Mixtures of on/off and off/on dyes to form multidimensional sensors

ANYL 119

Clifton J. Stephenson, stephenson@mail.chem.sc.edu, Department of Chemistry & Biochemistry, University of South Carolina, 631 Sumter St., Columbia, SC 29208 and Ken D. Shimizu, Department of Chemistry and Biochemistry, University of South Carolina, 631 Sumter Street, Columbia, SC 29208.
Dyes capable of turning on and off are well known for their use in single variable detection systems such as pH. Presented, will be our work towards the incorporation of mixtures of xanthene dyes into a multidimensional sensor system for small molecule amines. Xanthene dyes are known to have both an open and closed form where the open form is colored and highly fluorescent and the closed form is colorless and does not fluoresce. The ratio of open and closed forms varies depending on the specific structure and functionality of the dye and the analyte counter ion. Individual responses of the xanthene dyes to an analyte can be simultaneously measured in a single solution due to the unique absorbance and emission spectra of each dye. The multidimensional sensor system enables analysis of a wider range of functionalities than a single variable sensor system while also being more sensitive and discriminating.
 

General Papers
7:00 PM-9:00 PM, Sunday, 10 September 2006 Moscone Center -- Hall D, Poster

Division of Analytical Chemistry

The 232nd ACS National Meeting, San Francisco, CA, September 10-14, 2006