Mechanochemical synthesis of an Eu(III) complex. Preparation and Luminescence Properties of PMMA:[C42H38N5O19Eu] Hybrid Films

Abstract Photoluminescent films of poly(methyl methacrylate), PMMA, doped with the complex [EuL2(H2O)2(NO3)3] were prepared, where L is the neutral ligand 2,6-bis[2-formylphenoxymethyl]pyridine (C21H17NO4). The Eu(III) complex was synthesized by classic chemosynthesis, and also through a solvent-free mechanochemical synthesis, and characterized by spectroscopy, thermal analysis (TGA and DTA), and single crystal X-ray diffraction. The mechanochemical route improves the yield for the complex, which is synthesized over times considerably shorter compared to the traditional synthesis, and through a solvent-free procedure. The photoluminescent properties of the Eu(III) complex and hybrid films PMMA:complex were studied. The Eu(III) luminescence is enhanced once the complex is embedded into the polymeric matrix. The hybrid films were characterized by optical microscopy, atomic force microscopy, XRD, TGA and DTA.

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