Rare earth and zinc layered hydroxide salts intercalated with the 2-aminobenzoate anion as organic luminescent sensitizer

[Display omitted] Rare earth (RE=Eu, Y and Tb) and zinc layered hydroxide salts intercalated with nitrate anions were synthesized, followed by exchange with 2-aminobenzoate. The UV absorption ability was improved after intercalation/grafting in relation to that shown by the parent material. •Rare ea...

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Bibliographic Details
Published in:Materials research bulletin 2015-10, Vol.70, p.336-342
Main Authors: Cursino, Ana Cristina Trindade, Rives, Vicente, Arizaga, Gregorio Guadalupe Carbajal, Trujillano, Raquel, Wypych, Fernando
Format: Article
Language:English
Subjects:
ABSORPTION
CLATHRATES
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
DIFFERENTIAL THERMAL ANALYSIS
EXCITATION
FLUORESCENCE
FOURIER TRANSFORMATION
HYDROXIDES
INFRARED SPECTRA
Intercalation reactions
Layered compounds
Luminescence
PHOTOLUMINESCENCE
RARE EARTHS
SALTS
SENSITIZERS
SPECTROSCOPY
THERMAL GRAVIMETRIC ANALYSIS
ULTRAVIOLET RADIATION
X-RAY DIFFRACTION
ZINC
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Summary:[Display omitted] Rare earth (RE=Eu, Y and Tb) and zinc layered hydroxide salts intercalated with nitrate anions were synthesized, followed by exchange with 2-aminobenzoate. The UV absorption ability was improved after intercalation/grafting in relation to that shown by the parent material. •Rare earth (RE=Eu, Y and Tb) and zinc layered hydroxide were synthesized.•Intercalated nitrate anions were exchanged by 2-aminobenzoate.•In all the 2-aminobenzoate containing compounds, the grafting reaction was detected.•The UV absorption ability was improved after the exchange reactions.•Rare earth hydroxide salts are potential matrixes to produce luminescent materials. Rare earth (RE=Eu, Y and Tb) and zinc layered hydroxide salts intercalated with nitrate anions were synthesized, followed by exchange with 2-aminobenzoate. The obtained compounds were characterized by powder X-ray diffraction (PXRD), Fourier transform infrared (FTIR) and ultraviolet visible (UV–vis) spectroscopies, fluorescence measurements and thermal analysis (TGA/DTA). The results from FTIR spectroscopy suggest a direct coordination of 2-aminobenzoate to the metal cations of the inorganic layered structure. The organic derivative products from the intercalation reactions absorb a broader range of UV-light in relation to that shown by the parent material; the photoluminescence measurements present a strong violet, blue and green luminescence under UV-light excitation for layered compounds with, Zn, Y and Tb, respectively. Rare earth hydroxide salts (RE-LHS) are potential alternative matrices for the immobilization of organic species to produce luminescent materials.
ISSN:0025-5408
1873-4227
DOI:10.1016/j.materresbull.2015.04.055