Photoluminescent rare-earth based biphenolate lamellar nanostructures
authors Karmaoui, M; Mafra, L; Ferreira, RAS; Rocha, J; Carlos, LD; Pinna, N
nationality International
journal JOURNAL OF PHYSICAL CHEMISTRY C
keywords ORGANIC-INORGANIC NANOCOMPOSITES; BETA-DIKETONATE COMPLEX; NONAQUEOUS SYNTHESIS; OPTICAL-PROPERTIES; NMR; NANOPARTICLES; NANOCRYSTALS; CRYSTALLINE; NANOHYBRIDS; SOLUBILITY
abstract A general nonaqueous route has been applied for the preparation of rare-earth ordered nanocrystalline hybrid structures. In a simple one-pot reaction process, Y(3+) and Gd(3+) isopropoxides were reacted in an autoclave with 4-biphenyl methanol at 275 degrees C. This approach leads to crystalline rare-earth oxide thin layers (similar to 0.6 nm) regularly separated from each other by organic layers of biphenolate molecules. The optical properties of these hybrid materials doped with Eu(3+) and Nd(3+), which are optical active lanthanides ions emitting in the red and near infrared, respectively, are presented. They show significant advantages compared to standard phosphors, such as higher radiance and luminance values, the possibility to tune the emission chromaticity by varying the excitation wavelength, and a much larger excitation range (250-350 nm and 300-500 nm for the Eu(3+) and Nd(3+) doped nanohybrids, respectively) shifted toward the red.
publisher AMER CHEMICAL SOC
issn 1932-7447
year published 2007
volume 111
issue 6
beginning page 2539
ending page 2544
digital object identifier (doi) 10.1021/jp0672609
web of science category Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary
subject category Chemistry; Science & Technology - Other Topics; Materials Science
unique article identifier WOS:000245005700028
  ciceco authors
  impact metrics
journal analysis (jcr 2019):
journal impact factor 4.189
5 year journal impact factor 4.404
category normalized journal impact factor percentile 64.576
dimensions (citation analysis):
altmetrics (social interaction):



 


Sponsors

1suponsers_list_ciceco.jpg