Official Journal of the Japan Wood Research Society
From: The surface chemical constituent analysis of poplar fibrosis veneers during heat treatment
Resonance number | Chemical shift (ppm) | Assignments |
---|---|---|
1 | 172 | Hemicelluloses: –COO–R, CH3–COO– |
2 | 152.6 | Lignins: S-3(e), S-5(e) |
3 | 148–147 | Lignins: S-3(ne), S-5(ne), G-3(ne,e), G-4(ne,e) |
4 | 138.5–138 | Lignins: S-1(e), S-4(e), G-1(e) |
5 | 134–133 | Lignins: S-1(ne), S-4(ne), G-1(ne) |
6 | 121 | Lignin: G-6 |
7 | 114–106 | Lignins: S-2, S-6, G-5, G-6 |
8 | 104.8 | Cellulose: C-1 |
8′ | 104–101 | Hemicellulose: C-1 |
9 | 88.7 | Carbohydrates: C-4 cellulose (ordered) |
10 | 83.8 | Lignins: Cβ, Carbohydrates: C-4 cellulose (disordered) |
11 | 74.8 | Lignin: Cα, Carbohydrates: C-2, -3, -5 |
12 | 72.2 | Carbohydrates: C-2, -3, -5 |
13 | 64.7 | Carbohydrates: C-6 cellulose (ordered) |
14 | 61.6 | Lignins: Cγ, Carbohydrates: C-6 cellulose (disordered) |
15 | 55.7 | Lignin: OCH3 |
16 | 21 | Hemicellulose: CH3–COO– |