Oligomeric fragments distribution, structure and functionalities upon ruthenium-catalyzed technical lignin depolymerization

Kozmelj, Tina Ročnik; Bartolomei, Erika; Dufour, Anthony; Leclerc, Sebastien; Arnoux, Philippe; Likozar, Blaž; Jasiukaitytė-Grojzdek, Edita; Grilc, Miha; Le Brech, Yann

doi:10.1016/j.biombioe.2024.107056

Biomass and Bioenergy

2024

DOI: 10.1016/j.biombioe.2024.107056

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Oligomeric fragments distribution, structure and functionalities upon ruthenium-catalyzed technical lignin depolymerization

Tina Ročnik Kozmelj,

Erika Bartolomei,

Anthony Dufour

et al.

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Lignin Structural Characterization and Its Antioxidant Potential: A Comparative Evaluation by EPR, UV-Vis Spectroscopy, and DPPH Assays

Kozmelj,

Voinov,

Grilc

et al. 2024

IJMS

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The natural aromatic polymer lignin and its lignin-like oligomeric fragments have attracted attention for their antioxidant capacity and free radical scavenging activities. In this study, a 2,2-diphenyl-1-picrylhydrazyl (DPPH) assay was employed to assess the antioxidant capacity of fractionated and partially depolymerized organosolv lignin by electron paramagnetic resonance (EPR) and UV-Vis spectroscopy. The results show significant antioxidant activity for both the lignin and oligomeric fragments, with the EPR measurements demonstrating their efficiency in quenching the free radicals. The EPR data were analyzed to derive the kinetic rate constants. The radical scavenging activity (RSA) of lignins was then determined by UV-Vis spectroscopy and the results were compared with the EPR method. This two-method approach improves the reliability and understanding of the antioxidant potential of lignin and its derivatives and provides valuable insights for their potential applications in various industries, including pharmaceuticals, food preservation, and cosmetics.

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Lignin Structural Characterization and Its Antioxidant Potential: A Comparative Evaluation by EPR, UV-Vis Spectroscopy, and DPPH Assays

Kozmelj,

Voinov,

Grilc

et al. 2024

IJMS

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show abstract

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Oligomeric fragments distribution, structure and functionalities upon ruthenium-catalyzed technical lignin depolymerization

Cited by 1 publication

References 71 publications

Lignin Structural Characterization and Its Antioxidant Potential: A Comparative Evaluation by EPR, UV-Vis Spectroscopy, and DPPH Assays

Lignin Structural Characterization and Its Antioxidant Potential: A Comparative Evaluation by EPR, UV-Vis Spectroscopy, and DPPH Assays

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