Infrared and Raman spectra of lignin substructures: Dibenzodioxocin.
FT‐IR
Raman spectroscopy
dehydrogenation
dibenzodioxocin
lignin
polymer
Journal
Journal of Raman spectroscopy : JRS
ISSN: 0377-0486
Titre abrégé: J Raman Spectrosc
Pays: England
ID NLM: 9876207
Informations de publication
Date de publication:
Mar 2020
Mar 2020
Historique:
received:
10
09
2019
revised:
18
11
2019
accepted:
21
11
2019
entrez:
28
3
2020
pubmed:
28
3
2020
medline:
28
3
2020
Statut:
ppublish
Résumé
Vibrational spectroscopy is a very suitable tool for investigating the plant cell wall in situ with almost no sample preparation. The structural information of all different constituents is contained in a single spectrum. Interpretation therefore heavily relies on reference spectra and understanding of the vibrational behavior of the components under study. For the first time, we show infrared (IR) and Raman spectra of dibenzodioxocin (DBDO), an important lignin substructure. A detailed vibrational assignment of the molecule, based on quantum chemical computations, is given in the Supporting Information; the main results are found in the paper. Furthermore, we show IR and Raman spectra of synthetic guaiacyl lignin (dehydrogenation polymer-G-DHP). Raman spectra of DBDO and G-DHP both differ with respect to the excitation wavelength and therefore reveal different features of the substructure/polymer. This study confirms the idea previously put forward that Raman at 532 nm selectively probes end groups of lignin, whereas Raman at 785 nm and IR seem to represent the majority of lignin substructures.
Identifiants
pubmed: 32214622
doi: 10.1002/jrs.5808
pii: JRS5808
pmc: PMC7079546
doi:
Types de publication
Journal Article
Langues
eng
Pagination
422-431Subventions
Organisme : Austrian Science Fund FWF
ID : Y 728
Pays : Austria
Informations de copyright
© 2020 The Authors. Journal of Raman Spectroscopy published by John Wiley & Sons Ltd.
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