Emission spectra and luminescence life times of uranium-mica type compounds.
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概要
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A series of uranium–mica type compounds M(UO<SUB>2</SUB>)<SUB>2</SUB>(XO<SUB>4</SUB>)<SUB>2</SUB>·<I>n</I>H<SUB>2</SUB>O, where M=Ca, Sr, Ba, Mg, Na<SUB>2</SUB>, K<SUB>2</SUB>, and (H<SUB>3</SUB>O)<SUB>2</SUB>; X=P and As, as well as the doped samples of Mg(UO<SUB>2</SUB>)<SUB>2</SUB>(PO<SUB>4</SUB>)<SUB>2</SUB>·<I>n</I>H<SUB>2</SUB>O : Mn(0.03 mol %) and Zn-(UO<SUB>2</SUB>)<SUB>2</SUB>(PO<SUB>4</SUB>)<SUB>2</SUB>·<I>n</I>H<SUB>2</SUB>O: Cu(0.1 mol %), have been prepared and measured for emission spectra under the UV(365 nm) excitation and decay times. Some of these samples, <I>e.g.</I>, (H<SUB>3</SUB>O)<SUB>2</SUB>(UO<SUB>2</SUB>)<SUB>2</SUB>(AsO<SUB>4</SUB>)<SUB>2</SUB>·<I>n</I>H<SUB>2</SUB>O, have been found to give weak shoulders and a separated band, in addition to the six bands so far reported for other uranyl(VI) compounds. Samples containing AsO<SUB>4</SUB><SUP>3−</SUP> ions in place of PO<SUB>4</SUB><SUP>3−</SUP> gave emission spectra, where the main bands shifted by approximately 100 cm<SUP>−1</SUP> to lower energy also giving shorter life times. The decay times of the six emission bands of Mg(UO<SUB>2</SUB>)<SUB>2</SUB>(PO<SUB>4</SUB>)<SUB>2</SUB>·<I>n</I>H<SUB>2</SUB>O have been found to have the same value of 2.5×10<SUP>−4</SUP> s.
- 公益社団法人 日本化学会の論文
著者
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Sugitani Yoshinori
Department Of Chemistry Faculty Of Science Kanagawa University
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Nagashima Kozo
Department Of Chemistry The University Of Tsukuba
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Kato Kenji
Department Of Biology And Geosciences Faculty Of Science Shizuoka University
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Kato Kenji
Department of Chemistry, The University of Tsukuba
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