Photophysical Properties of a Novel Organic-Inorganic Hybrid Material: Eu(III)-[Beta]-Diketone Complex Covalently Bonded to SiO^sub 2^/ZnO Composite Matrix

摘要

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 SiO^sub 2^/ZnO nanocomposite particle. Then the precursor DBM-Si and the terminal ligand 1,10-phenthroline (phen) were coordinated to Eu^sup 3+^ ion to obtain ternary hybrid material phen-Eu-DBM-SiO^sub 2^/ZnO after hydrolysis and copolycondensation between the tetraethoxysilane (TEOS), water molecules and the SiO^sub 2^/ZnO network via the sol-gel process. In addition, for comparison, the binary hybrid material with SiO^sub 2^/ZnO network and ternary hybrid material with pure Si-O network were also synthesized, denoted as Eu-DBM-SiO^sub 2^/ZnO and phen-Eu-DBM-Si, respectively. The results reveal that hybrid material with SiO^sub 2^/ZnO network phen-Eu-DBM-SiO^sub 2^/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 SiO^sub 2^/ZnO is a favorable host matrix for the luminescence of rare earth complexes. [PUBLICATION ABSTRACT]