ORGN 350 |
| Wonewoo Seo, Suk-Wah Tam-Chang, Kyle Rove, and Vincent J. Catalano. Department of Chemistry, University of Nevada, Reno, NV 89557 |
| We designed and synthesized an ionic perylenemonoimide derivative that self-organizes in water or methanol to give rod-shaped anisotropic crystals. The crystals exhibit dichroic absorption and anisotropic fluorescence emission of visible light. When the concentration of this mesogen in formic acid (aq., about 0.5 N) was increased to about 15 wt %, the mesogens self-organized into a lyotropic chromonic liquid-crystalline phase in which the molecules are anisotropically oriented. To guide the formation of the anisotropic liquid-crystalline domains, an isotropic solution of this mesogen was added to an array of microchannels on a PDMS template. Slow evaporation of solvent from the microchannels (under a glass substrate) resulted in the formation of liquid-crystalline domains and subsequently generated a micropattern of anisotropic solid that showed direction-dependent absorption and fluorescence emission.
|
|
Physical Organic, Combinatorial, Materials, Molecular Recognition
8:00 PM-10:00 PM, Tuesday, March 30, 2004 Anaheim Convention Center -- Hall A, Poster
Sci-Mix
Division of Organic Chemistry |