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Degradation of Lignin by Infrared Free Electron Laser
Lignin monomers have attracted attention as functional materials for various industrial uses. However, it is challenging to obtain these monomers by degrading polymerized lignin due to the rigid ether linkage between the aromatic rings. Here, we propose a novel approach based on molecular vibrationa...
Autores principales: | , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9227113/ https://www.ncbi.nlm.nih.gov/pubmed/35745977 http://dx.doi.org/10.3390/polym14122401 |
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author | Kawasaki, Takayasu Zen, Heishun Sakai, Takeshi Sumitomo, Yoske Nogami, Kyoko Hayakawa, Ken Yaji, Toyonari Ohta, Toshiaki Nagata, Takashi Hayakawa, Yasushi |
author_facet | Kawasaki, Takayasu Zen, Heishun Sakai, Takeshi Sumitomo, Yoske Nogami, Kyoko Hayakawa, Ken Yaji, Toyonari Ohta, Toshiaki Nagata, Takashi Hayakawa, Yasushi |
author_sort | Kawasaki, Takayasu |
collection | PubMed |
description | Lignin monomers have attracted attention as functional materials for various industrial uses. However, it is challenging to obtain these monomers by degrading polymerized lignin due to the rigid ether linkage between the aromatic rings. Here, we propose a novel approach based on molecular vibrational excitation using infrared free electron laser (IR-FEL) for the degradation of lignin. The IR-FEL is an accelerator-based pico-second pulse laser, and commercially available powdered lignin was irradiated by the IR-FEL under atmospheric conditions. Synchrotron-radiation infrared microspectroscopy analysis showed that the absorption intensities at 1050 cm(−1), 1140 cm(−1), and 3400 cm(−1) were largely decreased alongside decolorization. Electrospray ionization mass chromatography analysis showed that coumaryl alcohol was more abundant and a mass peak corresponding to hydrated coniferyl alcohol was detected after irradiation at 2.9 μm (νO-H) compared to the original lignin. Interestingly, a mass peak corresponding to vanillic acid appeared after irradiation at 7.1 μm (νC=C and νC-C), which was supported by our two-dimensional nuclear magnetic resonance spectroscopy analysis. Therefore, it seems that partial depolymerization of lignin can be induced by IR-FEL irradiation in a wavelength-dependent manner. |
format | Online Article Text |
id | pubmed-9227113 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-92271132022-06-25 Degradation of Lignin by Infrared Free Electron Laser Kawasaki, Takayasu Zen, Heishun Sakai, Takeshi Sumitomo, Yoske Nogami, Kyoko Hayakawa, Ken Yaji, Toyonari Ohta, Toshiaki Nagata, Takashi Hayakawa, Yasushi Polymers (Basel) Article Lignin monomers have attracted attention as functional materials for various industrial uses. However, it is challenging to obtain these monomers by degrading polymerized lignin due to the rigid ether linkage between the aromatic rings. Here, we propose a novel approach based on molecular vibrational excitation using infrared free electron laser (IR-FEL) for the degradation of lignin. The IR-FEL is an accelerator-based pico-second pulse laser, and commercially available powdered lignin was irradiated by the IR-FEL under atmospheric conditions. Synchrotron-radiation infrared microspectroscopy analysis showed that the absorption intensities at 1050 cm(−1), 1140 cm(−1), and 3400 cm(−1) were largely decreased alongside decolorization. Electrospray ionization mass chromatography analysis showed that coumaryl alcohol was more abundant and a mass peak corresponding to hydrated coniferyl alcohol was detected after irradiation at 2.9 μm (νO-H) compared to the original lignin. Interestingly, a mass peak corresponding to vanillic acid appeared after irradiation at 7.1 μm (νC=C and νC-C), which was supported by our two-dimensional nuclear magnetic resonance spectroscopy analysis. Therefore, it seems that partial depolymerization of lignin can be induced by IR-FEL irradiation in a wavelength-dependent manner. MDPI 2022-06-14 /pmc/articles/PMC9227113/ /pubmed/35745977 http://dx.doi.org/10.3390/polym14122401 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Kawasaki, Takayasu Zen, Heishun Sakai, Takeshi Sumitomo, Yoske Nogami, Kyoko Hayakawa, Ken Yaji, Toyonari Ohta, Toshiaki Nagata, Takashi Hayakawa, Yasushi Degradation of Lignin by Infrared Free Electron Laser |
title | Degradation of Lignin by Infrared Free Electron Laser |
title_full | Degradation of Lignin by Infrared Free Electron Laser |
title_fullStr | Degradation of Lignin by Infrared Free Electron Laser |
title_full_unstemmed | Degradation of Lignin by Infrared Free Electron Laser |
title_short | Degradation of Lignin by Infrared Free Electron Laser |
title_sort | degradation of lignin by infrared free electron laser |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9227113/ https://www.ncbi.nlm.nih.gov/pubmed/35745977 http://dx.doi.org/10.3390/polym14122401 |
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