Electro-oxidation of synthetic lignin with linoleic acid and co-catalyst
Abstract Linoleic acid (LA) was investigated as an electron transfer catalyst in biomimetic lignin degradation with an electrolytic mediator system (EMS). Initial attempts of electro-oxidations of synthetic lignin, guaiacyl (G)-type dehydrogenation polymer (G-DHP), with LA alone at 0.8 V and 1.8 V,...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2025-02-01
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| Series: | Journal of Wood Science |
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| Online Access: | https://doi.org/10.1186/s10086-025-02178-0 |
| _version_ | 1826586197667872768 |
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| author | Bing Xie Yuki Tobimatsu Toshiyuki Takano |
| author_facet | Bing Xie Yuki Tobimatsu Toshiyuki Takano |
| author_sort | Bing Xie |
| collection | DOAJ |
| description | Abstract Linoleic acid (LA) was investigated as an electron transfer catalyst in biomimetic lignin degradation with an electrolytic mediator system (EMS). Initial attempts of electro-oxidations of synthetic lignin, guaiacyl (G)-type dehydrogenation polymer (G-DHP), with LA alone at 0.8 V and 1.8 V, resulted in limited G-DHP conversion, suggesting that LA-mediated EMS is not effective when LA was used alone. Next, electro-oxidations of G-DHP with LA with O2-sparging as well as in the presence of co-catalysts, such as p-coumaric acid (PCA), tris(2,2′-bipyridine) iron(II) [Fe(bpy)3], and 1-hydroxybenzotriazole (HBT) were performed. The combined use of oxygen and co-catalysts appeared to be effective to promote G-DHP conversion. In particular, G-DHP conversion proceeded effectively in the electro-oxidation with LA/HBT at 0.6 V, as demonstrated by structural analysis of the electrolysis residues using nuclear magnetic resonance. HBT was also found to be a vital mediator when used alone in the present system. Overall, the combined use of oxygen and co-catalysts was essential for the EMS oxidation with LA, as reported in laccase mediator system (LMS) oxidation with LA. |
| first_indexed | 2025-03-14T16:05:43Z |
| format | Article |
| id | doaj.art-0d500c2aa86848cfa6433a23d9cd0a4a |
| institution | Directory Open Access Journal |
| issn | 1611-4663 |
| language | English |
| last_indexed | 2025-03-14T16:05:43Z |
| publishDate | 2025-02-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of Wood Science |
| spelling | doaj.art-0d500c2aa86848cfa6433a23d9cd0a4a2025-02-23T12:11:23ZengSpringerOpenJournal of Wood Science1611-46632025-02-0171111010.1186/s10086-025-02178-0Electro-oxidation of synthetic lignin with linoleic acid and co-catalystBing Xie0Yuki Tobimatsu1Toshiyuki Takano2Division of Forest and Biomaterials Science, Graduate School of Agriculture, Kyoto UniversityResearch Institute for Sustainable Humanosphere, Kyoto UniversityDivision of Forest and Biomaterials Science, Graduate School of Agriculture, Kyoto UniversityAbstract Linoleic acid (LA) was investigated as an electron transfer catalyst in biomimetic lignin degradation with an electrolytic mediator system (EMS). Initial attempts of electro-oxidations of synthetic lignin, guaiacyl (G)-type dehydrogenation polymer (G-DHP), with LA alone at 0.8 V and 1.8 V, resulted in limited G-DHP conversion, suggesting that LA-mediated EMS is not effective when LA was used alone. Next, electro-oxidations of G-DHP with LA with O2-sparging as well as in the presence of co-catalysts, such as p-coumaric acid (PCA), tris(2,2′-bipyridine) iron(II) [Fe(bpy)3], and 1-hydroxybenzotriazole (HBT) were performed. The combined use of oxygen and co-catalysts appeared to be effective to promote G-DHP conversion. In particular, G-DHP conversion proceeded effectively in the electro-oxidation with LA/HBT at 0.6 V, as demonstrated by structural analysis of the electrolysis residues using nuclear magnetic resonance. HBT was also found to be a vital mediator when used alone in the present system. Overall, the combined use of oxygen and co-catalysts was essential for the EMS oxidation with LA, as reported in laccase mediator system (LMS) oxidation with LA.https://doi.org/10.1186/s10086-025-02178-0Electrolytic mediator systemElectro-oxidationElectron transfer catalystDHPLignin |
| spellingShingle | Bing Xie Yuki Tobimatsu Toshiyuki Takano Electro-oxidation of synthetic lignin with linoleic acid and co-catalyst Journal of Wood Science Electrolytic mediator system Electro-oxidation Electron transfer catalyst DHP Lignin |
| title | Electro-oxidation of synthetic lignin with linoleic acid and co-catalyst |
| title_full | Electro-oxidation of synthetic lignin with linoleic acid and co-catalyst |
| title_fullStr | Electro-oxidation of synthetic lignin with linoleic acid and co-catalyst |
| title_full_unstemmed | Electro-oxidation of synthetic lignin with linoleic acid and co-catalyst |
| title_short | Electro-oxidation of synthetic lignin with linoleic acid and co-catalyst |
| title_sort | electro oxidation of synthetic lignin with linoleic acid and co catalyst |
| topic | Electrolytic mediator system Electro-oxidation Electron transfer catalyst DHP Lignin |
| url | https://doi.org/10.1186/s10086-025-02178-0 |
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