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首页> 外文期刊>Chinese science bulletin >Probing the microenvironment of an oligo-(p-phenylene vinylene) derivative encapsulated in polymer-impregnated sol-gel silica matrix
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Probing the microenvironment of an oligo-(p-phenylene vinylene) derivative encapsulated in polymer-impregnated sol-gel silica matrix

机译：探索封装在聚合物浸渍的溶胶-凝胶二氧化硅基质中的低聚对（对亚苯基亚乙烯基）衍生物的微环境

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摘要

Polymer-impregnated silica sol-gel composite materials are hosts for organics in advanced optics application. An oligo-phenylene vinylene derivative 4,4'-(1,4-phenylene dithenylene)-bis-(N-methyl pyridinium iodide) (OPVD) was introduced to poly(hydroxyethyl methacrylate) (PHEMA)-impregnated silica composite film by the sol-gel process. By comparing the X-ray diffraction, UV-visible spectra, steady-state and time-resolved fluorescence spectra of OPVD in three solid matrices (PHEMA/silica composite film, pure PHEMA film, and pure silica film), the similar results of PHEMA/silica composite film and pure PHEMA film demonstrate that the OPVD is primarily surrounded by a PHEMA-like environment in the composite matrix. The model of such structure is presented, which is useful for further understanding and optimizing of properties of doped sol-gel materials.
机译：聚合物浸渍的二氧化硅溶胶-凝胶复合材料是高级光学应用中有机物的主体。将低聚亚苯基亚乙烯基衍生物4,4'-（1,4-亚苯基二亚乙基）-双-（N-甲基碘化吡啶鎓）（OPVD）通过聚甲基丙烯酸羟乙酯（PHEMA）浸渍的二氧化硅复合薄膜引入。溶胶-凝胶法。通过比较三种固体基质（PHEMA /二氧化硅复合膜，纯PHEMA膜和纯二氧化硅膜）中OPVD的X射线衍射，UV可见光谱，稳态和时间分辨荧光光谱，得出类似的结果/二氧化硅复合膜和纯PHEMA膜表明，在复合基质中，OPVD主要被类似PHEMA的环境所包围。提出了这种结构的模型，这对于进一步理解和优化掺杂的溶胶-凝胶材料的性质是有用的。

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