Controlled synthesis and luminescence properties of core-shell-shell structured SiO@AIPA-S-Si-Eu@SiO and SiO@AIPA-S-Si-Eu-phen@SiO nanocomposites.

Two novel core-shell structured SiO@AIPA-S-Si-Eu and SiO@AIPA-S-Si-Eu-phen nanocomposites have been synthesized by a bifunctional organic ligands ((HOOC)CHNHCONH(CH)Si(OCHCH)) (defined as AIPA-S-Si) connected with Eu ions and silica via covalent bond. And the corresponding core-shell-shell structured SiO@AIPA-S-Si-Eu@SiO and SiO@AIPA-S-Si-Eu-phen@SiO nanocomposites with enhanced luminescence have been synthesized by tetraethyl orthosilicate (TEOS) hydrolysis co-deposition method. The composition and micromorphology of the nanocomposites were characterized by means of Fourier-transform infrared spectroscopy (FT-IR), thermal gravimetric analysis (TG), X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy-dispersive X-ray spectrometry (EDX) and X-ray photoelectron spectroscopy (XPS).

Synthesis and photoluminescence properties of silica-modified SiO@ANA-Si-Tb@SiO, SiO@ANA-Si-Tb-L@SiO core-shell-shell nanostructured composites.

Three novel core-shell nanostructured composites SiO@ANA-Si-Tb, SiO@ANA-Si-Tb-L (L = second ligand) with SiO as the core and terbium organic complex as the shell were successfully synthesized. The core and shell were connected together by covalent bonds. The terbium ion was coordinated with organic ligand-forming terbium organic complex in the shell layer.

Luminescence Studies and Judd-Ofelt Analysis on SiO@LaPO:Eu@SiO Submicro-spheres with Different Size of Intermediate Shells.

The novel submicro-spheres SiO@LaPO:Eu@SiO with core-shell-shell structures were prepared by connecting the SiO submicro-spheres and the rare earth ions through an organosilane HOOCCHN(CONH(CH)Si(OCHCH) (MABA-Si). The as-prepared products were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and infrared spectroscopy (IR). It is found that the intermediate shell of the submicro-spheres was composed by LaPO:Eu nanoparticles with the size of about 4, 5-7, or 15-34 nm.

Synthesis and Luminescence Properties of Core-Shell-Shell Composites: SiOâ‚‚@PMDA-Si-Tb@SiOâ‚‚ and SiOâ‚‚@PMDA-Si-Tb-phen@SiOâ‚‚.

Two novel core-shell composites SiO₂@PMDA-Si-Tb, SiO₂@PMDA-Si-Tb-phen with SiO₂ as the core and terbium organic complex as the shell, were successfully synthesized. The terbium ion was coordinated with organic ligand forming terbium organic complex in the shell layer. The bi-functional organosilane ((HOOC)₂C₆H₂(CONH(CH₂)₃Si(OCH₂CH₃)₃)₂ (abbreviated as PMDA-Si) was used as the first ligand and phen as the second ligand.

Influence of citrate on phase transformation and photoluminescence properties in LaPO and LaPO:Eu.

The hexagonal and monoclinic phase LaPO and LaPO:Eu nanostructures have been controllably synthesized by a citrate-induced hydrothermal process at 100 °C. The crystal growth of LaPO nanostructures was investigated, and the phase transformation of nanostructured LaPO was systematically studied by varying the citrate concentration, pH value and reaction temperature. When 0.

Preparation, characterization and luminescence properties of core-shell ternary terbium composites SiO@Tb(MABA-Si)•L.

Two novel core-shell structure ternary terbium composites SiO@Tb(MABA-Si)·L(L:dipy/phen) nanometre luminescence materials were prepared by ternary terbium complexes Tb(MABA-Si)·L·(ClO)·2HO shell grafted onto the surface of SiO microspheres. And corresponding ternary terbium complexes were synthesized using (CONH(CH)Si(OCHCH)) (denoted as MABA-Si) as first ligand and L as second ligand coordinated with terbium perchlorate. The as-synthesized products were characterized by means of IR spectra, HNMR, element analysis, molar conductivity, SEM and TEM.