Fig. 3: Oxidative degradation.
From: The degradation mechanism of multi-resonance thermally activated delayed fluorescence materials
a Liquid chromatograms of 100 μM 4 (Ar-saturated THF containing a 0.10 M tetrabutylammonium hexafluorophosphate supporting electrolyte) obtained during oxidative bulk electrolysis performed at an anodic potential of 1.04 V vs SCE. A Pt mesh and a Pt coil were used for the working and the counter electrodes, respectively. An Ag/AgNO3 pseudo-reference electrode was used. The peak marked with an asterisk (*) corresponds to a benzophenone internal standard. Chromatograms for 1−3 are shown in the Supplementary Fig. 8. b Decay in the concentration of the residual MR-TADF dopants during continuous oxidative bulk electrolysis performed at potentials of 1.04 V vs SCE (1 and 4), 1.01 V vs SCE (2), and 0.98 V vs SCE (3). Error bars represent the standard deviation of three independent experiments. The solid lines are linear fits of the initial five data points. c Quantum yields for photolysis (blue bars) and Faradaic yields for oxidative electrolysis (yellow bars) of 1−4. Values are compiled in Table 1. d Correlation between LT95 and the Faradaic yield for the oxidative degradation of the dopants. The gray line is a linear fit.
