Luminescent polymer films based on blocksil siloxane copolymers and phenyleuropiumsiloxane molecular filler

In the present work, a method for the preparation of the new luminescent polymer compositions was described. A series of polymer films based on organosilicon dimethylsiloxane-phenylsilsesquioxane block-copolymer containing flexible linear dimethylsiloxane and rigid polycyclic phenylsilsesquioxane blocks in the structure of the macromolecule and polyfunctional phenyleuropiumethoxysiloxane [C6H5Si(OC2H5)2O]3Eu, as a molecular luminescent filler, was prepared and fully characterized. Physicochemical, mechanical, optical, and thermal properties all the polymer films were investigated. The polymer films form stable 3D networks and demonstrate a high thermal and thermo-oxidative stability. The study of mechanical properties showed that the tensile strength is in the range of 14–19 MPa, elongation at break is in the range of 5–8% and the Young's modulus is in the range of 380–560 MPa for the investigated polymers. The optical properties of the polymers were studied in the solid state at room temperature. It was shown, that upon excitation with 310 nm UV light the emission spectra of all samples show the five emission peaks that are characteristic for the Eu3+ ion arising from the 5D0→7FJ (J = 0–4) transitions.