title: Application of the MAS-J-HMQC experiment to a new pair of nuclei {29Si,31P}: Si5O(PO4)6 and SiP2O7 polymorphs.
abstract: We report the results of the two-dimensional MAS-J-HMQC experiment providing scalar correlations between 29Si and 31P nuclei in solid state NMR, and we give the first evaluation of the 2JSi-O-P coupling constants (approximately 15 Hz) for a crystalline silicophosphate phase Si5O(PO4)6. The experiment is applied to the characterization of complex mixtures of SiP2O7 phases, through editing of 31P spin pairs by the heteronuclear 2JP-O-Si interaction.
authors.affiliation: Laboratoire de Chimie de la Matière Condensée, Université P. et M. Curie (Paris VI), UMR 7574, 4 place Jussieu, 75252 Paris Cedex 05, France.
authors.forename: C
authors.initials: C
authors.lastname: Coelho
authors.forename: T
authors.initials: T
authors.lastname: Azais
authors.forename: L
authors.initials: L
authors.lastname: Bonhomme-Coury
authors.forename: J
authors.initials: J
authors.lastname: Maquet
authors.forename: D
authors.initials: D
authors.lastname: Massiot
authors.forename: C
authors.initials: C
authors.lastname: Bonhomme