香豆素在离子液体(BMIMBF_4)中的电还原行为  

Electroreduction Behavior of Coumarin in an Ionic Liquid(BMIMBF_(4))

作　　者：王欢[1] 薛腾[1] 张爱健[1] 张丽[1] 陆嘉星[1] 

机构地区：[1]上海市绿色化学与化学工程绿色化重点实验室华东师范大学化学系,上海200062

出　　处：《高等学校化学学报》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

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.

关 键 词：离子液体 电还原 香豆素 

分 类 号：O646[理学—物理化学]