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首页> 外文期刊>RSC Advances >Porous organic polymers derived from tetrahedral silicon-centered monomers and a stereocontorted spirobifluorene-based precursor: synthesis, porosity and carbon dioxide sorption
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Porous organic polymers derived from tetrahedral silicon-centered monomers and a stereocontorted spirobifluorene-based precursor: synthesis, porosity and carbon dioxide sorption

机译：衍生自四面体硅中心单体的多孔有机聚合物和基于立体螺螺氟烯基的前体：合成，孔隙率和二氧化碳吸附

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摘要

Sonogashira-Hagihara coupling reactions of tetrahedral silicon-centered monomers, i.e., tetrakis(4-bromophenyl)silane (p-Si) and tetrakis(3-bromophenyl)silane (m-Si), and stereocontorted 2,2',7,7'-tetraethynyl-9,9'-spirobifluorene (TESF) result in two novel porous organic polymers, POP-1 and POP-2. Compared with other porous polymers, these materials show high thermal stability and comparable specific surface areas with Brunauer-Emmer-Teller surface areas of up to 983 m(2) g(-1), and total pore volumes of up to 0.81 cm(3) g(-1) (POP-1). The N-2 isotherm analysis reveals that their porosities could be tuned by changing the structure geometry of the silicon-centered monomers. Further porosity comparison with other porous polymers indicates that the introduction of silicon-centered units in the porous networks could increase the porosity and copolymerization, i.e., changing the second monomer, is an efficient strategy to tune the porosity of the final materials. For applications, the resulting materials show moderate carbon dioxide uptakes of up to 1.92 mmol g(-1) (8.45 wt%) at 273 K and 1.03 bar, and 1.12 mmol g(-1) (4.93 wt%) at 298 K and 1.01 bar (POP-1), and also a comparably high binding ability with CO2 with an isostreic heat of 26.8 kJ mol(-1) (POP-1). Moreover, the materials exhibited moderate selectivity of CO2 over other gases, including N-2, O-2 and CH4. These results reveal that these materials could be potentially applied as promising candidates for storing and capturing CO2.
机译：的Sonogashira-萩原耦合四面体硅为中心的单体，反应的即，四（4-溴苯基）硅烷（P-Si）和四（3-溴苯基）硅烷（M-Si）和stereocontorted 2,2' ，7,7 “-tetraethynyl -9,9'-螺二芴（TESF）结果在两种新的多孔有机聚合物，POP-1和POP-2。与其他多孔聚合物相比，这些材料表现出高的热稳定性和可比较的比表面积高达983米（2）克（-1）的布鲁诺尔 - 二粒 - 特勒表面区域，以及高达0.81厘米的总孔体积（3 ）G（-1）（POP-1）。所述N-2等温线分析表明，它们的孔隙度可以通过改变硅为中心的单体的结构的几何形状来调节。与其他的多孔聚合物的孔隙率进一步比较表明，在多孔网络引进硅为中心的单位可以增加孔隙率和共聚，即，改变第二单体，是一种有效的策略，以调整最终的材料的孔隙率。对于应用程序，所得到的材料显示的适中的二氧化碳吸收量至1.92毫摩尔克（-1）（8.45重量％）在273 K和1.03巴，并在298K 1.12毫摩尔克（-1）（4.93重量％）和1.01巴（POP-1），并且也是相当高的结合能力与CO 2与26.8千焦mol的isostreic热（-1）（POP-1）。此外，材料表现CO2的选择性适中比其它气体，包括N-2，O-2和CH 4。这些结果表明，这些材料可被潜在应用为有希望的用于存储和捕获CO 2候选。

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  • 来源
    《RSC Advances》 |2015年第79期|共7页
  • 作者

    Ma Qing-Yu; Yang Bing-Xue; Li Jian-Quan;

  • 作者单位

    Univ Jinan Shandong Prov Key Lab Preparat &

    Measurement Bldg Jinan 250022 Shandong Peoples R China;

    Univ Jinan Shandong Prov Key Lab Preparat &

    Measurement Bldg Jinan 250022 Shandong Peoples R China;

    Univ Jinan Shandong Prov Key Lab Preparat &

    Measurement Bldg Jinan 250022 Shandong Peoples R China;

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