Tetraethoxysilane derivatives structure

It was shown in (14) that tetraethoxysilane derivatives can be used as building blocks in the buildup of a hyperbranched structure successive steps in the synthesis of such a polymer have been discussed in (19). The main steps of this process are shown in Scheme 1. It was also discussed that scheme 1 illustrate an idealized development of... 

Matsuda, A., Kanzaki, T., Kotani, Y., Tatsumisago, M., Minami, T. (2001) Proton conductivity and structure of phosphosihcate gels derived from tetraethoxysilane and phosphoric acid or triethylphosphate. Solid State Ionics, 139, 113-139. 

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