The photophysical behavior of acridine (Acr) shows facilitated water-assisted protonation equilibrium between its deprotonted (Acr* similar to 10 ns) and protonated forms (AcrH(+)* similar to 28 ns) within confined region of ordered water molecules inside AOT/H2O/n-heptane reverse micelles (RMs). The time-resolved-area-normalized-emission spectra confirm both Acr* and AcrH(+)*, while time-resolved-emission spectra depict time evolution between them. Quenching of AcrH(+)* with N,N-dimethylaniline (DMA) is a purely diffusion-controlled bimolecular quenching with linear Stern-Volmer (S-V) plot, while nonlinearity arises with triethylamine (TEA) that forms ground state complex with AcrH(+) (AcrH(+)center dot center dot H2O center dot center dot TEA) indicating both static and dynamic quenching. Transient intermediates, DMA(center dot+) and AcrH(center dot) infer photoinduced electron transfer from DMA to Acr, while those from AcrH(+)center dot center dot H2O center dot center dot TEA complex suggest water mediated excited-state proton transfer (ESPT) between AcrH+ and TEA. The ESPT becomes faster in larger RMs due to enhanced mobility of hydronium ions in AcrH(+)center dot center dot H2O center dot center dot TEA, which reduces in smaller RMs as water becomes much more constrained owing to stronger complexation by excess confinement.