ORGN 502 |
| Development of photoreaction systems promoting selective oxidation of molecules with molecular oxygen is one of the most important subjects in photochemistry. Substrate- and product-selective oxygenations have been achieved using several organized and constrained media. The selectivity is, however, basically not changeable. Some systems can change the selectivity by an addition of a third component; however, this results in an irreversible change. Here we report that a polymeric sensitizer, consisting of N-isopropylacrylamide and rose bengal units, demonstrates a temperature-controlled changeable oxygenation selectivity by singlet oxygen in water. We report here that this unprecedented activity is driven by a heat-induced self-assembly of the polymer, which promotes selective encapsulation/elimination of substrates. |
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Physical Organic Chemistry, Metal-Mediated Reactions, Asymmetric Reactions and Syntheses
8:00 PM-10:00 PM, Tuesday, August 21, 2007 BCEC -- Exhibit Hall - B2, Poster
Division of Organic Chemistry |