ADSORBED FUNCTIONALIZED PORPHYRINS ON POLYANILINE MODIFIED PLATINUM ELECTRODES. COMPARATIVE ELECTROCHEMICAL PROPERTIES

作者：Taranu B O; Fagadar Cosma E^*; Popa I; Plesu N; Taranu I

来源：Digest Journal of Nanomaterials and Biostructures, 2014, 9(2): 667-679.

• Porphyrins
• Polyaniline
• Cyclic voltammetry
• UV-Vis absorption
• Sensing materials

Polyaniline (PANI) modified platinum electrodes with and without 5-(4-pyridyl)-10,15,20-tris(phenoxy-phenyl) porphyrin (P1) and 5,10,15,20-tetra(allyloxy-phenyl) porphyrin (P2) adsorbed on their surface were investigated comparatively. Pt electrodes were modified using electrogenerated PANI from 0.5M H2SO4 solutions containing aniline monomer. P1 and P2 were adsorbed on the surface of the PANI modified electrodes by consecutive immersion in benzonitrile solutions, to achieve uniform porphyrin deposition and to prevent aggregation phenomena. The electrochemical behavior of the three types of modified electrodes (PANI, PANI-P1 and PANI-P2) was studied using cyclic voltammetry in monomer free H2SO4 solutions. UV-Vis spectra of solubilized films were also recorded and compared. The modified electrodes were investigated as sensing materials for cation potentiometric detection in several aqueous test solutions.

• 出版日期2014-6