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- W1990962062 abstract "Polybromophenylsilsesquioxane (BrxOPS), where x = 5.3 (p:m = 65:25), because of its octahedral structure and nanometer size, represents a potentially very useful nanoconstruction site. We report here that Br5.3OPS reacts readily with borates of phenyl, biphenyl, naphthyl, 9,9-dimethylfluorene, and thiophene using standard Suzuki conditions to produce the corresponding polyaromatic and heteroaromatics with complete substitution of all bromines. The resulting materials, because of the 3-D octahedral structure, are completely soluble in a variety of common organic solvents. They are also stable to temperatures exceeding 400 °C in air, making them quite robust and easily processable. UV−vis spectra of these materials are red-shifted 20−30 nm from the simple organics, suggesting some conjugation with the silica cage core. Photoluminescence measurements show standard aromatic π−π* behavior with typical quantum efficiencies except for the 9,9-dimethylfluorene compound, which has an unexpectedly high quantum efficiency >95%. The resulting compounds offer potential for further functionalization." @default.
- W1990962062 created "2016-06-24" @default.
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- W1990962062 date "2005-04-28" @default.
- W1990962062 modified "2023-10-16" @default.
- W1990962062 title "Robust Polyaromatic Octasilsesquioxanes from Polybromophenylsilsesquioxanes, Br<i><sub>x</sub></i>OPS, via Suzuki Coupling" @default.
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- W1990962062 doi "https://doi.org/10.1021/ma0501141" @default.
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