Faculty of Agriculture, Shimane University
ISSN:0370-940X
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Bulletin of the Faculty of Agriculture, Shimane University 2
1968-12-15 発行
固体有機酸およびアルカリ・リグニン官能基の赤外スペクトルによる定量と反応性の追跡(第2報)
Reactivity of the Functional Groups in the Solid Organic Acids and the Alkali-Lignins traced by the Infrared Spectrographic Method(Part II)
Fukuwatari, Shichiro
Nishikori, Isamu
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Description
The researches on the reactivity of the functional groups of several solid organic acids has been continued.
(1) As the monomers of the lignin carboxylic acids, the vanillic acid and the hydrocinnamic acid were investigated by the infra-red spectrometric method.
(2) The shift waves and intensity decrements of the absorption bands of β-alkali lignin near 1710 <cm>^<-1>, when neutralized with sodium hydroxide solution, were qualitatively and quantitatively considered comparing with those of the cinnamic acid and the ferulic acid. Then it was confirmed that these absorption bands showed the existence of the carboxylic acids contained in these lignins.
(3) The neutralizations of the β-alkali lignin carbxylic acids gave more imformations concerning the IR spectra than those of the alkali lignin reported previously.
(4) The curves of the neutralization of the β-alkali lignin was matched with that of the cinnamic acid, but not with the ferulic acid. These tendencies were quite same with the results of the alkalilignins reported in the previous paper(1).
(1) As the monomers of the lignin carboxylic acids, the vanillic acid and the hydrocinnamic acid were investigated by the infra-red spectrometric method.
(2) The shift waves and intensity decrements of the absorption bands of β-alkali lignin near 1710 <cm>^<-1>, when neutralized with sodium hydroxide solution, were qualitatively and quantitatively considered comparing with those of the cinnamic acid and the ferulic acid. Then it was confirmed that these absorption bands showed the existence of the carboxylic acids contained in these lignins.
(3) The neutralizations of the β-alkali lignin carbxylic acids gave more imformations concerning the IR spectra than those of the alkali lignin reported previously.
(4) The curves of the neutralization of the β-alkali lignin was matched with that of the cinnamic acid, but not with the ferulic acid. These tendencies were quite same with the results of the alkalilignins reported in the previous paper(1).
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