420 Interactions of Surface-Bound Rhodamine B with CB7

Friday, November 6, 2009: 1:20 PM
Rio Grande (Camino Real Hotel)
Ronald L. Halterman , Department of Chemistry and Biochemistry, University of Oklahoma, Norman, OK
Wai-Tak Yip , Department of Chemistry and Biochemistry, University of Oklahoma, Norman, OK
Jason L. Moore , Department of Chemistry and Biochemistry, University of Oklahoma, Norman, OK
Kevin A. Woodson , Department of Chemistry and Biochemistry, University of Oklahoma, Norman, OK
Control of Rhodamine B dye density on glass slides was achieved by initially coating the surface with varying ratios of azidohexylsiloxane/hexylsiloxane mixtures followed by copper-catalyzed “click” triazole formation with rhodamine B propargyl ester. Following siloxane crosslinking, absorption and emission spectra of coated slides in water indicated different surface dye densities and extents of dye aggregation. Complexation of the surface-tethered dyes by aqueous cucurbit[7]uril perturbed the spectra and indicated a disruption of aggregation. Comparisons of the host-guest properties of CB7-Rhodamine B in solution and on the surface will be discussed.