摘要
The electrochemical reduction of coumarin at GC electrode in 1-n-butyl-3-methylimidazolium tetrafluoroborate(BMIMBF4) room temperature ionic liquid is reported.Coumarin exhibits a one-electron,irreversible reduction to caroanion radical,and the latter species undergoes fast dimerization to dihydrodimer.The influences of scan rate, concentration and temperature were studied by cyclic voltammetry.The results show that the reaction is diffusion controlled.The diffusion coefficient D of coumarin in BMIMBF4 from Chronocoulometry is 5.066×10-7 cm2/s. Furthermore,the influences of water and substituting group during the electroreduction are discussed. These preliminary electrochemical experiments show encouraging results for the use of ionic liquids in a 'green' electrochemistry.
The electrochemical reduction of coumarin at GC electrode in 1-n-butyl-3-methylimidazolium tetrafluoroborate（BMIMBF4） room temperature ionic liquid is reported. Coumarin exhibits a one-electron, irreversible reduction to caroanion radical, and the latter species undergoes fast dimerization to dihydrodimer. The influences of scan rate, concentration and temperature were studied by cyclic vohammetry. The results show that the reaction is diffusion controlled. The diffusion coefficient D of coumarin in BMIMBF4 from Chronocoulometry is 5.066 × 10^-7 cm^2/s. Furthermore, the influences of water and substituting group during the electroreduction are discussed. These preliminary electrochemical experiments show encouraging results for the use of ionic liquids in a ＂green＂ electrochemistry.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2006年第6期1135-1137,共3页
Chemical Journal of Chinese Universities
基金
国家自然科学基金(批准号:20573037)
上海市科委重点项目(批准号:05JC1470)资助
关键词
离子液体
电还原
香豆素
Ionic liquid
Electroreduction
Coumairn
