A Study of the Effects of Titanium Dioxide Nanoparticles on the Fluorescent Intensity of Fluorescent Compounds in the Presence of Known Quenchers.

摘要

Titanium Dioxide is a naturally occurring oxide of titanium. It has a wide range of uses in commercial products for providing whiteness and opacity. It has photocatalytic properties and can also be used to produce electricity in its nanoparticles form. This research is focused on investigating the effect of titanium dioxide nanoparticles in analysis of compounds using luminescence-based techniques. Quenching, which is one of the basic problems of fluorescent measurements, was studied in the presence of molecular oxygen and methyl iodide. The rutile phase of titanium dioxide nanoparticles was synthesized by the acid hydrolysis of titanium isobutoxide at low temperatures with nitric acid. The crystalline powder was dissolved at different concentrations and used to monitor the fluorescence intensities of carbazole, pyrene, and fluoranthene in the presence of methyl iodide and oxygen. Quenching by molecular oxygen was studied by comparing the fluorescence intensities of compounds with and without degassing the solutions. Titanium Dioxide was found to exhibit interesting effects on the fluorescent intensities of these compounds in the presence of quenchers.