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Authors
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Sibanda, N.; Lederer, A.; Brand, D. J.; Pasch, H.; Pfukwa, H.
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Title
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Exploring alkali lignin valorization via mild depolymerization using DMSO-HBr and multidimensional product analysis
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Date
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13.09.2025
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Number
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0
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Abstract
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The exploration of lignin as a source of aromatic chemicals is an intriguing challenge due to its complex and irregular structure. Developing new lignin depolymerization protocols opens pathways to value-added, well-defined aromatic compounds. However, this also induces the need for a more detailed and systematic characterization of the complex lignin product mixture. In this study, we present an alternative mild oxidative depolymerization protocol, using a simple experimental setup. This method yields a complex mixture of high-value monomeric and oligomeric aromatic compounds. The depolymerization reaction mechanism is precisely investigated using advanced analysis. The composition of the monomeric degradation products is qualitatively determined using gas chromatography-mass spectrometry (GC-MS), and the link between the oxidation products and the parent alkali lignin (AL) is established. A representative crude depolymerization product is fractionated by vacuum distillation, the respective fractions are analyzed by 13C NMR, and the obtained monomeric compounds are quantified by high-performance liquid chromatography coupled to mass spectrometry (HPLC-MS).
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Publisher
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Wiley
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Wikidata
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Citation
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Macromolecular Chemistry and Physics 226 (2025) e00268
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DOI
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https://doi.org/10.1002/macp.202500268
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Tags
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