Dispersed molecular aggregates. 3. Synthesis and characterization of colloidal lead chromate in water/sodium bis(2-ethylhexyl) sulfosuccinate/n-heptane water-in-oil microemulsion medium

A nanocolloidal dispersion of lead chromate (PbCrO4) has been prepared in H 2O/sodium bis(2-ethylhexyl)-sulfosuccinate (AOT)/n-heptane water-in-oil (w/ o) microemulsion medium. The formation of the PbCrO4 in the water pool of t he microemulsion has been established by Fourier transform infrared measure ments. The absorbance and fluorescence behaviors of the colloidal PbCrO4 ha ve been investigated with varying water pool size, i.e., varying [water]/[A OT] mole ratio, omega. The dimension of the lead chromate encapsulated micr oemulsion droplets has also been determined by the dynamic light scattering method under varied w. The dimension and shape of the colloidal dispersion s in microemulsion have been examined by transmission and scanning electron microscopic measurements.