Tuesday, 24 May 2005 - 10:15 AM

This presentation is part of: Graduate Presentations

New Fluorogenic Calix[4]arene-bis-crown-6 Ether for Selective Recognition of Cs+

Ebony D. Roper1, Galina G. Talanova1, Maryna G. Gorbunova2, Richard A. Bartsch3, and Vladimir S. Talanov4. (1) Howard University, Washington, DC, (2) Oak Ridge National Laboratory, Oak Ridge, TN, (3) Texas Tech Unviversity, Lubbock, TX, (4) National Cancer Institute, NIH, Bethesda, MD

A new dansyl-group containing calix[4]arene-biscrown-6 ether has been obtained and investigated as an optical chemosensor for metal ions. In acidic CH3CN/H2O (1:1, v:v) solutions, the fluorogenic ligand exhibits appreciable selectivity for Cs+ over K+ and Na+. Coordination of Cs+ is followed by hypsochromic shift of the ligand's emission band along with increasing fluorescence intensity.

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