The aim of the present work was the study of phosphonic acids grafting on the surface of SnO2at different molar ratios. In this paper we describe the functionalization of SnO2surfaces with phosphonic acids RPO(OH)2. The surface modification process was achieved by using phenyl-phosphonic acid (PPA) and vinyl-phosphonic acid (VPA). The synthesized materials were investigated by using FT-IR, TGA (in air and in nitrogen), EDX, ESEM, and TEM methods. This synthetic approach has many advantages: films with optical quality and controlled thickness can be obtained using low temperatures and cheap raw materials, by using “green chemistry” synthetic routes. The hybrid materials have structures diversity and fascinating applications, attracting attention for a long time, due to their potential.

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An introduction and overview of the transesterification method is presented in this review. This method is a very convenient way to obtain polyphosphoesters (PPEs). It can be simply described as a chemical reaction in which an ester is transformed into another one by the exchange of alkoxy groups. In this review, we will refer to the synthesis of PPEs via transesterification. In other words, it is focused on the applications of the transesterification method in phosphorus chemistry to obtain polymers (PPEs). The PPEs are an interesting class of organophosphorus polymers. These compounds are important for biological applications because of their biocompatibility and similarity to biopolymers. When the products are polymers, the chemical reaction is called polytransesterification. This method has also several applications in industry (esters of oil, paint industry). C