To study the formation of these species and distinguish more details at the molecular level we moved to SEC with FTIR where it is possible to monitor bound CO2 species. The nitrile groups are convenient probes for the electron density of BTDN molecule, ranging from 2150 to 2250 cm -1 wavenumbers in the IR region. These experiments were performed at stair case cyclic voltammetry conditions with 20 mV step size and recording a spectrum at each potential step (scanning SEC). This method allows tight correlation between observed spectral changes and cyclic voltammograms (CV).