ORGN 592 |
| Kelly S. Chichak, Robert J A Ramirez, and J Fraser Stoddart. California NanoSystems Institute and Department of Chemistry and Biochemistry, University of California, Los Angeles, 405 Hilgard Avenue, Los Angeles, CA 90095-1569 |
| To date, there exist several literature reports that describe the solubilization of single-walled carbon nanotube (SWNT) ropes and bundles in either organic or aqueous solutions via the noncovalent attachment of a variety of natural and synthetic polymers. Even though these approaches significantly enhance the solubility and the manipulation of SWNTs, they lack the ability to discriminate and sort single tubes based on their diameters and lengths. In the light of this deficiency, we are pursuing novel solubilization and purification methods that rely on the dynamic noncovalent encirclement of SWNTs with charged transition metal-based cyclophanes (TMCs) and polymers. The cavity size of these TMCs and polymers can be designed to accommodate and discriminate between a range of SWNT diameters by employing readily available linear organic compounds and transition metal complexes of suitable geometries. The formation of these organized TMC/SWNT complexes can offer alternative routes toward future diameter- and length-selective separations and manipulations of SWNTs. This talk will describe our recent progress towards the noncovalent functionalization of SWNTs using transition metal-based cyclophanes. |
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Molecular Recognition and Self-Assembly
8:00 AM-12:00 PM, Thursday, April 1, 2004 Anaheim Convention Center -- 303A, Oral
Division of Organic Chemistry |