ORGN 595 |
| Sona Sivakova and Stuart J Rowan. Department of Macromolecular Science and Engineering, Case Western Reserve University, 2100 Adelbert Road, Cleveland, OH 44106-7202 |
| Material properties of small molecules can be drastically altered by the use of supramolecular polymerization, i.e. the self-assembly of small molecules into polymer-like materials through the use of the non-covalent bond. The attachment of appropriate binding motifs can thus yield "supramolecular polymers" by a self-assembly process. One possibility is the use of the non-covalent bond to induce non-mesogenic small molecules to form liquid crystalline phases. DNA nucleobases are one of natures more interesting binding motifs. Our work has focused on initial studies on the use of the nucleobase derivatives, namely thymine and N6-(4-methoxybenzoyl)-adenine, to control the assembly of the fluorescent low molecular weight core, bis-4-alkoxy-substituted bis(phenylethynyl)-benzene. Individually, the monomers show no propensity for LC behavior and have very high melting points. However, upon mixing and melting these complementary nucleobase-terminated monomers, the melting temperature decreases dramatically along with concurrent formation of supramolecular liquid crystalline phase. |
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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 |
