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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Luminescent materials consisting of Eu(III) ions complexed in heteropolyoxometalates incorporated into silica xerogels
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Luminescent materials consisting of Eu(III) ions complexed in heteropolyoxometalates incorporated into silica xerogels

机译：由掺入二氧化硅干凝胶的杂多金属氧酸盐中的Eu（III）离子组成的发光材料

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摘要

Luminescent materials based on the energy transfer effect consist of heteropolyoxometalates of the type K-13[Eu(SiMoxW11-xO39)(2)] incorporated into xerogel matrices. Results of our experiments suggest that not only the composition parameter x (where x = 1, 3 and 5) of the salts with Eu(III) complex but also the type of the matrix influence the luminescent properties of these materials. The luminescent samples were characterized by such luminescence parameters as emission intensity, luminescence lifetime and quantum yield. The highest emission intensity of Eu(III) ions was exhibited by the salt with x = 1 incorporated into a silicate modified with 3-glycidoxypropyl groups. The longest lifetime was found in the material with a methylated silicate matrix with the same salt. For the complexed Eu(III) ions in these materials there is a correlation between emission intensity changes of the 5D(0) -> F-7(2) band and the quantum yield. The materials with a high organic content in matrices such as the silicates with 3-glycidoxypropyl groups (either with closed or opened epoxy cycles) are more thermally unstable and they undergo larger photochemical degradation during exposure on UV radiation than the systems with limited organic content. (c) 2006 Elsevier B.V. All rights reserved.
机译：基于能量转移效应的发光材料由掺入干凝胶基质中的K-13型杂多金属氧酸盐[Eu（SiMoxW11-xO39）（2）]组成。我们的实验结果表明，不仅具有Eu（III）配合物的盐的组成参数x（其中x = 1、3和5），而且基质的类型也会影响这些材料的发光性能。发光样品通过诸如发光强度，发光寿命和量子产率的发光参数来表征。 Eu（III）离子的最高发射强度通过x = 1的盐掺入由3-环氧丙氧基丙基改性的硅酸盐中表现出来。在具有相同盐的甲基化硅酸盐基质的材料中，发现使用寿命最长。对于这些材料中的复合Eu（III）离子，在5D（0）-> F-7（2）谱带的发射强度变化与量子产率之间存在相关性。与具有有限有机物含量的体系相比，基质中有机物含量高的材料（例如带有3-环氧丙氧基丙基的硅酸盐（具有闭合或开放的环氧循环））的热不稳定性更高，并且在紫外线辐射下会经历更大的光化学降解。 （c）2006 Elsevier B.V.保留所有权利。

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