title: Photophysical properties of a novel organic-inorganic hybrid material: Eu(III)-β-diketone complex covalently bonded to SiO(2) /ZnO composite matrix.
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 SiO(2) /ZnO nanocomposite particle. Then the precursor DBM-Si and the terminal ligand 1,10-phenthroline (phen) were coordinated to Eu(3+) ion to obtain ternary hybrid material phen-Eu-DBM-SiO(2) /ZnO after hydrolysis and copolycondensation between the tetraethoxysilane (TEOS), water molecules and the SiO(2) /ZnO network via the sol-gel process. In addition, for comparison, the binary hybrid material with SiO(2) /ZnO network and ternary hybrid material with pure Si-O network were also synthesized, denoted as Eu-DBM-SiO(2) /ZnO and phen-Eu-DBM-Si, respectively. The results reveal that hybrid material with SiO(2) /ZnO network phen-Eu-DBM-SiO(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(2) /ZnO is a favorable host matrix for the luminescence of rare earth complexes.
authors.affiliation: Department of Chemistry, Tongji University, Shanghai, China.
authors.forename: Ya-Juan
authors.initials: YJ
authors.lastname: Li
authors.forename: Bing
authors.initials: B
authors.lastname: Yan
mesh_terms: D005063:Europium / Q000737:chemistry*; D007659:Ketones / Q000737:chemistry*; D015335:Molecular Probes / Q000737:chemistry; D009942:Organometallic Compounds / Q000737:chemistry*; D010777:Photochemistry; D045663:Quantum Dots; D012822:Silicon Dioxide / Q000737:chemistry*; D015034:Zinc Oxide / Q000737:chemistry*
chemical_list: D007659:Ketones; D015335:Molecular Probes; D009942:Organometallic Compounds; D005063:Europium; D012822:Silicon Dioxide; D015034:Zinc Oxide