in this work we report a study of the effects of the exposure of selected alkylamines on the visible photoluminescence (PL) of porous Si (PS), including their intrinsic quenching ability, time scales of restoration, and the additional influence of a weak acid (TFA) on the restoration of FL. While comparable percentages of porous Si PL can be quenched with a given amount of n-propyl-, n-butyl-, or n-pentylamine, monitoring the extent of PL restoration over time reveals discriminating behavior between n-pentylamine and n-propyl/n-butylamine(s). As expected, increasing the porosity of the matrix does facilitate the restoration of FL. The introduction of trifluoroacetic acid (TFA) also speeds up the restoration of amine-quenched porous Si FL. Effects of organoamine exposure are also examined in light of any modification of the surface composition of porous Si, as probed by infrared spectroscopy (IR). The results reported here suggest that the diffusion of small amines within the porous Si matrix (as reflected in PL quenching/restoration behavior) is a function of the steric bulk of the amine chosen and the porous matrix where luminescent silicon nanoclusters reside.