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首页> 外文期刊>RSC Advances >A novel pH-responsive POSS-based nanoporous luminescent material derived from brominated distyrylpyridine and octavinylsilsesquioxane
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A novel pH-responsive POSS-based nanoporous luminescent material derived from brominated distyrylpyridine and octavinylsilsesquioxane

机译：一种基于pH响应，基于POSS的基于POSS的纳米多孔发光材料，该材料来自溴化二苯乙烯基吡啶和八乙烯基倍半硅氧烷

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摘要

For the first time, a novel pH-responsive porous material based on POSS was easily prepared from the cubic octavinylsilsesquioxane (OVS) and brominated distyrylpyridine (Br-DSP) via the Heck coupling reaction. The resulting material possessed high porosity with Brunauer-Emmett-Teller specific surface area of 600 m(2) g(-1) and total pore volume of 0.58 cm(3) g(-1). It also exhibited high CO2 storage capability of 0.82 mmol g(-1) (3.62 wt%) at 298 K/760 Torr. The porous polymer was luminescent with the maximum emission at ca. 530 nm in the solid state, due to the incorporation of the conjugated structures of distyrylpyridine. Owing to the protonated nitrogen centers in the porous material, an excellent pH-responsive property was observed and a linear relation was established between the maximum luminescent emission wavelengths (lambda(em)) of the turbid liquid in buffer solutions and the corresponding pH values in the pH range from 1 to 4. This porous material is very promising as a fluorescent probe in the rapid test systems.
机译：首次，通过Heck偶联反应，由立方八乙烯基硅倍半氧烷（OVS）和溴化二苯乙烯基吡啶（Br-DSP）轻松制备了基于POSS的新型pH响应多孔材料。所得材料具有高孔隙度，Brunauer-Emmett-Teller比表面积为600 m（2）g（-1），总孔体积为0.58 cm（3）g（-1）。在298 K / 760 Torr时，它还显示出0.82 mmol g（-1）（3.62 wt％）的高CO2储存能力。多孔聚合物是发光的，其最大发射量约为。由于引入了二苯乙烯基吡啶的共轭结构，因此处于固态530 nm。由于多孔材料中的质子化的氮中心，观察到了优异的pH响应特性，并且在缓冲溶液中混浊液体的最大发光发射波长（lambda（em））与相应的pH值之间建立了线性关系。 pH范围从1到4。这种多孔材料非常适合在快速测试系统中用作荧光探针。

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