A Solid-Cladding/Liquid-Core/Liquid-Cladding Sandwich Optical Waveguide for the Study of Dynamic Extraction of Dye by Ionic Liquid BmimPF6
A Solid-Cladding/Liquid-Core/Liquid-Cladding Sandwich Optical Waveguide for the Study of Dynamic Extraction of Dye by Ionic Liquid BmimPF6
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DOI：
10.1366/11-06389
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发表时间：
2012-07-01
影响因子：
3.5
通讯作者：
Wang, Jianhua
中科院分区：
文献类型：
--
作者：
Chen, Xuwei;Sakurazawa, Atsushi;Wang, Jianhua
提出了一种用于研究离子液体对染料分子动态萃取的夹层式液芯波导。入射光通过熔融石英棱镜直接引入到IL相的芯中，以在IL/包层界面处形成全反射。在提取过程中，通过将光学焦点保持在IL/水界面上，监测光强度和吸收光谱随时间的变化。研究了IL-1-n-丁基-3-甲基咪唑六氟磷酸盐（BmimPF（6））在不同浓度和不同pH条件下对染料铬黑T（EBT）的动态萃取。结果表明，在IL/水界面的染料的积累和染料的动态提取到IL相都有助于吸光度的增加。随着pH值的增加，信号沿着增加，表明静电相互作用可能是BmimPF提取EBT的主要驱动力（6），IL提供的微环境也对波导系统记录的光谱特性具有决定性影响。
We present a sandwich liquid-core waveguide for the study of the dynamic extraction of dye molecules by ionic liquid (IL). The incident light was introduced into the core of the IL phase directly via a fused silica prism to form total reflection at the IL/cladding interface. The changes in light intensity and absorbance spectra over time were monitored during the extraction process by maintaining an optical focus on the IL/water interface. The dynamic extraction of the dye Eriochrome Black-T (EBT) by the IL 1-n-butyl-3-methylimidazolium hexafluorophosphate (BmimPF(6)) at different concentrations and various pH conditions was investigated. The results indicated that the accumulation of the dye at the IL/water interface and the dynamic extraction of the dye into the IL phase both contributed to the increase in absorbance. The increased signal along with the increase in pH suggests that electrostatic interaction might be the main driving force for the extraction of EBT by BmimPF(6), and the micro-circumstance provided by IL also has a decisive effect on the characteristics of the spectra recorded by the waveguide system.