1,8-重氮双环（5.4.0）十一烷基-7-烯-羟基离子液体的表征。

IF 2.9 3区综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES Royal Society Open Science Pub Date : 2025-01-08 eCollection Date: 2025-01-01 DOI:10.1098/rsos.240584

Syarafana O Amat, Normawati M Yunus, Cecilia D Wilfred

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引用次数: 0

摘要

通过季铵化和离子交换两步反应，合成了6种1,8-重氮双环（5.4.0）十一-7-烯基离子液体（il），它们与乙基或丙基羟基阳离子连接，与硫氰酸盐、双氰酰胺和双striflimide阴离子结合。采用1H和13C核磁共振波谱（NMR）和傅里叶变换红外光谱（FTIR）对其进行表征。核磁共振结果证实了所有il的结构，并得到了FTIR结果的支持。测定了其热稳定性、密度和折射率等理化性质。在压降装置中研究了不同压力下阳离子链长和阴离子同一性对CO2吸收的影响。结果表明，CO2的吸附性随着压力的增加和腈基数目的增加而增加。据报道，在20 bar下，CO2的最高吸收量为0.96 mol CO2 mol-1 IL。

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Characterization of 1,8-diazabicyclo(5.4.0)undec-7-ene-hydroxyl-based ionic liquid for CO₂ capture.

Six 1,8-diazabicyclo(5.4.0)undec-7-ene-based ionic liquids (ILs) linked with ethyl or propyl hydroxyl cations, coupled with thiocyanate, dicyanamide and bistriflimide anions, were synthesized through a two-step reaction: quaternization and ion exchange. The characterization of the ILs was carried out using ¹H and ¹³C nuclear magnetic resonance spectroscopy (NMR) and Fourier-transform infrared spectroscopy (FTIR). The NMR results confirmed the structures of all the ILs, and these were supported by the FTIR results. In addition, the physicochemical properties, namely thermal stability, density and refractive index, were determined. The effects of the chain length in the cation and the identity of the anion on CO₂ absorption were studied in a pressure drop equipment at different pressures. It was found that CO₂ sorption increased with increasing pressure and the number of nitrile groups present. The highest CO₂ sorption is reported to be 0.96 mol CO₂ mol^-1 IL at 20 bar.

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来源期刊

Royal Society Open Science Multidisciplinary-Multidisciplinary

CiteScore

6.00

自引率

0.00%

发文量

508

审稿时长

14 weeks

期刊介绍： Royal Society Open Science is a new open journal publishing high-quality original research across the entire range of science on the basis of objective peer-review. The journal covers the entire range of science and mathematics and will allow the Society to publish all the high-quality work it receives without the usual restrictions on scope, length or impact.