NMR Studies of Lignins. 4. Investigation of Spruce Lignin by 1H NMR Spectroscopy.
- 1 January 1980
- journal article
- research article
- Published by Danish Chemical Society in Acta Chemica Scandinavica
- Vol. 34b (1) , 21-26
- https://doi.org/10.3891/acta.chem.scand.34b-0021
Abstract
The structure of milled wood lignin from spruce (Picea abies) was investigated by 1H NMR spectroscopy, using a 270 MHz instrument. New evidence for the presence of .beta.-O-4 structures (erythro and threo forms) as major constituents of the lignin is presented. Spectral characteristics which could be attributed to .beta.-5 and divanillyltetrahydrofuran structures have been investigated. At most, a few percent of the lignin units are involved in pinoresinol structures. Signals from different types of hydroxyl, formyl and aromatic groups were analyzed.This publication has 1 reference indexed in Scilit:
- NMR Studies of Lignins. 2. Interpretation of the 1H NMR Spectrum of Acetylated Birch Lignin.Acta Chemica Scandinavica, 1979