Evaluation of the structure and acid-base properties of bulk wood by FT- Raman spectroscopy

Qing Shen, Hanna Rahiala, Jarl B. Rosenholm

Research output: Contribution to journalArticleScientificpeer-review

28 Citations (Scopus)


The structure of pine wood (Pinus silvestris L.) has been analyzed by FT-Raman spectroscopy, taking birch wood and the wood components cellulose, hemicellulose (xylan), and lignin as well as previously characterized wood resins as references. The acid-base properties of bulk pine wood were evaluated by comparing the spectra recorded before and after the treatment with various solvents. After the treatment with the probe liquids having only a Lifshitz-van der Waals (LW) component, it was found that the LW interactions in pine wood take place without changing the main structure. After treatment with Lewis acid-base active probe liquids, the spectra indicate that, e.g., the intense peak located at ~2936 cm-1 (CH2 stretch) seems to disappear, suggesting that this peak may be related to Lewis acidity. In addition, after treatment with a Lewis acid, it was found that the intense peak located at ~1657 cm-1 (C=C) is shifted, relating to Lewis basicity. With the ratio ~2936/~1657 cm-1 as a measure of the acid-base properties of bulk wood, a value of about 2.00 indicates that the bulk pine wood is largely acidic. The pH determined supports the evaluation made by FT- Raman spectroscopy.
Original languageEnglish
Pages (from-to)558-568
Number of pages11
JournalJournal of Colloid and Interface Science
Issue number2
Publication statusPublished - 1998
MoE publication typeA1 Journal article-refereed


  • Acid-base properties
  • Chemical structure
  • FT-Raman spectroscopy
  • PH measurement
  • Pine wood (Pinus silvestris L.)
  • Solvent treatment


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