Article
Microwave catalysis revisited: an analytical solution.
Institute of Mathematics, Physics and Mechanics, Jadranska 19, SI-1000 Ljubljana, Slovenia.
The Journal of Physical Chemistry A (impact factor:
2.95).
03/2010;
114(12):4197-202.
DOI:10.1021/jp100374x
pp.4197-202
Source: PubMed
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Citations (0)
- Cited In (2)
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Article: Photolumiscent properties of nanorods and nanoplates Y2O3:Eu3+.
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ABSTRACT: Nanorods and nanoplates of Y(2)O(3):Eu(3+) powders were synthesized through the thermal decomposition of the Y(OH)(3) precursors using a microwave-hydrothermal method in a very short reaction time. These powders were analyzed by X-ray diffraction, field emission scanning electron microscopy, Fourrier transform Raman, as well as photoluminescence measurements. Based on these results, these materials presented nanoplates and nanorods morphologies. The broad emission band between 300 and 440 nm ascribed to the photoluminescence of Y(2)O(3) matrix shifts as the procedure used in the microwave-hydrothermal assisted method changes in the Y(2)O(3):Eu(3+) samples. The presence of Eu(3+) and the hydrothermal treatment time are responsible for the band shifts in Y(2)O(3):Eu(3+) powders, since in the pure Y(2)O(3) matrix this behavior was not observed. Y(2)O(3):Eu(3+) powders also show the characteristic Eu(3+) emission lines at 580, 591, 610, 651 and 695 nm, when excited at 393 nm. The most intense band at 610 nm is responsible for the Eu(3+) red emission in these materials, and the Eu(3+) lifetime for this transition presented a slight increase as the time used in the microwave-hydrothermal assisted method increases.Journal of Fluorescence 01/2011; 21(4):1431-8. · 2.11 Impact Factor -
Article: Synthesis and study of the photophysical properties of a new Eu3+ complex with 3-hydroxypicolinamide.
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ABSTRACT: This work reports on the synthesis and characterization of a new complex of Eu(3+) with the 3-hydroxypicolinamide ligand (Hhpa). Here we present an approach for obtaining bis[2-carbamoyl(κO)pyridin-3-olato(κO')] lanthanide complexes, which were characterized through elemental analysis, thermal analysis, infrared and photoluminescence spectroscopies (emission, excitation, luminescence lifetimes, quantum efficiencies, Judd-Ofelt parameters and quantum yields). Although hpa can act as a bidentate ligand in different conformations, the results attest for the occurrence of a unique coordination site of low symmetry for the Eu(3+) ions, in which two anionic hpa ligands coordinate the cations through an O/O chelating system. The phosphorescence of the synthesized gadolinium complex provides the energy of the triplet state, which is determined to be at 20,830 cm(-1) over the ground state. This makes the Hhpa ligand very adequate for sensitizing the Eu(3+) luminescence, which leads to a very efficient antenna effect and opens a wide range of applications for the complex in light emitting organic-inorganic devices.Journal of Fluorescence 01/2011; 21(4):1575-83. · 2.11 Impact Factor
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Keywords
analytical solution
derivation
Implications
J. Phys
microwave catalytic effect
neutral ester hydrolysis
novel physical mechanism
ongoing effort
organisms
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previous work [Bren
quantitative understanding
realistic chemical reaction
rotationally hot reactive species