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Issue 88, 2015
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Novel organic–inorganic hybrids based on T8 and T10 silsesquioxanes: synthesis, cage-rearrangement and properties

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Abstract

In this paper, we present a simple approach for the synthesis of well-defined macromolecules based on precisely isolated amino- and amido-functionalized octa T8 and deca T10 silsesquioxanes (SQs). Here, we show that reorganization of the siloxane cage-like core (T8 → T10) can be easily performed, including isolation of intermediates, and cage rearrangement achieved by using Brønsted superacid, trifluoromethanesulfonic acid (CF3SO3H). Moreover, T10-like SQs can be obtained in a one-step reaction by alkoxysilane condensation in trifluoromethanesulfonic acid conditions. The resulting decamers of amine-SQ and an amido-functionalized derivative containing long alkyl chains are reported for the first time in the literature. The non-fluorinated amido derivatives due to their lamellar-like nature and specific packing can serve as transparent hydrophobic coatings in various industrial applications. The obtained compounds were fully characterized using FT-IR, UV-vis, multinuclear NMR (1H, 13C, 29Si), DOSY NMR, TG-DTA, DSC, HR-MS, TEM, EDS and elemental analysis.

Graphical abstract: Novel organic–inorganic hybrids based on T8 and T10 silsesquioxanes: synthesis, cage-rearrangement and properties

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Publication details

The article was received on 28 May 2015, accepted on 17 Aug 2015 and first published on 18 Aug 2015


Article type: Paper
DOI: 10.1039/C5RA10136K
Citation: RSC Adv., 2015,5, 72340-72351
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    Novel organic–inorganic hybrids based on T8 and T10 silsesquioxanes: synthesis, cage-rearrangement and properties

    M. Janeta, Ł. John, J. Ejfler and S. Szafert, RSC Adv., 2015, 5, 72340
    DOI: 10.1039/C5RA10136K

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