EXAFS analysis of blue luminescence in polyoxytungstate citrate gels

De Buysser K; Van Driessche I; Vermeir P; Thuy TT; Schaubroeck J; Hoste S

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EXAFS analysis of blue luminescence in polyoxytungstate citrate gels

机译：聚氧钨酸柠檬酸盐凝胶中的蓝色发光的EXAFS分析

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Remarkable color changes can be seen when ammonium metatungstate - citric acid gels are submitted to sunlight. The colors strongly depend of the pH values of the precursor solution. Luminescence measurements reveal that gels at pH 7 exhibit a strong blue emission resulting from the presences of WO42- tetrahedra while a slight green emission is due to WO66- octahedra. The shift in equilibrium from octahedral to tetrahedral coordination upon increase in pH is confirmed by detailed EXAFS analysis. (C) 2008 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

机译：当偏钨酸铵-柠檬酸凝胶暴露在阳光下时，可以看到明显的颜色变化。颜色强烈取决于前体溶液的pH值。发光测量表明，在pH 7的凝胶由于WO42-四面体的存在而显示出强烈的蓝色发光，而WO66-八面体则引起轻微的绿色发光。通过详细的EXAFS分析，可以确定pH值升高时从八面体到四面体配位的平衡变化。（C）2008 WILEY-VCH Verlag GmbH＆Co.KGaA，Weinheim

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《Physica status solidi, B. Basic research》 |2008年第11期|共7页
作者
De Buysser K; Van Driessche I; Vermeir P; Thuy TT; Schaubroeck J; Hoste S;
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正文语种 eng
中图分类固体物理学;
关键词
RAY-ABSORPTION SPECTROSCOPY; NEGATIVE THERMAL-EXPANSION; TUNGSTATE; CRYSTALS; ZRW2O8; REFINEMENT; SCHEELITE;

机译：射线吸收光谱;负热膨胀;钨酸盐;晶体;ZRW2O8;精炼;方沸石;

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1. EXAFS analysis of blue luminescence in polyoxytungstate citrate gels [J] . De Buysser K, Van Driessche I, Vermeir P, Physica status solidi, B. Basic research . 2008,第11期

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EXAFS analysis of blue luminescence in polyoxytungstate citrate gels

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