Surendranath and coworkers reported on quantifying interfacial electric fields at the Pt/H2O interface for the hydrogenation of 2-butene-1,4-diol at different pH values and across a wide range of ionic strength of the electrolyte. However, only a few examples in this field involved molecularly modified electrodes and discussed their role in the electrostatic field for catalysis. Nonetheless, an organic functionality was employed to investigate the catalytic activity of a modified system in the presence of an electric field. Electric-field-assisted anion-π catalysis was studied, exploring the addition of a malonic acid half thioester to enolates in the presence of immobilized catalysts on a conductive ITO surface (Figure ). Applying a positive potential to the surface to increase the polarization of the catalyst and the recognition of anionic intermediates stabilized the transition state for the disfavored addition product. Therefore, an inversion of selectivity toward the unfavored product A shown in Figure was observed when increasing the electric field. The electric field polarized the modified surface and stabilized the corresponding transition state, leading to the formation of the desired product.