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Updated: Jan 19, 2026

Raman and IR Spectroelectrochemical Methods as Tools to Analyze Conjugated Organic Compounds
Published on: October 12, 2018
Unusual Photoelectrochemical Properties of Electropolymerized Films of a Triphenylamine-Containing Organic Small
Hong Yin1, Tong Yang1, Ke-Zhi Wang1
1Beijing Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry , Beijing Normal University , Beijing 100875 , People's Republic of China.
Abstract:
The electropolymerized films of poly(L) on an indium-tin oxide (ITO) electrode was prepared by anodic electrooxidation of a dichloromethane solution of a triphenylamine-carrying organic molecule L and were characterized/studied by ultraviolet-visible absorption spectroscopy, X-ray photoelectron spectroscopy, X-ray diffraction, electrochemical impedance spectroscopy, cyclic voltammetry, and photoelectrochemical measurements. Poly(L) films were found to show surface-controlled TPA•+1/0 associated quasi-reversible redox and exceptionally high photocurrent generation properties. At a zero external bias potential and under 100 mW/cm2 white light irradiation, a photoelectrochemical device composed of a poly(L)1-modified ITO as the working electode, a platinum disk counter electrode, and saturated calomel electrode reference electrode in a 0.1 M Na2SO4 aqueous solution exhibited a significant cathode photocurrent density of 2.2 μA/cm2, which could be switched to be anodic and outperform most previously reported molecule-based modified ITO electrodes under similar experimental conditions. The results indicate that poly(L) films offer a number of future perspectives ranging from organic photovoltaic to photoelectrochemical catalysis and sensing.
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