulse sequences can be used in design of two-dimensional solid state NMR experiments that use powdered dephased antiphase coherence (γ preparation) to encode chemical shifts in the indirect dimension. Both components of this chemical shift encoded gamma-prepared states can be refocused into inphase coherence by a recoupling element. This helps to achieve sensitivity enhancement in 2D NMR experiments by quadrature detection.
authors.affiliation: School of Engineering and Applied Sciences, United States.
authors.forename: James
authors.initials: J
authors.lastname: Lin
authors.affiliation: Francis Bitter Magnet Lab, Department of Chemistry, MIT, United States.
authors.forename: R G
authors.initials: RG
authors.lastname: Griffin
authors.affiliation: Department of Chemistry, Aarhus University, Denmark.
authors.forename: Niels Chr
authors.initials: NC
authors.lastname: Nielsen
authors.affiliation: School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, United States. Electronic address: navin@hrl.harvard.edu.
authors.forename: Navin
authors.initials: N
authors.lastname: Khaneja
mesh_terms: D000409:Alanine / Q000737:chemistry; D000465:Algorithms; D003198:Computer Simulation; D005998:Glycine / Q000737:chemistry; D008279:Magnetic Resonance Imaging / Q000379:methods*; D013113:Spin Labels
chemical_list: D013113:Spin Labels; D000409:Alanine; D005998:Glycine
keywords: Gamma preparation; Hartmann–Hahn matching; MAS; Quadrature detection; Recoupling