POLY 458 |
| Conjugated organic polymers are receiving great attention due to the diverse applications that have emerged for these materials. An exciting extension of these materials has been fluorescent sensors. Remarkable chemical sensing sensitivity has been observed due to the electronic and photonic properties which result from the existence of an extended ï-system. We have synthesized and characterized a series of poly[p-(phenyleneethynylene)-alt-(thienyleneethynylene)] (PPETE) ‘turn off' polymers with variable percentage loading of the receptor (4'-{4-[2-(2,5-dibromothiophen-3-yl)-vinyl]phenyl}-2,2':6'2”-terpyridine. We have extended this methodology to include receptors for anions. There are relatively few examples of anion fluorescent sensors when compared with the literature devoted to cation sensing. We will describe recent synthetic efforts to prepare small molecule (E)-6-(2-(2,5-dibromothiophen-3-yl)vinyl)-2,3-di(1H-pyrrol-2-yl)quinoxaline (DPQ) based receptors on conjugated polymers for fluorescence cyanide anion sensing capabilities. |
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Conjugated Polymer Materials and Hybrids: Synthesis, Macromolecular Assemblies, and Nanostructures
6:00 PM-8:00 PM, Tuesday, August 21, 2007 BCEC -- Exhibit Hall - B2, Poster
Sci-Mix
Division of Polymer Chemistry |