Modulation of electronic properties of functional groups via conductive polymers

In order to study the influence of the oxidation state of a conductive polymer on the electronic properties of its substituents, two monomers have been polymerized electrochemically: one of them has an electropolymerizable group conjugated with the substituent (N-phenylpyrrole) while the other one has an insulating link between the two functional groups( N-benzylpyrrole). The films synthesized were analysed in situ by FTIR after polarisation at different potentials. In the case of N-phenylpyrrole, the intensities of the infrared absorptions characteristic of the substituants depend on the potential applied. For the N-benzylpyrrole, we don't observe any evolution of these vibrational bands with the potential applied.