Journal of Spectroscopy / 2017 / Article / Tab 3

Review Article

Structural Characterization of Lignin and Its Degradation Products with Spectroscopic Methods

Table 3

Assignments of signals in 1H NMR spectrum to typical functional groups in lignin (in CD3Cl) [25, 31].

Chemical shift/ppmAssignments

9.7–9.9Cinamaldehydes and benzaldehydes
6.7–7.1Aromatic-H in guaiacyl
6.2–6.7Aromatic-H in syringyl
5.8–6.2Benzylic OH in β-O-4 and β-1
4.9–5.1Carbohydrates
3.3-4.0Methoxyl
3.0–3.1Hβ in β-1
2.2–2.4Phenolic OH
1.6–2.2Aliphatic OH

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