Hydrated rare-earth-metal ion-exchanged zeolite a: characterization by luminescence spectroscopy. Part 2.—The Eu3+ion

Autor:	Nantko Feiken, Adriaan M. H. van der Veen, George Blasse, Menno F. Hazenkamp
Rok vydání:	1992
Předmět:	Metal Chemistry visual_art Inorganic chemistry visual_art.visual_art_medium Qualitative inorganic analysis Emission spectrum Physical and Theoretical Chemistry Spectroscopy Luminescence Zeolite Excitation Ion
Zdroj:	J. Chem. Soc., Faraday Trans.. 88:141-144
ISSN:	1364-5455 0956-5000
DOI:	10.1039/ft9928800141
Popis:	The luminescence properties under high-resolution excitation and emission conditions at 4.2 K of hydrated Gd3+ion-exchanged zeolite A are reported. From these luminescence measurements it is found that in a sample containing 0.8 wt.% Gd3+, only one site appears to be occupied by Gd3+. In a freshly prepared sample containing 5 wt.% Gd3+ one site inside the zeolite is occupied by Gd3+. Other Gd3+ ions appear on silica surfaces present in the sample. When measurements on this sample were repeated a few months after preparation, Gd3+ ions were found in three sites within the zeolite cages. Information on the surroundings of the Gd3+ ions in the different sites was obtained from the emission spectra. In this way the possibility of characterizing the coordination of rare-earth-metal ions in zeolites by luminescence spectroscopy was evaluated.
Databáze:	OpenAIRE
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