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Stability of zeolitic imidazolate frameworks: effect of forced water intrusion and framework flexibility dynamics

机译:沸石咪唑酯骨架稳定性:强制水侵入和框架灵活性的影响

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摘要

Stability of metal-organic frameworks is one of the central issues for their successful usage in an increasingly wide range of applications. Particularly Zeolitic Imidazolate Frameworks (ZIFs) are known for their high stability. Herein we use the two most stable representatives ZIF-8 and ZIF-67 to show that the concomitant effect of pressure and temperature upon water intrusion/extrusion cycles is strikingly higher compared to the separate effects of either pressure or temperature and leads to previously unobserved irreversible structural changes. We also explore the effect of compression-decompression speed on the pronounced breathing effect of indicated ZIFs as part of high-pressure operation and show that framework relaxation time may be very long and should be taken into account for potential applications.
机译:金属 - 有机框架的稳定性是他们在越来越多的应用中成功使用的核心问题之一。 特别是沸石咪唑酯骨架(ZIFS)以其高稳定性已知。 在这里,我们使用两个最稳定的代表ZIF-8和ZIF-67,表明与任一压或温度的单独效果相比,水入侵/挤出循环对水入侵/挤出循环时的压力和温度的伴随效果显着更高,并导致以前不可避免的不可逆转 结构变化。 我们还探讨了压缩 - 减压速度对所示Zifs的发音呼吸效果的影响,作为高压操作的一部分,并显示框架弛豫时间可能很长,应考虑到潜在的应用。

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  • 来源
    《RSC Advances》 |2015年第109期|共5页
  • 作者单位

    Universit′e Clermont Auvergne ENSCCF Institut de Chimie de Clermont-Ferrand BP 10448 63000 Clermont-Ferrand France;

    Universit′e Clermont Auvergne ENSCCF Institut de Chimie de Clermont-Ferrand BP 10448 63000 Clermont-Ferrand France;

    Universit′e Clermont Auvergne ENSCCF Institut de Chimie de Clermont-Ferrand BP 10448 63000 Clermont-Ferrand France;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
  • 关键词

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