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Fluorescence (blue) and ECL (red) spectra of (a) BB3 and (b) BB4. ECL emission was generated by oscillating the potential with a pulse width of 0.1 s from ~80 mV past the first oxidation and reduction waves of each Bpy-BODIPY homologue. ECL spectra were recorded in CH2Cl2 containing 0.1 M TBAPF6 with an accumulation time of 2 min.
