The 2D MAS NMR spin-echo experiment: the determination of 13C-13C J couplings in a solid-state cellulose sample.
A simple 13C MAS spin-echo experiment is applied to a partially 13C-labelled cellulose sample extracted from wood. 13C-13C J couplings are determined even though considerable chemical disorder leads to observed linewidths in the normal 1D 13C CP MAS spectrum which far exceed the J couplings. The fitting of the experimental data also allows the quantification of the degree of isotopic enrichment.
Brown
Steven P
SP
Department of Physics, University of Warwick, Coventry CV4 7AL, UK. S.P.Brown@warwick.ac.uk
Emsley
Lyndon
L
D002247:Carbon Isotopes / Q000737:chemistry; D002482:Cellulose / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D014934:Wood
D002247:Carbon Isotopes; D002482:Cellulose