Investiagtions On Poly(Pyrrolyl-functionalized Ionic Liquid) Film Modified Electrode And Its Applications On Electrochemical Sensing Of Phenolic Compounds

In this paper,3-[1-butoxycarbnyl amino-propyl]^-1-[3-（N-pyrrole）propyl] imidazoliumtetrafluoroborate （t-BOC-APPI） BF4ionic liquid were synthesized and was characterized byIR, NMR, HPLC-MS, etc. In aqueous solution, a poly （ionic liquid） film waselectrochemically fabricated onto the glassy carbon electrode surface with potential-steptechnique. The morphology and electrochemical properties of the obtained poly（ionic liquid）film electrode were characterized with X-ray photoelectron spectroscopy （XPS） andelectrochemical impedance spectroscopy （EIS）, respectively. Electrochemical behaviors ofthe phenolic compounds on the poly（ionic liquid） film electrode were investigated withvoltammetry. The results indicate that, the rapid identification and the sensitive detection ofphenolic compounds can be achieved on the poly（ionic liquid） film electrode. The contentsare summarized as follows:1. Pyrrolyl-functional ionic liquid,3-[1-butoxycarbnyl amino-propyl]^-1-[3-（N-pyrrole）propyl] imidazolium tetrafluoroborate, was synthesized through quaternaryammoniation reactionation using a imidazole compounds as precursors. The obtained ionicliquid was verified by IR, NMR, HPLC-MS, etc.2. In3-[1-butoxycarbnyl amino-propyl]^-1-[3-（N-pyrrole） propyl] imidazoliumtetrafluoroborate aqueous solution, a poly （ionic liquid） film was electrochemically fabricatedon the glassy carbon electrodewith potential-step technique. Morphology and electrochemicalproperties of the obtained poly（ionic liquid） film electrode were characterized with scanningelectronic microscopy, X-ray photoelectron spectroscopy （XPS）, electrochemical impedancespectroscopy （EIS）, respectively.3. Electrochemical behaviors of bisphenol A on the poly（ionic liquid） film electrodewere investigated with voltammetry. The results indicate that the current response waslinearly related to the concentration of the bisphenol A in the range of1.0×10^-81×10^-5molL^-1, and the detection limit is4.0×10^-9molL^-1（S/N=3）. The obtained filmelectrode was successfully applied to the analysis of bisphenol A in drinking water bottle. Theresults are consistent with that of high performance liquid chromatography.4. Electrochemical behaviors of hexestrol on the poly（ionic liquid） film electrode wereinvestigated with voltammetry. The results indicate that the current response give a linearrelationship between the concentration of hexestrol in the range of5.0×10^-81.0×10^-5molL^-1, and the detection limit is2.1×10^-9molL^-1（S/N=3）.5. Electrochemical behaviors of magnolol on the poly（ionic liquid） film electrode wereinvestigated with voltammetry. The results indicate that the current response of magnolol give a linear relationship between its concentration in the range of5.0×10^-81.0×10^-5molL^-1,and the detection limit is2.2×10^-8molL^-1（S/N=3）. The results are consistent with the highperformance liquid chromatography when the sensor is used in the determination of themagnolol in the traditional Chinese medicine.