ORGN 375 |
| Multipurpose, ordered nanoporous thin films have been generated on a variety of surfaces by utilizing the self-organising capabilities of supramolecular discotic liquid crystals and the reversibility of hydrogen bonding interactions. Possible applications include real-time electrochemical sensors, solar cells, miniaturised hard disks, and drug delivery devices. A D3h symmetric discotic H-bonding complex 1.2 was designed and prepared consisting of a benzotri(imidazole) core 2 bound to three complementary methacrylate-derived gallic acid units 1. Spin coated films of the discotic mesogen cooled gradually from the isotropic phase, show hexagonal dendritic patterns under crossed polarisers arising from homeotropic or ‘face-on' alignment. Rigid cross-linked films were created by photopolymerisation of the methacrylate units. Etching of the benzotri(imidazole) cores in a polar solvent afforded an ordered nanoporous scaffold with hexagonally-close packed pores.
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Molecular Recognition and Self-Assembly
8:00 AM-12:00 PM, Tuesday, 12 September 2006 Moscone Center -- Room 132, Oral
Division of Organic Chemistry |
