The present study deals with the synthesis of silicon dioxide (SiO2) by sol gel method and also the investigation of its optical properties when dispersed in different coordinating and non-coordinating solvents. It was observed that absorption and emission properties of SiO2 could be effectively tuned simply by altering the solvent environment. Slight variations in absorption coefficient indicated solvent interaction with the SiO2 nanoparticles. Also, the band shapes varied in passing from coordinating to non-coordinating solvents which could be the result of change in solvent environment. The luminescence intensities of SiO2 nanoparticles were found to be appreciably higher in case of water and acetone environments.
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