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研究论文

苯甲醛在离子液体中的电化学行为

  • 赵宁 ,
  • 董文举
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  • 河南师范大学化学与环境科学学院河南省环境污染控制重点实验室,河南师范大学化学与环境科学学院河南省环境污染控制重点实验室,河南师范大学化学与环境科学学院河南省环境污染控制重点实验室 河南新乡453007,河南新乡453007,河南新乡453007

收稿日期: 2006-02-28

  修回日期: 2006-02-28

  网络出版日期: 2006-02-28

Electrochemical Reduction Behavior of Benzaldehyde in the Ionic Liquids

  • ZHAO Ning ,
  • DONG Wen-ju~
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  • (*),SHI Qi-zeng(College of Chemistry and Environmental Sciences,Henan Normal University,Henan Key Laboratory for Environmental Pollution Control,Xinxiang 453007,Henan,China

Received date: 2006-02-28

  Revised date: 2006-02-28

  Online published: 2006-02-28

摘要

应用线性扫描循环伏安法、方波循环伏安法和计时电量法测定苯甲醛在3种离子液体C4M IMBF4、C6M IMBF4和C8M IMBF4中的电化学行为.实验表明,在C4M IIVIBF4离子液体中苯甲醛于GC电极上的还原包含两个连续、不可逆单电子过程,对应的方波I~E曲线峰电位Ep为-1.39 V和-1.69 V,估算的扩散系数分别为D1=1.5×10-8cm2/s和D2=1.3×10-8cm2/s.而在C6M IMBF4和C8M IMBF4离子液体中,则苯甲醛于GC电极仅显示一个电流峰,这可能是因为C4M IMBF4的碱性较C6M IMBF4和C8M IMBF4弱的缘故;而电流的衰减时间亦依C4M IMBF4,C6M IMBF4,C8M IMBF4,次序增长,并会导致更慢的异相动力学过程.

本文引用格式

赵宁 , 董文举 . 苯甲醛在离子液体中的电化学行为[J]. 电化学, 2006 , 12(1) : 80 -84 . DOI: 10.61558/2993-074X.1703

Abstract

In this paper,the electrochemical reduction of benzaldehyde was investigated in C_4MIMBF_(4)、(C_(6)MIMBF_(4)) and C_(8)MIMBF_(4) ionic liquids by cyclic linear sweep voltammetry,cyclic square-wave voltammetry and chronocoulometry.Benzaldehyde exhibits two successive one-electron irreversible reduction(E_(P1)=-1.39 V,E_(P2)=1.69 V) with GC electrode in C_(4)MIMBF_(4),the voltammetric data for benzaldehyde give diffusion coefficients of 1.5 10~(-8)cm~(2)/s and 1.3 10~(8)cm~2/s.There is one current peak in C_(6)MIMBF_(4)and C_8MIMBF_4 ionic liquids due to their stronger alkalinity then C_4MIMBF_4.The decay time of the charging current became longer in C_(4)MIMBF_(4)、C_(6)MIMBF_(4)、C_(8)MIMBF_(4),and slower heterogeneous kinetics in(C_(6)MIMBF_(4)) and C_(8)MIMBF_(4) ionic liquids.

参考文献

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