Facile Synthesis of Novel Functionalized Silsesquioxane Nanostructures Containing an Encapsulated Fluoride Anion

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• 作者：Youssef El Aziz ; Alan R. Bassindale ; Peter G. Taylor ; Peter N. Horton ; Richard A. Stephenson ; Michael B. Hursthouse
• 刊名：Organometallics
• 出版年：2012
• 出版时间：September 10, 2012
• 年：2012
• 卷：31
• 期：17
• 页码：6032-6040
• 全文大小：366K
• 年卷期：v.31,no.17(September 10, 2012)
• ISSN：1520-6041

文摘

The presence of strongly electron withdrawing groups on alkoxysilanes, EWG-(CH₂)_n-Si(OEt)₃ (where n = 1鈥? and the electron-withdrawing group EWG contains an Si鈥揅(sp³) bond), facilitates the formation and encapsulation of the fluoride anion in a silsesquioxane cage. Such species have been studied by ¹⁹F and ²⁹Si NMR spectroscopy and X-ray crystallography together with MALDI-TOF and ESI mass spectrometry. The EWG must not be a good leaving group. Interestingly, this strategy led only to the T₈ cage and excellent yields were obtained (81鈥?5%) even without solvent. A wide range of functionalities were used. This new route offers an opportunity to build novel nanometer-sized 3-D molecular structures with a variety of functionalities which have not been accessible in the past.