Enhanced emission of ultra-small-sized LaF3:RE3+ (RE = Eu, Tb) nanoparticles through 1,2,4,5-benzenetetracarboxylic acid sensitization

被引：70

作者：

Li, Suwen ^{[1
,2
]}

Zhang, Xiao ^{[1
]}

Hou, Zhiyao ^{[1
]}

Cheng, Ziyong ^{[1
]}

Ma, Pingan ^{[1
]}

Lin, Jun ^{[1
]}

机构：

[1] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Rare Earth Resource Utilizat, Changchun 130022, Peoples R China

[2] Changchun Inst Technol, Coll Sci, Changchun 130021, Peoples R China

来源：

NANOSCALE | 2012年 / 4卷 / 18期

基金：

中国国家自然科学基金;

关键词：

NEAR-INFRARED EMISSION; ENERGY-TRANSFER; LUMINESCENCE PROPERTIES; LANTHANIDE IONS; NANOCRYSTALS; FLUORESCENCE; COMPLEXES; CAF2; UNIFORM; GREEN;

D O I：

10.1039/c2nr31206a

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Uniform, ultra-small-sized and well-water-dispersible LaF3 nanoparticles doped with trivalent rare earth (RE) ions (Eu3+ or Tb3+) have been synthesized by a simple, low temperature synthesis route. The nanoparticles, with sizes of about 3.2 nm (for those doped with Eu3+) and 3.0 nm (for those doped with Tb3+), are roughly spherical and monodisperse. 1,2,4,5-Benzenetetracarboxylic acid (labeled as BA) as sensitizer has been bonded to the surface of the nanoparticles, which can sensitize the emission of RE3+ in the LaF3 nanoparticles. The BA-LaF3:RE3+ (RE = Eu or Tb) nanoparticles have a broad absorption band in the UV domain, and show enhanced luminescence of RE3+ based on an energy transfer from BA ligands to RE3+ ions (i.e. the so-called "antenna effect''). Due to the dual protection of organic ligands (BA) and inorganic matrices (LaF3), BA-LaF3:RE3+ (RE = Eu or Tb) nanoparticles have longer excited state lifetimes than LaF3:RE3+ (RE = Eu or Tb) nanoparticles as well as lanthanide coordination polymers of BA.

引用

页码：5619 / 5626

页数：8

共 49 条

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