COLL 548 |
| Hassan H. Rmaile and Joseph B. Schlenoff. Department of Chemistry and Biochemistry, Center for Materials Research and Technology (MARTECH), The Florida State University, Dittmer Research Building, box number 206, Tallahassee, FL 32306-4390 |
| Ultrathin films consisting of an alternating sequence of positively and negatively charged polyelectrolytes are prepared by means of electrostatic layer-by-layer deposition. In this work, we report the use of chiral polyelectrolytes to construct optically active polyelectrolyte multilayers of various compositions, thickness and combinations. The permeability and chiral selectivity properties of these multilayers were studied using rotating disc electrode (RDE) voltammetry. Different combinations of polyelectrolyte systems were used. Optically active polyelectrolyte multilayers were coated on platinum RDE to study their permeability and chiral selectivity for different pairs of electrochemically active chiral molecules. Among those molecules were L- and D-Ascorbic acid, L- and D-Dopa, and other synthesized alkyl viologens. These ultra thin optically active films are potentially useful as stationary phases in analytical separations, such as open tubular CEC and SFC. The ease with which these chiral multilayers can be constructed makes them very good candidates for further research involving chiral chromatography. |
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Chiral Surfaces
Division of Colloid and Surface Chemistry |