Distribution of erythro and threo forms of different types of β-O-4 structures in aspen lignin by 13C NMR using the 2D INADEQUATE experiment
✍ Scribed by Michel Bardet; Danielle Robert; Knut Lundquist; Sverker von Unge
- Publisher
- John Wiley and Sons
- Year
- 1998
- Tongue
- English
- Weight
- 220 KB
- Volume
- 36
- Category
- Article
- ISSN
- 0749-1581
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✦ Synopsis
CarbonÈcarbon connectivity spectra of 13C-enriched aspen lignin recorded using the 2D INADE-QUATE experiment revealed cross peaks which can be assigned to four types of arylglycerol b-aryl ethers (b-O-4 structures) : erythro forms of arylglycerol b-syringyl ethers, threo forms of arylglycerol b-syringyl ethers, erythro forms arylglycerol b-guaiacyl ethers and threo forms of arylglycerol b-guaiacyl ethers. The intensities of the cross peaks suggest larger amounts of b-syringyl ethers than b-guaiacyl ethers. The erythro isomers dominate among the b-syringyl ethers. Erythro and threo forms of b-guaiacyl ethers are present in similar amounts.