title: Towards measurement of homonuclear dipolar couplings in 1H solid-state NMR: recoupling with a rotor-synchronized decoupling scheme.
abstract: We describe a magic-angle spinning NMR experiment for (1)H-(1)H homonuclear dipole-dipole coupling estimations in organic solids. The methodology involves reintroducing dipolar interactions with rotor-synchronized homonuclear decoupling pulse sequences. Frequency-selective DANTE pulses are used to isolate a specific spin pair from a natural isotopic abundance sample. The coupling of interest, between the selected spin pair, may be extracted by a non linear least-squares fit of the experimentally observed modulation of the signal intensity to an exact analytical formula. The experiment is demonstrated on natural isotopic abundance glycine and alanine powder samples.
authors.affiliation: Aix-Marseille Univ, UMR, Equipe Spectrométries Appliquées à la Chimie Structurale, Marseille, France.
authors.forename: Giulia
authors.initials: G
authors.lastname: Mollica
authors.forename: P K
authors.initials: PK
authors.lastname: Madhu
authors.forename: Fabio
authors.initials: F
authors.lastname: Ziarelli
authors.forename: André
authors.initials: A
authors.lastname: Thévand
authors.forename: Pierre
authors.initials: P
authors.lastname: Thureau
authors.forename: Stéphane
authors.initials: S
authors.lastname: Viel
mesh_terms: D000409:Alanine / Q000737:chemistry; D005998:Glycine / Q000737:chemistry; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D011522:Protons
chemical_list: D011522:Protons; D000409:Alanine; D005998:Glycine