title: Preparation of hybrid mesoporous silica luminescent nanoparticles with lanthanide(III) complexes and their exhibition of white emission.
abstract: We chose dipicolinic acid as a tridentate chelating unit featuring ONO donors to react with lanthanide(III) ions to yield tight and protective N(3)O(6) environments around the lanthanide(III) ions. We immobilized the lanthanide(III)-dipicolinic acid complexes on colloidal mesoporous silica with diameter smaller than 100 nm by a covalent bond grafting technique and obtained nearly monodisperse luminescent Eu-dpa-Si and Tb-dpa-Si functionalized hybrid mesoporous silica nanomaterials. These hybrid nanomaterials were characterized by powder X-ray diffraction, scanning electron microscopy, transmission electron microscopy, thermogravimetric analysis, nitrogen adsorption-desorption, and photoluminescence spectroscopic techniques. The hybrid mesoporous silica nanoparticles exhibit intense emission lines upon UV-light irradiation, owing to the effective intramolecular energy transfer from the chromophore to the central lanthanide Eu(3+) and Tb(3+) ions. Furthermore, the functionalized nanomaterials can be turned to white light materials after annealing at high temperature.
authors.affiliation: The State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun, 130012, PR China.
authors.forename: Daojun
authors.initials: D
authors.lastname: Zhang
authors.forename: Duihai
authors.initials: D
authors.lastname: Tang
authors.forename: Xuemin
authors.initials: X
authors.lastname: Wang
authors.forename: Zhen-an
authors.initials: ZA
authors.lastname: Qiao
authors.forename: Yantao
authors.initials: Y
authors.lastname: Li
authors.forename: Yunling
authors.initials: Y
authors.lastname: Liu
authors.forename: Qisheng
authors.initials: Q
authors.lastname: Huo