title: Photoluminescent properties of novel rare earth organic-inorganic nanocomposite with TiO2 modified silica via double crosslinking units.
abstract: A series of novel organic/inorganic rare earth (europium, terbium) hybrid materials through the coordination bond and covalent bond are synthesized and form an inorganic Si-O-Si by the sol-gel process. Mercapto-functionalized 4-mercaptobenzoic acid (MBA-Si) is obtained by using MBA and 3-(triethoxysilyl)-propyl isocyanate (TESPIC) as an organic bridge molecule, and then the carboxyl group of the precursor MBA-Si is used to modify the titanium dioxide, so as to sensitize the luminescence of rare earth ions. CdS-TiO(2)  is added to observe the influence of photoluminescence. 3-mercaptopropyltrimethoxysilane (MPS) is also used to modify the CdS quantum dot and obtain MPS functionalized MPS-CdS nanocomposite. These multicomponent hybrids with double cross-linking siloxane (MBA-Si) covalently bonding MPS-CdS are characterized. Subsequently, 1,10-phenanthroline (Phen) and 2,2,-bipyridyl (Bipy) as the assistant ligands together with water molecules are introduced into the rare earth hybrid system. The FT-IR, X-ray diffraction, UV-Vis, thermogravimetry and especially the photoluminescence properties of them are studied in detail.
authors: Department of Chemistry, Tongji University, Shanghai, China.
authors: Yan
authors: Y
authors: Zhao
authors: Bing
authors: B
authors: Yan
mesh_terms: D007287:Inorganic Chemicals / Q000737:chemistry; D049449:Luminescence; D008674:Metals, Rare Earth / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D053761:Nanocomposites; D009930:Organic Chemicals / Q000737:chemistry; D033362:Powder Diffraction; D012822:Silicon Dioxide / Q000737:chemistry*; D014025:Titanium / Q000737:chemistry*
chemical_list: D007287:Inorganic Chemicals; D008674:Metals, Rare Earth; D009930:Organic Chemicals; C009495:titanium dioxide; D012822:Silicon Dioxide; D014025:Titanium