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New methacrylic monomers containing pendant azobenzene structures have been prepared by reacting azobenzene assemblies possessing phenolic functions with methacryloyl chloride. The most favorable synthetic routes are described together with the yields obtained. The new monomers have been purified and completely characterized by elemental analysis and melting points, as well as by recording their UV, FT-IR and NMR spectra.

Five new organic-inorganic hybrids were generated from their corresponding co-polymer structures using thermal cross-linking process. The hybrid structures contain covalently-linked azobenzene units provided by the previous co-polymerization step between 3-methacryloxypropyl trimethoxy-silane and five novel azo-monomers. All structures have been characterized by FT-IR spectroscopy and TGA-MS analysis. The soluble co-polymers have also been characterized by SEC, elemental analysis and 1 H-NMR spectroscopy. It has been found that the thermal stability of the hybrid structures was enhanced, as compared to the soluble co-polymers, due to the newly generated Si-O-Si bonds. The newly prepared structures show a high content in chromophore units, as indicated by 1 H-NMR spectra and elemental analyses.

We report the synthesis of five new hybrid polymeric structures obtained by free radical copolymerization of some organic azo-based methacrylate monomers and 3-methacryloxypropyl trimethoxysilane (MEMO). The copolymers are soluble in common solvents like methylene chloride, chloroform, dichlorbenzene, dimethylsulfoxide, dimethylformamide. The copolymeric structures might be interesting from the point of view of nonlinear optical response due to a rich content in chromophoric units determined by H-NMR spectroscopy. The structures were also characterized by FT-IR spectroscopy, TGA and SEC analysis.