Origin of the acetylated structures present in white birch (Betula pendula Roth) milled wood lignin
Artikel i vetenskaplig tidskrift, 2012
The occurrence and nature of acetate groups in the milled wood lignin (MWL) isolated from birch (Betula pendula Roth) has been addressed by spectroscopic (2D-NMR) and chemical degradative (derivatization followed by reductive cleavage, DFRC) methods. Considerable amounts of acetate groups were present in the MWL preparation. However, 2D-NMR analysis indicated that the lignin polymer is not extensively acetylated and that the major part of the acetate groups is attached to the xylan moieties present in the MWL preparation. Nevertheless, evidence of the presence of minor acetylation of the gamma-carbon of the lignin side chain (< 3% of both syringyl and guaiacyl lignin units) was provided by DFRC analysis.
cleavage
ether type
monomers
plants
nuclear-magnetic-resonance
acetate
2d nmr
kenaf
nmr-spectroscopy
sinapyl
dfrc method
Författare
J. Rencoret
Consejo Superior de Investigaciones Científicas (CSIC)
J. C. del Rio
Consejo Superior de Investigaciones Científicas (CSIC)
A. Gutierrez
Consejo Superior de Investigaciones Científicas (CSIC)
A. T. Martinez
Consejo Superior de Investigaciones Científicas (CSIC)
Shiming Li
Chalmers, Kemi- och bioteknik, Fysikalisk kemi
Jim Parkås
Knut Lundquist
Chalmers, Kemi- och bioteknik, Skogsindustriell kemiteknik
Wood Science and Technology
0043-7719 (ISSN) 1432-5225 (eISSN)
Vol. 46 1-3 459-471Ämneskategorier (SSIF 2011)
Pappers-, massa- och fiberteknik
DOI
10.1007/s00226-011-0417-z