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[求助]
請教纖維素產(chǎn)物紅外圖譜
藍(lán)色為純微晶纖維素的紅外
紅色的純微晶纖維素?zé)峤夂蟮奶峒儺a(chǎn)物,類似于左旋葡聚糖,但具體成分不祥,
現(xiàn)在想用紅外看看他的結(jié)構(gòu),但多紅外不懂,想請知道的同學(xué)幫忙看看紅色譜圖中800~1720之間的峰代表什么 ?
附件我文章的說明:The chemical structure of pyrolytic cellulose and cellulose was analyzed using FTIR. The infrared spectra are presented in Fig. 4. They were both characterized with dominant O-H stretching (3200-3500 cm-1) and C-H stretching (2850-3000 cm-1) corresponding to the aliphatic moieties. For cellulose, the O-H bending vibration frequencies at 1640 cm-1 demonstrated that the sample combined micro amount of water. The strong absorption peak at 1059 cm-1 should be the stretching vibration of C-O bond in cellulose, as well as the C-O bond in hemiacetal of pyranose [16, 17]. Compared with cellulose, the peaks at 2921 cm-1 and 2852 cm-1 indicated that there were paraffin waxes or its derivatives in the pyrolytic celluclose. The peaks at 1704 and 1621 cm-1 were C=O and C=C stretching, respectively, which resulted from the removal of water from cellulose by pyrolysis. It agreed well with the Py-GC/MS results which contained a large amount of paraffin waxes, ketones, carboxylic acids, and alkenes. C=C-H bending vibration in plane was at 800 cm-1. The stretching vibrations of C-O bond (1059 cm-1) and the typical values of β-D-glucoside (897 cm-1) were weaken.
附件文章為人家的論文![]()
[ Last edited by 020302087 on 2012-3-19 at 13:16 ] |
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- 附件 1 : 蘋果多糖的分離純化及其自由基消除活性與紅外光譜分析.kdh
2012-03-19 13:16:03, 2.56 M
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