Transient Exciplex Formation Electron Transfer Mechanism

Figure 8

Dependences of log𝑘_Q (top) and log(1/𝑘_Q−1/𝑘_Diff) (bottom) on Δ𝐺_ET^∗ for quenching of excited singlet (1) and triplet (2) states of biacetyl by alkenes in MeCN (according to the experimental data of Gersdrof et al. [33]). Best plots are shown for simulation of the experimental dependence by (3) (𝜆=0.9 eV) (dash line) and by concatenated mechanism (16) (solid line). Dotted line shows thermodynamic limit for ET.