To further investigate the turbidity changes caused by droplet formation in the reaction, we conducted UV/Vis spectroscopy experiments to monitor the turbidity changes at 600 nm (Figure ). Notably, the peak absorbance was significantly stronger with 10 equivalents of T3P compared to 5.0 equivalents under the same concentration of p-OMePhSH. The curve also revealed that higher amounts of T3P delayed the appearance of peak in turbidity, suggesting that PO(n-Pr)(p-OMePhS)₂ gradually aggregated over time.