A ¹³C NMR study of four lignins in the solid and solution states

Abstract

Abstract A series of four solvent‐extracted lignins were subjected to solid‐state 13 C NMR analysis using the cross polarization‐magic angle (CP/MAS) technique. Comparisons are made between the solid‐sample spectra and high‐field spectra obtained on solutions of these lignins. Specific signals in both the solid‐state and solution spectra can be assigned to structural features present in the lignins. Most of the spectral information present in the solution‐state spectra are seen by CP/MAS, a technique that shows great promise for the study of lignin in solid samples.