Photophysical Properties of a Novel Organic–Inorganic Hybrid Material: Eu(III)-β-Diketone Complex Covalently Bonded to SiO2/ZnO Composite Matrix |
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Authors: | Ya-Juan Li Bing Yan |
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Institution: | Department of Chemistry, Tongji University, Shanghai, China |
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Abstract: | In this article, dibenzoylmethane (DBM) was first grafted with the coupling reagent 3-(triethoxysilyl)-propyl isocyanate (TESPIC) to form precursor DBM–Si, and ZnO quantum dot was modified with 3-mercaptopropyltrimethoxysilane (MPS) to form SiO2/ZnO nanocomposite particle. Then the precursor DBM–Si and the terminal ligand 1,10-phenthroline (phen) were coordinated to Eu3+ion to obtain ternary hybrid material phen–Eu–DBM–SiO2/ZnO after hydrolysis and copolycondensation between the tetraethoxysilane (TEOS), water molecules and the SiO2/ZnO network via the sol–gel process. In addition, for comparison, the binary hybrid material with SiO2/ZnO network and ternary hybrid material with pure Si–O network were also synthesized, denoted as Eu–DBM–SiO2/ZnO and phen–Eu–DBM–Si, respectively. The results reveal that hybrid material with SiO2/ZnO network phen–Eu–DBM–SiO2/ZnO exhibits the stronger red light, the longer lifetimes and higher quantum efficiency than hybrid material with pure Si–O network phen–Eu–DBM–Si, suggesting that SiO2/ZnO is a favorable host matrix for the luminescence of rare earth complexes. |
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