ORGN 755 |
| There is strong motivation for developing methods that control the optical and electronic properties of molecular materials used in optoelectronic applications. To that end, we have developed a method for encapsulating functional chromophores within a helical amylose host. We have found that the amylose sheath shields the chromophores from intermolecular interactions, and aids in the self assembly of encapsulated chromophores onto surfaces. The chromophores in this study are donor-acceptor (D-A) molecules with various length n-alkyl chains between the D and A moieties, which modulates the photo-induced electron-transfer. Here, we describe synthesis of the D-A chromophores, helical encapsulation, and photophysical properties of the D-A molecules. Electron-transfer properties are characterized using (both steady state and time-dependent) emission spectroscopy for both non-encapsulated and encapsulated D-A chromophores in solution as well as a thin film self-assembly on a silicon surface. AFM images show that the assembly is vertically aligned at near monolayer coverage on a SiOH/Si surface. |
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Total Synthesis, Materials, Molecular Recognition, Process R&D, and Physical Organic Chemistry
8:00 PM-10:00 PM, Wednesday, 13 September 2006 Moscone Center -- Hall D, Poster
Division of Organic Chemistry |