ORGN 3 |
| Michael R. Wasielewski, Department of Chemistry, Department of Chemistry, Northwestern University, 2145 Sheridan Rd, Evanston, IL 60208-3113 |
| Our research explores the fundamental structural and electronic requirements for ultrafast photoinduced energy and electron transfer in extended arrays of donor-acceptor molecules. In this presentation we will describe several new molecules and materials produced by a combination of both chemical synthesis and self-assembly that employs energy and charge transport strategies inspired by natural photosynthetic systems. We will present results on new liquid crystalline perylenediimide-based materials that undergo rapid charge separation due to symmetry-breaking in their photoexcited singlet states. In addition, we will discuss a new series of self-assembling materials that use pre-organized covalent donor-acceptor building blocks to induce specific supramolecular structures. These molecules self-assemble into ordered materials both in solution and in the solid state driven by strong pi-pi interactions between functionalized aromatic molecules. These materials exhibit charge transport properties that mimic important features from photosynthetic reaction centers as determined from both time-resolved optical and magnetic resonance spectroscopy. |
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Molecular Mimicry of Photosynthesis
8:30 AM-12:00 PM, Sunday, August 22, 2004 Pennsylvania Convention Center -- Ballroom B, Oral
Division of Organic Chemistry |