title: Fast characterization of functionalized silica materials by silicon-29 surface-enhanced NMR spectroscopy using dynamic nuclear polarization.
abstract: We demonstrate fast characterization of the distribution of surface bonding modes and interactions in a series of functionalized materials via surface-enhanced nuclear magnetic resonance spectroscopy using dynamic nuclear polarization (DNP). Surface-enhanced silicon-29 DNP NMR spectra were obtained by using incipient wetness impregnation of the sample with a solution containing a polarizing radical (TOTAPOL). We identify and compare the bonding topology of functional groups in materials obtained via a sol-gel process and in materials prepared by post-grafting reactions. Furthermore, the remarkable gain in time provided by surface-enhanced silicon-29 DNP NMR spectroscopy (typically on the order of a factor 400) allows the facile acquisition of two-dimensional correlation spectra.
authors.affiliation: Centre de RMN à Très Hauts Champs, Université de Lyon (CNRS/ENS Lyon/UCB Lyon 1), 69100 Villeurbanne, France.
authors.forename: Moreno
authors.initials: M
authors.lastname: Lelli
authors.forename: David
authors.initials: D
authors.lastname: Gajan
authors.forename: Anne
authors.initials: A
authors.lastname: Lesage
authors.forename: Marc A
authors.initials: MA
authors.lastname: Caporini
authors.forename: Veronika
authors.initials: V
authors.lastname: Vitzthum
authors.forename: Pascal
authors.initials: P
authors.lastname: Miéville
authors.forename: Florent
authors.initials: F
authors.lastname: Héroguel
authors.forename: Fernando
authors.initials: F
authors.lastname: Rascón
authors.forename: Arthur
authors.initials: A
authors.lastname: Roussey
authors.forename: Chloé
authors.initials: C
authors.lastname: Thieuleux
authors.forename: Malika
authors.initials: M
authors.lastname: Boualleg
authors.forename: Laurent
authors.initials: L
authors.lastname: Veyre
authors.forename: Geoffrey
authors.initials: G
authors.lastname: Bodenhausen
authors.forename: Christophe
authors.initials: C
authors.lastname: Copéret
authors.forename: Lyndon
authors.initials: L
authors.lastname: Emsley