Abstract

The incorporation of an aromatic hydrocarbon fluorescent compound into silicone allows utilization of fluorescence quenching as a mechanism to measure molecular oxygen concentration in the composite matrix. Excitation and emission spectra of the aromatics change in agreement with the Franck-Condon model when the universal solvent is benzene. Fluorescence intensity was measured as a function of fluorophor concentration in several solvents: benzene; silicone fluids of different viscosities; and fully polymerized silicone. The relative fluorescence intensity of 9,10-diphenyl anthracene in poly(dimethyl siloxane) and silicone fluids was measured as a function of oxygen concentration, fluorophor concentration, and fluid viscosity. This results in a linear relationship between relative fluorescence intensity and concentration of oxygen.

© 1985 Optical Society of America

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