Electrochemical properties of 1-vinyl-3-alkylimidazole bromide ionic liquids

LI Xiaoqian; GUAN Ping; HU Xiaoling; TANG Yimei; LIN Xiangping

doi:10.3969/j.issn.0438-1157.2013.11.036

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Electrochemical properties of 1-vinyl-3-alkylimidazole bromide ionic liquids

更新时间：2025-12-10

- Electrochemical properties of 1-vinyl-3-alkylimidazole bromide ionic liquids
- CIESC Journal Issue 11, Pages: 4153-4160(2013)
- 作者机构：
  
  西北工业大学理学院,陕西,西安,710129
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0438-1157.2013.11.036
  CLC： 657.1
- Online First：05 November 2013，
  
  Published：05 November 2013
- 稿件说明：
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LI Xiaoqian, GUAN Ping, HU Xiaoling, et al. Electrochemical properties of 1-vinyl-3-alkylimidazole bromide ionic liquids[J]. CIESC Journal, 2013, (11): 4153-4160.
DOI：

LI Xiaoqian, GUAN Ping, HU Xiaoling, et al. Electrochemical properties of 1-vinyl-3-alkylimidazole bromide ionic liquids[J]. CIESC Journal, 2013, (11): 4153-4160. DOI： 10.3969/j.issn.0438-1157.2013.11.036.

摘要

合成了溴化1-乙烯基-3-烷基咪唑([VAIM]Br)离子液体

采用FTIR、1H NMR、TG及DSC进行了表征

并系统研究了[VAIM]Br的电化学性能。结果表明:在298.15～323.15 K内

[VAIM]Br的电导率(σ)与温度符合Arrhenius方程

电导活化能随[VAIM]+上烷基链的增长而降低。分别以水、甲醇和乙醇为溶剂的[VAIM]Br溶液的电导率均随浓度的增大而显著增大

且σ(水)>σ(甲醇)>σ(乙醇)。通过电导法确定了[VAIM]Br在水、甲醇、乙醇中的临界胶束浓度

分别约为6.8×10-6、1.5×10-5、2.0×10-5 mol·L-1

表面活性优异。[VAIM]Br的电化学窗口在1.6～2.5 V

其电化学稳定性随[VAIM]+上烷基链的增长而逐渐降低。

Abstract

Ionic liquids 1-vinyl-3-alkyl imidazolium bromide([VAIM]Br)were synthesized and characterized by FTIR

1H NMR

TG and DSC

and their electrochemical properties were studied.The results indicated that the temperature dependence of conductivity(σ)obeyed Arrhenius type equation at a range from 298.15 K to 323.15 K and the activation energy for conductivity decreased with the extension of the alkyl chain of the[VAIM]+.The conductivities of[VAIM]Br solutions using water

methanol or ethanol as solvents respectively all increased remarkably with the increasing concentration of[VAIM]Br

and corresponded to σ(water)>σ(methanol)>σ(ethanol).The critical micelle concentrations of the[VAIM]Br in different solutions were confirmed by conductance method which were about 6.8×10-6 mol·L-1 in water

1.5×10-5 mol·L-1in methanol and 2.0×10-5 mol·L-1 in ethanol respectively.This showed superior surface activities of[VAIM]Br.Electrochemical window of[VAIM]Br were from 1.6 V to 2.5 V

and electrochemical stability decreased with the extension of the alkyl side chain of[VAIM]+.

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