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Constructing 'breathing' dynamic skeletons with extra pi-conjugated adsorption sites for iodine capture

机译：构建“呼吸”动态骨架，具有额外的碘捕获的吸附位点进行碘捕获

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摘要

Radioiodine (I-129 and I-131) emission from the nuclear waste stream has aroused enormous apprehension because of its quick diffusion and radiological contamination. Conventional porous adsorbents such as zeolites and carbon with rigid skeletons and constant pore volumes reveal a limited performance for reliable storage. Here, a series of soft porous aromatic frameworks (PAFs) with additional pi-conjugated fragments is disclosed to serve as physicochemical stable media. Due to the flexibility of the tertiary amine center, the PAF products provide sufficient space for the binding sites, and thus exhibit a considerable capability for iodine capture from both gaseous and soluble environments. The obtained capacity of PAFs is ca. 1.6 times higher than that of PAF-1 which possesses similar aromatic constituents featuring an ultra-large specific surface area (BET = 5600 m(2) g(-1)). The novel paradigm of dynamic frameworks is of fundamental importance for designing adsorbents to treat environmental pollution issues.
机译：由于其快速扩散和放射性污染，核废料流的放射性碘（I-129和I-131）从核废料流的排放引起了巨大的忧虑。常规多孔吸附剂如沸石和碳含量，刚性骨架和恒定的孔隙体积显示有限的可靠储存性能。这里，公开了一系列具有额外PI缀合片段的软多孔芳族框架（PAF）以用作物理化学稳定介质。由于叔胺中心的柔韧性，PAF产品为结合位点提供足够的空间，因此表现出具有来自气态和可溶性环境的碘捕获的相当大能力。获得的PAFS的能力是CA。比PAF-1高1.6倍，其具有具有超大比表面积（Bet = 5600m（2）G（-1）的β= 5600m（2）G）的类似芳族成分。动态框架的新颖范式对于设计吸附剂来治疗环境污染问题是根本的重要性。

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  • 来源
    《RSC Advances》 |2019年第36期|共5页
  • 作者

    Xia Lixin; Yang Dongqi; Zhang Hongcui; Zhang Qian; Bu Naishun; Song Peng; Yan Zhuojun; Yuan Ye;

  • 作者单位

    Liaoning Univ Coll Chem Shenyang 110036 Liaoning Peoples R China;

    Liaoning Univ Coll Chem Shenyang 110036 Liaoning Peoples R China;

    Liaoning Univ Coll Chem Shenyang 110036 Liaoning Peoples R China;

    Liaoning Univ Coll Chem Shenyang 110036 Liaoning Peoples R China;

    Liaoning Univ Sch Environm Sci Shenyang 110036 Liaoning Peoples R China;

    Liaoning Univ Dept Phys Shenyang 110036 Liaoning Peoples R China;

    Liaoning Univ Coll Chem Shenyang 110036 Liaoning Peoples R China;

    Northeast Normal Univ Fac Chem Minist Educ Key Lab Polyoxometalate Sci Changchun 130024 Jilin Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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