Journal of Spectroscopy / 2017 / Article / Tab 1

Review Article

Structural Characterization of Lignin and Its Degradation Products with Spectroscopic Methods

Table 1

UV spectroscopic absorptions of typical structures in lignin [25, 30, 50, 5356].

Absorption maxima/nmElectronic transition styleChromophores and structures

200π-πConjugated bonds/aromatic ring
240n-πFree -OH
282π-πConjugated bonds/aromatic ring
320π-πAromatic ring conjugated bond with C = C
320n-πC = O groups conjugated to aromatic ring
325n-πEtherified ferulic acid

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