Fig. 5. Enantioselective electrosynthesis.

Analysis of reaction products after asymmetric electroreduction of acetophenone on chiral-imprinted Pt-Ir alloy surfaces. a HPLC chromatograms of chiral products obtained with potentiostatic electrosynthesis for 13 h and pulsed potential synthesis (pulse time 30 s) in 1 M NH₄Cl (pH 4.0) at −0.35 V using the different Pt-Ir electrodes. b Histograms summarizing the enantiomeric excess (%ee) for non-imprinted Pt-Ir, (S)-PE (red), and (R)-PE (green) imprinted Pt-Ir electrodes, obtained by steady-state electrosynthesis, or (S)-PE-imprinted Pt-Ir electrodes used in pulsed electrosynthesis with a total pulse duration of 13 h (dark blue) and 9 h (light blue). c Comparative graph of the %ee obtained from reusability tests of a (S)-PE-imprinted Pt-Ir electrode (orange) and literature results obtained with a (S)-PE-imprinted monometallic Pt electrode²⁶ (gray). Retention times of (R)-PE and (S)-PE are 13.0 and 13.9 min, respectively. The s.e.m. is 2.16 %ee.