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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 >Synthesis of ORMOSIL silica/rhodamine 6G: Powders and compacts
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Synthesis of ORMOSIL silica/rhodamine 6G: Powders and compacts

机译：ORMOSIL二氧化硅/若丹明6G的合成：粉末和压块

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The sol-gel method was used to prepare a silica matrix with rhodamine 6G. This dye was chemically bonded to silica matrix by grafting reactions, obtaining ORMOSIL/R6G powder, at two different concentrations, 0.03 mmol of dye/g silica and 0.009 mmol of dye/g silica, called ORMOSIL1 and ORMOSIL2, respectively. Fluorescent compacts were also obtained, through the high-pressure processing of these powders, at 7.7 GPa and room temperature. The microstructure, chemical composition and thermal stability of the powders and compacts were comparatively studied, by N-2 adsorption/desorption isotherms, FTIR spectroscopy, thermogravimetric analyses (TGA) and elemental analyses for carbon, hydrogen, and nitrogen (CHN). The, optical behavior was studied by fluorescence spectroscopy. The ORMOSIL1 compacts were completely opaque showing that the compaction was not effective, due to the high organic grade incorporated into the starting ORMOSIL1 powder. The ORMOSIL2 compacts were transparent showing an effective compaction, which are in agreement to the great surface area and porosity reduction. Additionally, it was observed in TGA results, the retention of the organics in these samples up to temperatures near 300 degrees C. The fluorescence emission showed that the dye was dispersed in molecular level in all samples. (c) 2006 Elsevier B.V. All rights reserved.
机译：溶胶-凝胶法用于制备具有罗丹明6G的二氧化硅基质。该染料通过接枝反应化学键合到二氧化硅基质上，获得了两种不同浓度的ORMOSIL / R6G粉末，分别为0.03 mmol染料/ g二氧化硅和0.009 mmol染料/ g二氧化硅，分别称为ORMOSIL1和ORMOSIL2。通过对这些粉末进行高压处理，在7.7 GPa和室温下也获得了荧光粉。通过N-2吸附/解吸等温线，FTIR光谱，热重分析（TGA）和碳，氢和氮的元素分析（CHN），对粉末和压粉的微观结构，化学成分和热稳定性进行了比较研究。通过荧光光谱研究了光学行为。 ORMOSIL1压块是完全不透明的，这表明压实效果不佳，这是由于在起始ORMOSIL1粉末中掺入了高有机级。 ORMOSIL2压坯是透明的，显示出有效的压实效果，这与大表面积和减少孔隙率是一致的。另外，在TGA结果中观察到，在直至接近300℃的温度下，这些样品中有机物的保留。荧光发射表明染料以分子水平分散在所有样品中。 （c）2006 Elsevier B.V.保留所有权利。

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