Official Journal of the Japan Wood Research Society
Table 2 Resonance assignment of solid-state NMR of wood and grass. Excerpted from [27, 28]
From: Weathering characteristics of bamboo (Phyllostachys puberscence) exposed to outdoors for one year
Resonance number | Chemical shift (ppm) | Assignment |
|---|---|---|
1 | 173 | Acetyl groups in hemicelluloses |
2 | 153 | S3, S5 lignin |
3 | 148 | S3, S5, G1, G4 |
4 | 135 | Etherified S and G |
5 | 116 | C3, C5 in p-hydroxyphenyl |
6 | 105 | C1 carbohydrate |
7 | 89 | C4 crystalline cellulose |
8 | 84 | C4 amorphous cellulose |
9 | 75 | Cellulose |
10 | 65 | C6 crystalline cellulose |
11 | 62 | Xylan |
12 | 56 | Methoxyl in lignin |
13 | 33 | Aliphatic carbons (=extractives) |
14 | 21 | Acetyl groups in hemicelluloses |