Journal of Spectroscopy / 2017 / Article / Tab 5

Review Article

Structural Characterization of Lignin and Its Degradation Products with Spectroscopic Methods

Table 5

Assignments of signals in 31P NMR spectrum to hydroxyl groups in lignin [29, 82].

Chemical shift/ppmStructural assignments

145.5–150.0Aliphatic -OH
136.5–144.7Phenols
140.0–144.5C5 substituted
143.5β-5
142.7Syringyl
142.34-O-5
141.25–5
139.0–140.0Guaiacyl
138.2–139.0Catechol
137.3–138.2p-Hydroxyphenyl
133.6–136.6Carboxylic acid -OH

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