First Organosilicon Molecular Antennas

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• 作者：Yuriy N. Luponosov ; Sergei A. Ponomarenko ; Nikolay M. Surin ; Oleg V. Borshchev ; Elena A. Shumilkina ; Aziz M. Muzafarov
• 刊名：Chemistry of Materials
• 出版年：2009
• 出版时间：February 10, 2009
• 年：2009
• 卷：21
• 期：3
• 页码：447-455
• 全文大小：331K
• 年卷期：v.21,no.3(February 10, 2009)
• ISSN：1520-5002

文摘

Synthesis of new dendritic and “butterfly”-like oligothiophenesilanes by Suzuki coupling reactions of specially prepared branched precursors is described. Investigation of their optical properties in dilute THF solutions and in solid films revealed that both molecules show an efficient intramolecular energy transfer from the outer bithiophene to the internal terthiophenesilane units. Both experimental and theoretical estimations of the energy transfer efficiency showed the advantages of the more branched dendritic structure. The dendrimer has uniform absorption in the 280−430 nm region and almost quantitative energy transfer due to specific 3-D dendritic architecture.