title: Triple-quantum correlation NMR experiments in solids using J-couplings.
abstract: We show that triple-quantum-single-quantum (TQ-SQ) correlation spectra of crystalline and disordered solids can be obtained under MAS using pulse sequences based on through-bond J-couplings. The feasibility of the experiments in coupled spin-1/2 systems is demonstrated for fully 13C-labelled L-alanine and Pb3P4O13 crystalline compounds, considered as model three-spin and four-spin systems, respectively. In the case of phosphate glasses, we show that the obtained TQ-SQ correlation spectra provide an improved description of the glass forming network connectivities and of the chain length distribution in the disordered network.
authors.affiliation: Centre de Recherches sur les Matériaux à Haute Température, CNRS, 45071 Orléans cedex 2, France. fayon@cnrs-orleans.fr
authors.forename: Franck
authors.initials: F
authors.lastname: Fayon
authors.forename: Claire
authors.initials: C
authors.lastname: Roiland
authors.forename: Lyndon
authors.initials: L
authors.lastname: Emsley
authors.forename: Dominique
authors.initials: D
authors.lastname: Massiot
mesh_terms: D000409:Alanine / Q000737:chemistry*; D002247:Carbon Isotopes; D005898:Glass / Q000737:chemistry; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*
chemical_list: D002247:Carbon Isotopes; D000409:Alanine