• Title/Summary/Keyword: Diarylpropane

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Chemical Structures of Lignin by Infrared Spectroscopy - Assignment of Infrared Absorption Bands in Lignin Compounds - (IR Spectra에 의(依)한 리그닌의 화학구조(化學構造) - 단(單), 삼량체(三量體) 리그닌화합물(化合物)의 흡수대귀속(吸收帶歸屬) -)

  • Hwang, Byung-Ho
    • Journal of the Korean Wood Science and Technology
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    • v.11 no.3
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    • pp.58-69
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    • 1983

  • This research is performed to compare lignin compounds isolated in Pinus koraiensis Sieb et Zucco, with those compounds which have been already isolated. and to elucidate IR spectra of functional groups and aromatic nucleus for chemical structure of lignin. In vanillin and dehydrodivanillin having carbonyl group ill ${\alpha}$-position. characteristic absorption band of carbonyl group was confirmed in 1665 $cm^{-1}$. Absorption band of vanillic and syringic acid with carboxyl group were indicated in 1675 and 1690 $cm^{-1}$ respectively. Syringic acid showed low wave number because this was affected by methoxyl group. Characteristic absorption bands of guaiacyl, syringly and guaiacyl-syringyl co-polymer nucleus were clearly disclosed in diarylpropane compounds. It were reconfirmed that absorption band of guaiacyl showed longer wave number than of syringly nucleus.

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