Application notes 10 min read

UV-Visible spectroscopy & electrochemistry coupling: Spectroelectrochemical feasibility on a polypyrrol film – AN 12

Latest updated: August 31, 2021

Abstract

In this application note, the set-up of spectro-electrochemical measurements using Bio-Logic potentiostats/galvanostats is described. It is illustrated on a polypyrrol film which is electro-polymerized on ITO glass. The absorbance measurement is synchronized with the potential sweep of a cyclic voltammogram (CV) using a trigger signal.

 

Introduction

Electrochemistry alone is no longer deemed sufficient for discrimination and the advantages of coupling techniques are becoming increasingly attractive to researchers.

Instruments for electrochemical studies must be able to connect to other external instruments. Coupling techniques can make electrochemistry a powerful means of characterization. For example, polypyrrole films have been widely studied in electrochemistry especially the electropolymerization process [1-3]. Only using electrochemistry is not now sufficient to fully describe the whole electropolymerization process.

One can easily understand the interest of coupled methods in studying species with spectroscopic properties. Electrochemistry coupled with spectroscopic methods is now a common discriminating technique for polypyrrole studies [4-7]. Coupling methods often results in technical set-up problems when synchronizing electrochemical experiments and recording external measurements and variables.

 

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