I have a polymer end-capped with a Polysilsesquioxane (POSS) like the one here: https://en.wikipedia.org/wiki/Silsesquioxane#/media/File:Silsesquioxane_T8_Cube.png where *R=i-butyl*.
I haven't found much info on what type or reactions these POSS groups can undergo.
I would like to know if there are some procedures to modify that POSS moiety and convert it into an amino, carboxyl or triethoxysilane group, for example.
Also, are those -R groups easy to replace? Or that Si-(i-butyl) bonds are very stable?
Hi Alfonso Brenlla, this is an interesting question. We have done a lot of silsesquioxane chemistry in the past. Just search our Research Items for the keyword "silsesquioxane" to get more detailed information, including review articles. A typical article is mentioned below. In general, it can be said that the organic R groups attached directly to Si (e.g. R = iBu, Ph, cyclo-C5H9, cyclo-C6H11) are rather stable and cannot be easily replaced. Thus chemistry involving silsesquioxanes is normally done with derivatives which have reactive functional groups such as Si–OH or Si–Cl.
Article Silsesquioxane Chemistry. IX [1] Synthesis and Characterizat...
Dear Abdelkader Mohamed Elsayed, thank you! If you or Alfonso Brenlla need any further information, please let me know. Our group has almost 30 years of experience in silsesquioxane chemistry.
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