高等学校化学学报 ›› 1993, Vol. 14 ›› Issue (3): 320.

• 研究论文 • 上一篇    下一篇

对氟-γ-(4-二苯甲基哌嗪-l)-丁酰苯的吸附伏安行为的研究

郭旭明, 胡乃非, 林树昌   

  1. 北京师范大学化学系, 北京 100875
  • 收稿日期:1992-04-07 修回日期:1992-08-03 出版日期:1993-03-24 发布日期:1993-03-24
  • 通讯作者: 林树昌
  • 基金资助:

    国家自然科学基金

Adsorptive Stripping Voltammetry of p-Fluoro-( 4-Diphenylmethylpiperazino- l-yl)-Butyrophenone

GUO Xu-Ming, HU Nai-Fei, LIN Shu-Chang   

  1. Department of Chemistry, Deijiag Normal University, Beijing, 100875
  • Received:1992-04-07 Revised:1992-08-03 Online:1993-03-24 Published:1993-03-24

摘要: 在NH3-NH4Cl底液中,对氟-γ-(4-二苯甲基哌嗪-1)-丁酰苯(FDB)在汞电极上有一线性扫描还原峰.Epc=-1.43V(vs.饱和Ag/AgCl电极)。该峰具有明显的吸附性.当FDB浓度较小,扫描较快,搅拌富集时间较长时,电极反应完全为吸附态的FDB的还原所控制。吸附粒子为FDB中性分子.测得FDB在汞电极上的饱和吸附量为7.04×10-11mol/cm2。每个FDB分子所占电极面积为2.34nm2,不可逆吸附的转移系数α为0.64.并建立了吸附伏安法测定FDB的最佳条件.当富集时间为300s时,最低检测限可达5.0×10-10mol/L.

关键词: 对氟-y-(4-二苯甲基哌嗪-1)-丁酰苯, 吸附伏安法, 电化学性质

Abstract: In a supporting electrolyte containing NH3-NH4Cl, a reduction peak of p-fluoro-(4-diphenylmethylpiperazino-l-yl)-butyrophenone (FDB) was found by linear-sweep voltammetry at Hg electrode.The peak shows a potential of - 1.43 V(vs.Ag/AgCl) and adsorptive characteristics.The peak current was proved to be contributed by the reduction of both surface species of FDBadsorbed at Hg electrode and solution species of FDBdiffusing to the electrode.When the concentration of FDBis sufficiently low, the sweep rate is sufficiently small and the accumulation time is sufficiently long, the peak current is totally contributed by the reduction of adsorbed FDB.The adsorbed species is most probably neutral molecule of FDB.The saturated adsorption amount of FDBat Hg electrode is 7.04 × 10-11 mol/cm2 and every FDBmolecule occupies 2.34 nm2.The transfer coefficient a of the irreversible adsorptive system of FDBis 0.64.The detection limit of the adsorptive stripping voltammetry of FDBis 5.0 × 10-10 mol/Lwhen the accumulation time is 300 s under an optimized condition.

Key words: p-Fluoro-( 4-diphenylmethylpiperazino-1-yl )-butyrophenone, Adsorptive stripping voltammetry, Electrochemical characteristics

TrendMD: