title: A 4-mm probe for (13)C CP/MAS NMR of solids at 21.15 T.
abstract: The design of a broadband 4-mm magic-angle spinning (MAS) X-(1)H/(19)F double resonance probe for cross-polarization (CP)/MAS NMR studies at 21.15 T ((1)H at 900 MHz) is described. The high-frequency (1)H/(19)F channel employs a new and efficient transmission line tuning design. The first (13)C CP/MAS NMR spectra recorded at 21.15 T have been obtained with this probe and exhibit the best S/N per milligram sample of hexamethylbenzene achieved so far for a 4-mm rotor.
authors.affiliation: Instrument Centre for Solid State NMR Spectroscopy, Department of Chemistry, University of Aarhus, DK-8000 Aarhus C, Denmark. hja@chem.au.dk
authors.forename: H J
authors.initials: HJ
authors.lastname: Jakobsen
authors.forename: P
authors.initials: P
authors.lastname: Daugaard
authors.forename: E
authors.initials: E
authors.lastname: Hald
authors.forename: D
authors.initials: D
authors.lastname: Rice
authors.forename: E
authors.initials: E
authors.lastname: Kupce
authors.forename: P D
authors.initials: PD
authors.lastname: Ellis
mesh_terms: D001555:Benzene Derivatives / Q000737:chemistry; D004867:Equipment Design; D009682:Magnetic Resonance Spectroscopy / Q000295:instrumentation* / Q000379:methods
chemical_list: D001555:Benzene Derivatives; C091695:hexamethylbenzene