Abstract
A new kind of organic precursor, Ti-DHBA-Si (DHBA=3,5-dihydroxybenzoic acid), was prepared via the reaction of a carboxylic group with titanium alkoxide and the modification of the double hydroxyl groups with the coupling agent 3-(triethoxysilyl)-propyl isocyanate (TEPIC). The organic precursor Ti-DHBA-Si and polymer PMMA (PMMA=Polymethyl methacrylate) were then simultaneously coordinated with europium ion, and the final polymeric hybrid material, Eu(Ti-DHBA-Si)3PMMA, was obtained after hydrolysis and co-polycondensation with tetraethoxysilane via a sol–gel process. X-ray diffraction patterns reveal that the hybrid material is amorphous. Scanning electronic microscopy images show uniform microstructure without phase separation. Photoluminescent spectra were characterized, and the results show that the hybrid material exhibits strong red-colored fluorescence, which can be explained by intramolecular energy transfer caused by coordination of the organic counterpart.
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