Ternary luminescent lanthanide-centered hybrids with organically modified titania and polymer units |
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Authors: | Xiao-Long Wang Bing Yan |
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Institution: | (1) Department of Chemistry, Tongji University, Siping Road 1239, Shanghai, 200092, People’s Republic of China; |
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Abstract: | Nicotinic acid (NA) is grafted to titanium alkoxide to achieve functional precursor Ti-NA, which then is coordinated to lanthanide
ions (Tb3+/Eu3+) to prepare the binary titania hybrid materials Ti-NA-Eu/Ti-NA-Tb via a sol–gel process in the presence of water. Furthermore,
two types of ternary titania hybrid materials, Ti-NA-Ln-PMAA/Ti-NA-Ln-PVP, are assembled by the introduction of the organic
polymers polymethacrylic acid (PMAA)/polyvinylpyrrolidone (PVP) into the above system. The FTIR spectra of these titania hybrid
materials confirm their basic composition, and the X-ray diffraction patterns reveal that they are amorphous. Luminescence
spectra and lifetimes of these titania hybrids are recorded, revealing that these hybrid materials with organic polymers exhibit
longer luminescence lifetimes and higher quantum efficiencies. |
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Keywords: | |
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