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- W2095444671 abstract "A series of novel organic–inorganic hybrid materials with a Eu(III) complex [(C2H5)4N][Eu(DBM)3(DBM-OH)] (DBM = dibenzoylmethanate, DBM-OH = p-hydroxydibenzoylmethanate) covalently bonded into vinyl-modified silica networks have been successfully assembled through a sol–gel process. DBM-OH was grafted to the coupling agent 3-(triethoxysilyl)propylisocyanate (TESPIC), and the as-obtained molecular precursor DBM-Si was used as a bridge molecule both coordinate to Eu3+ and forming an inorganic Si–O network with tetraethoxysilane (TEOS) and vinyltriethoxysilane (VTES) after cohydrolysis and co-condensation processes. The luminescence properties of VTES/TEOS composite hybrid materials were systematically studied in comparison to those of TEOS-derived hybrid material and pure [(C2H5)4N][Eu(DBM)4], respectively. The results indicate that the luminescent quantum efficiencies of VTES/TEOS composite hybrid materials are greatly improved. And it is interesting to find that the luminescent intensity of VTES/TEOS composite hybrid material is enhanced by optimizing the molar ratio of VTES to TEOS (VTES:TEOS = 4:6) by 3.3 and 2.4 times compared with TEOS-derived hybrid material and pure [(C2H5)4N][Eu(DBM)4], respectively. In addition, the thermal stability of the emission was also improved considerably. The results presented in this paper indicate that the use of vinyl-modified silicates as a matrix opens the door to improving the photoluminescence properties of Eu(III) complexes." @default.
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- W2095444671 date "2010-09-01" @default.
- W2095444671 modified "2023-09-23" @default.
- W2095444671 title "Improved photoluminescence properties of a novel europium(III) complex covalently grafted to organically modified silicates" @default.
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- W2095444671 doi "https://doi.org/10.1016/j.jcis.2010.05.047" @default.
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