Intramolecular energy transfer and luminescence enhancement effect in   inert rare earth ions (La, Y, Gd)-Eu3+ (Tb3+) co-fabricated   organic-inorganic hybrid materials by covalent grafting

doi:10.1016/j.jphotochem.2007.08.016

CORC > 北京大学 > 化学与分子工程学院

	Intramolecular energy transfer and luminescence enhancement effect in inert rare earth ions (La, Y, Gd)-Eu3+ (Tb3+) co-fabricated organic-inorganic hybrid materials by covalent grafting
	Wang, Fang-fang ; Yan, Bing
刊名	journal of photochemistry and photobiology a chemistry
	2008
关键词	luminescence enhancement intramolecular energy transfer molecular hybrid materials covalently bonded LANTHANIDE COMPLEXES THIN-FILMS SOL SILICA MOLECULES BEHAVIOR
DOI	10.1016/j.jphotochem.2007.08.016
英文摘要	In this paper, a novel kind of organic-inorganic monomer, HIPA-TESPIC, has been achieved by modifying 5-hydroxyisophthalic acid (abbreviated as HIPA) with 3-(triethoxysilyl)-propyl isocyanate (abbreviated as TESPIC). The organic-inorganic monomers (HEPA-TESPIC) with two components equipped with covalent bonds can behave as a functional molecular bridge, which can not only coordinate to RE ions but also occur in in situ sol-gel process with inorganic host precursor tetraethoxysilane (TEOS), resulting a kind of molecular hybrid material (named as RE-HIPA-TESPIC) with double chemical bond (RE-O coordination bond and Si-O covalent bond). H-1 NMR, Fourier transform infrared (FT-IR) were applied to characterize the structure of HIPA-TESPIC and UV-vis spectrophotometer, phosphorescence, and luminescence spectra were applied to characterize the photophysical properties of the obtained hybrid material. Luminescent hybrid materials consisting of active rare earth ions (Tb3+, Eu3+)-inert rare earth ions (Y3+, La3+, Gd3+) complex covalently bonded to a silica-based network have been obtained in situ via a sol-gel approach. Through co-hydrolysis and polycondensation, active rare earth ions and inert rare earth ions can be introduced in the same organic-inorganic hybrid monomer and then formed Si-O backbones. The luminescent behavior has been studied with the different ratios of active rare earth ions-inert rare earth ions, which suggests that the existence of inert rare earth ions can enhance the luminescence intensity, which may be due to the intramolecular energy transfer between inert rare earth ions and active rare earth ions. (C) 2007 Elsevier B.V. All rights reserved.; Chemistry, Physical; SCI(E); 17; ARTICLE; 2-3; 238-246; 194
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/249289]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	Wang, Fang-fang,Yan, Bing. Intramolecular energy transfer and luminescence enhancement effect in inert rare earth ions (La, Y, Gd)-Eu3+ (Tb3+) co-fabricated organic-inorganic hybrid materials by covalent grafting[J]. journal of photochemistry and photobiology a chemistry,2008.
APA	Wang, Fang-fang,&Yan, Bing.(2008).Intramolecular energy transfer and luminescence enhancement effect in inert rare earth ions (La, Y, Gd)-Eu3+ (Tb3+) co-fabricated organic-inorganic hybrid materials by covalent grafting.journal of photochemistry and photobiology a chemistry.
MLA	Wang, Fang-fang,et al."Intramolecular energy transfer and luminescence enhancement effect in inert rare earth ions (La, Y, Gd)-Eu3+ (Tb3+) co-fabricated organic-inorganic hybrid materials by covalent grafting".journal of photochemistry and photobiology a chemistry (2008).