Bradley University, Mund-Lagowski Department of Chemistry and Biochemistry, Peoria, IL 61625
Xanthene dyes are widely used dyes in consumer products and commercial materials. Therefore, it is interesting to explore their interactions with other molecules in aqueous solution. One example is the binding and electrostatic interactions between dye molecules and positively charged species, such as polycations. We have studied the interactions of both erythrosin B (2’,4’,5’,7’-tetraiodofluorescein), and Oregon Green (2’-7’-difluorofluoroscein) with polyMADQuat (polymethacryloxyethyltrimethylammonium chloride). Experimentation consisted primarily of optical spectroscopy including visible absorption, emission, and excitation spectra. Spectra were recorded for solutions that spanned a wide concentration of polyMADQuat. Future work will include analyzing the interactions of the polymer with individual dye molecules through fluorescence correlation spectroscopy.
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