Poised, equilibrium ion-transfer potential measurements. With the direct PT assignment made in the previous sections from diffusion-limited voltammetry and Multiphysics simulations of interfacial kinetics, DPP was selected as a suitable proton acceptor for further experimental investigation of interfacial proton-transfer kinetics. A conjugate-acid salt of DPP (2,6-diphenylpyridinium tetrakis(3,5bis(trifluoromethyl)phenyl)borate) was synthesized via a biphasic metathesis reaction reported in literature so that both forms of the "proton-transfer couple" could be initially present in the following nanopipette voltammetry measurement. Figure shows the effect of adding equal amounts of DPP and DPPHBArF to the TFT electrolyte.