Fig. 10. (a) FT-IR spectra, (b) CVs, and (c) UHPLCs of the Re(i) complexes before and after electrolysis at –1.82 V under a 1% CO₂ atmosphere in DMF–TEOA containing Et₄NBF₄ (0.1 M) as the supporting electrolyte (black lines: before electrolysis, red lines: after electrolysis). Measurement conditions were the same as those in Fig. 9.