Nuclear Overhauser effect (NOE) enhancement of 11B NMR spectra of borane adducts in the solid state.
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.
Ashbrook
Sharon E
SE
School of Chemistry and EaStCHEM, University of St Andrews, St Andrews KY16 9ST, United Kingdom.
Dowell
Nicholas G
NG
Prokes
Ivan
I
Wimperis
Stephen
S
D001880:Boranes / Q000737:chemistry*; D001895:Boron / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D008956:Models, Chemical
D001880:Boranes; D001895:Boron