Figure 14.

Influence of “distance” (d) on two fundamental physical properties regarding photoredox catalysis and electrochemistry. The light absorption (A) and ohmic drop (ΔE_ohm) are both proportional to the pathlength of light propagation (d) and interelectrode distance (d). ε = molar extinction coefficient, c = molar concentration, I₀ = incident intensity, I = transmitted intensity (left), I = electric current (right), R_cell = electrical resistance of the cell, ρ = solution specific conductance, A = area of working electrode.