FTIR study of hydrogen bonding of stearic acid with ethanol, dimethyl sulfoxide, and acetonitrile in supercritical CO2

被引：0
作者：
Mao, C [1 ]
Lu, J [1 ]
Xu, Q [1 ]
Chen, SJ [1 ]
Ke, J [1 ]
Han, BX [1 ]
Yan, HK [1 ]
机构：
[1] Chinese Acad Sci, Inst Chem, Beijing 100080, Peoples R China
来源：
CHINESE JOURNAL OF CHEMISTRY | 1999年 / 17卷 / 03期
关键词：
green chemistry; FTIR; supercritical fluid; hydrogen bonding;
D O I：
暂无
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
FTIR spectroscopy was used to study the hydrogen bonding of stearic acid with ethanol, dimethyl sulfoxide (DMSO), and acetonitrile in supercritical CO2 at 318.15 K, and 12.5 and 16.5 MPa. The concentrations of the cosolvents range from 0-0.6 mol .L-1. The area percentage of absorption bands for hydrogen-bonded and nonhydrogen-bonded species was obtained from the IR spectra. The acid and the cosolvents can form hydrogen bond even when their concentrations are very low. At fixed solute concentration, the extent of hydrogen bonding increases with cosolvent concentration. At higher ethanol concentrations, it seems that one stearic acid molecule can hydrogen bond with more than one ethanol molecules simultaneously. It is seen that the strength of the hydrogen bond formed by the acid and the cosolvents is in the order: DMSO > ethanol > acetonitrile.
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页码：223 / 230
页数：8
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