Infrared and Raman spectra of lignin substructures:  Dibenzodioxocin

  • Authors: Bock, Peter; Nousiainen, Paula; Elder, Thomas
  • Publication Year: 2020
  • Publication Series: Scientific Journal (JRNL)
  • Source: Journal of Raman Spectroscopy
  • DOI: 10.1002/jrs.5808


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.

  • Citation: Peter Bock,  Paula Nousiainen, Thomas Elder, Markus Blaukopf, Hassan Amer, Ronald Zirbs, Antje Potthast, Notburga Gierlinger. 2020. Infrared and Raman spectra of lignin substructures: Dibenzodioxocin. J Raman Spectrosc. 2020;1–10.
  • Keywords: lignin, dibenzodioxocin, Raman spectroscopy, FT-IR, dehydrogenation polymer
  • Posted Date: March 2, 2020
  • Modified Date: June 17, 2020
  • Print Publications Are No Longer Available

    In an ongoing effort to be fiscally responsible, the Southern Research Station (SRS) will no longer produce and distribute hard copies of our publications. Many SRS publications are available at cost via the Government Printing Office (GPO). Electronic versions of publications may be downloaded, printed, and distributed.

    Publication Notes

    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
    • Our online publications are scanned and captured using Adobe Acrobat. During the capture process some typographical errors may occur. Please contact the SRS webmaster if you notice any errors which make this publication unusable.
    • To view this article, download the latest version of Adobe Acrobat Reader.