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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 >Alkali and halogen dependence of optical absorption bands of alkali-borate glasses
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Alkali and halogen dependence of optical absorption bands of alkali-borate glasses

机译：碱金属硼酸盐玻璃的光吸收带对碱和卤素的依赖性

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We examined the alkali and halogen ion concentration dependence of the optical absorption in alkali borate glasses. When potassium iodide was added to alkali borate glasses, I-3(-) molecules were formed and induced two bands with peaks at 287 and 354 nm. These bands increased with K2O concentrations until 10 mol%. and decreased with K2O from 20 to 25 mol%. In glasses with additions of KBr and KCI, the bands were observed at 266 and 259 ran, respectively. These positions were negligibly influenced by the kind of alkali ions. It is confirmed that all of these bands are attributed to the X-3 ions (X: halogen), by the comparison with absorption spectra of thin films prepared by simultaneous evaporation of alkali halide and a small amount of halogen. Molecular orbital (MO) calculations were also carried out to examine the charge distribution and structures. From the experimental results and MO calculations, we suggest that the X-3 ion binds to a boroxol ring that is coupled with a triborate group through an alkali ion. (C) 2001 Elsevier Science B.V. All rights reserved. [References: 11]
机译：我们研究了碱金属硼酸盐玻璃中光吸收的碱和卤素离子浓度依赖性。当将碘化钾添加到碱金属硼酸盐玻璃中时，形成I-3（-）分子，并诱导出两个在287和354 nm处出现峰的谱带。这些带随着K 2 O浓度的增加而增加，直到10mol％。并且用K 2 O从20摩尔％降低到25摩尔％。在添加KBr和KCI的玻璃中，分别在266和259 ran处观察到谱带。这些位置受碱离子种类的影响可忽略不计。通过与同时蒸发碱金属卤化物和少量卤素而制备的薄膜的吸收光谱进行比较，可以确认所有这些谱带均归因于X-3离子（X：卤素）。还进行了分子轨道（MO）计算，以检查电荷分布和结构。从实验结果和MO计算中，我们建议X-3离子与硼环结合，硼环通过碱离子与三硼酸酯基团偶联。 （C）2001 Elsevier Science B.V.保留所有权利。 [参考：11]

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