The threat posed by the presence of artificial volatile organic compounds (VOCs) in the environment is a widely acknowledged fact, both for environmental issues and human health concerns. Ever-increasing production requires the continuous development of technologies toward the removal of these substances. In recent years, metal–organic frameworks (MOFs) have shown a great promise toward the capture of VOCs, but their stability in humid conditions still remains a major challenge, thus hindering their widespread development. To tackle this obstacle, we designed a 3-dimensional and porous MOF, named SION-82, for the capture of small aromatic VOCs, relying solely on π–π interactions. SION-82 captures benzene efficiently (107 mg/g) in dry conditions, and no uptake decrease was observed in the presence of high relative humidity for at least six cycles. Unlike HKUST-1 and MOF-74(Co), SION-82 possesses two vital characteristics toward sustainable benzene capture under humid conditions: moisture stability and reusability. In addition, SION-82 captures benzene under humid conditions more efficiently compared to the hydrolytically stable UiO-66, highlighting the impact of having an active site for benzene capture that is not affected by water. SION-82 can additionally capture other aromatic VOCs, showing pyridine and thiophene uptake capacities of 140 and 160 mg/g, respectively.

中文翻译：

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在潮湿条件下通过基于Metal的金属有机框架可持续捕获芳香族挥发性有机化合物。

无论是环境问题还是人类健康问题，在环境中存在人工挥发性有机化合物（VOC）所构成的威胁都是公认的事实。不断增长的产量要求不断开发技术以去除这些物质。近年来，金属有机框架（MOF）在捕获VOC方面显示出了广阔的前景，但其在潮湿条件下的稳定性仍然是一项重大挑战，因此阻碍了它们的广泛发展。为了解决这个问题，我们设计了一个三维多孔MOF，名为SION-82，用于捕集小的芳香族VOC，仅依靠π-π相互作用。SION-82在干燥条件下可有效捕集苯（107 mg / g），并且在高相对湿度的条件下至少六个周期内未观察到吸收减少。与HKUST-1和MOF-74（Co）不同，SION-82具有在潮湿条件下可持续捕集苯的两个重要特征：水分稳定性和可重复使用性。此外，与水解稳定的UiO-66相比，SION-82在潮湿条件下更有效地捕获苯，从而突出了具有不受水影响的苯捕获活性位点的影响。SION-82还可以捕获其他芳香族VOC，分别显示出140和160 mg / g的吡啶和噻吩吸收能力。