title: Nuclear Overhauser effect (NOE) enhancement of 11B NMR spectra of borane adducts in the solid state.
abstract: A strong 11B {1H} nuclear Overhauser effect (NOE) enhancement can be observed in solid-state 11B NMR spectra of borane adducts, yielding fractional enhancements, fI{S} = (I - I0)/I0, of the magic angle spinning (MAS) NMR signal of up to 155%. This is an interesting and unusual observation as 11B (spin I = 3/2) is a quadrupolar nucleus and the corresponding NOE is completely absent in solution. More generally, it shows that the NOE may have a wider role to play in solid-state NMR studies of dynamics than has been envisaged hitherto.
authors.affiliation: School of Chemistry and EaStCHEM, University of St Andrews, St Andrews KY16 9ST, United Kingdom.
authors.forename: Sharon E
authors.initials: SE
authors.lastname: Ashbrook
authors.forename: Nicholas G
authors.initials: NG
authors.lastname: Dowell
authors.forename: Ivan
authors.initials: I
authors.lastname: Prokes
authors.forename: Stephen
authors.initials: S
authors.lastname: Wimperis
mesh_terms: D001880:Boranes / Q000737:chemistry*; D001895:Boron / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D008956:Models, Chemical
chemical_list: D001880:Boranes; D001895:Boron