Applications of polymerized metal tetra-amino phthalocyanines towards hydrogen peroxide detection

作者：Mashazi Philani; Togo Chamunorwa; Limson Janice; Nyokong Tebello^*

来源：Journal of Porphyrins and Phthalocyanines, 2010, 14(3): 252-263.

DOI：10.1142/S1088424610001994

• hydrogen peroxide
• tetra-amino phthalocyanine
• atomic force microscopy
• electrochemical impedance spectroscopy
• cobalt
• manganese

This work reports the use of metallo tetra-amino phthalocyanines (MTAPc, M = Co and Mn) polymer thin films on gold and glassy carbon electrode surfaces for the detection and monitoring of hydrogen peroxide (H(2)O(2)). The polymer-modified electrodes were characterized using electrochemical and microscopic-based methods. Atomic force microscopy (AFM) was used to study the bare and polymer-modified ITO surfaces. The electrocatalytic reduction of H(2)O(2) with glassy carbon polymer-modified electrodes gave higher current densities compared to their gold counterparts. The electroanalytical properties of H(2)O(2) were obtained using a real-time calibration curve of the amperometric determination in pH 7.4 aqueous solution. The limits of detection (LoD) of the polymer-modified electrodes towards electroreduction of H(2)O(2) were of the order of 10(-7) M, with high sensitivity ranging from 6.0-15.4 mA.mM(-1).cm(-2).

• 出版日期2010-3