Fluorescence microscopy was performed using Nile Red as the dye at a concentration of 25 µM to monitor the degradation of liquid droplets formed by PO(n-Pr)(p-OMePhS)₂ (Figure ). First, for the 10 mM solution of p-OMePhSH without adding T3P as the control, n no higher-order structures were observed with the magnification of 200 ×. However, droplets are observed immediately after T3P was added to the 10 mM solution of p-OMePhSH and gradually disappear with time. After 7 hours, no droplets can be observed anymore. Combining reaction kinetics data with the fluorescent imaging, we conclude that it is the PO(n-Pr)(p-OMePhS)₂ aggregates to form the droplets and hydrolysis with time and the droplet formation has to be fueled by the T3P.