Synthesis of beta-O-4-type artificial lignin polymers and their analysis by NMR spectroscopy.
Takao Kishimoto, Yasumitsu Uraki, Makoto Ubukata
Index: Org. Biomol. Chem. 6(16) , 2982-7, (2008)
Full Text: HTML
Abstract
We describe the synthesis and NMR spectroscopic analysis of three artificial lignin polymers containing only the beta-O-4 substructure: syringyl-type homopolymer, p-hydroxyphenyl-type homopolymer and guaiacyl/syringyl-type heteropolymer. Using gel permeation chromatography, the weight-average degree of polymerization (DP(w)) of the three polymers was determined as 19.2, 38.6, and 13.9, respectively. The polymers were prepared based on the synthetic methodology of guaiacyl-type homopolymer, and were fully characterized using (1)H-, (13)C-, and (1)H-(13)C NMR spectroscopy of the acetylated and non-acetylated forms. The spectra of guaiacyl/syringyl-type heteropolymers were in good agreement with those of the beta-O-4 substructure of milled wood lignin obtained from the hardwood of Japanese white birch.
Related Compounds
Related Articles:
2013-01-01
[Int. J. Mol. Sci. 14 , 23420-40, (2013)]
1984-01-01
[Drug Metab. Dispos. 12(5) , 543-9, (1984)]
The reactions of trialkylaluminium with 2-hydroxybenzyl-and 2-hydroxyphenethyl alcohols. Ziemkowska W, et al.
[Main Group Met. Chem. 21(2) , 105-112, (1998)]
An IETS study of the adsorption of 1, 2-, 1, 3-and 1, 4-benzenedimethanol, 2-, 3-and 4-hydroxyphenethyl alcohol, and 2-, 3-and 4-hydroxybenzyl alcohol, on thin-film plasma-grown aluminium and magnesium oxides. Brown NMD, et al.
[Spectrochim. Acta A 48(7) , 939-951, (1992)]