Kim Jun Yeong, Kang Jiwon, Cha Seungheon, Kim Haein, Kim Dopil, Kang Houng, Choi Isaac, Kim Min
Department of Chemistry, Chungbuk National University, Cheongju 28644, Republic of Korea.
Department of Chemistry Education, Chungbuk National University, Cheongju 28644, Republic of Korea.
Nanomaterials (Basel). 2024 Jan 2;14(1):110. doi: 10.3390/nano14010110.
Although Zr-based metal-organic frameworks (MOFs) exhibit robust chemical and physical stability in the presence of moisture and acidic conditions, their susceptibility to nucleophilic attacks from bases poses a critical challenge to their overall stability. Herein, we systematically investigate the stability of Zr-based UiO-66 (UiO = University of Oslo) MOFs in basic solutions. The impact of 11 standard bases, including inorganic salts and organic bases, on the stability of these MOFs is examined. The destruction of the framework is confirmed through powder X-ray diffraction (PXRD) patterns, and the monitored dissolution of ligands from the framework is assessed using nuclear magnetic resonance (NMR) spectroscopy. Our key findings reveal a direct correlation between the strength and concentration of the base and the destruction of the MOFs. The summarized data provide valuable insights that can guide the practical application of Zr-based UiO-66 MOFs under basic conditions, offering essential information for their optimal utilization in various settings.
尽管基于锆的金属有机框架（MOFs）在潮湿和酸性条件下表现出强大的化学和物理稳定性，但它们易受碱的亲核攻击，这对其整体稳定性构成了严峻挑战。在此，我们系统地研究了基于锆的UiO-66（UiO = 奥斯陆大学）MOFs在碱性溶液中的稳定性。研究了包括无机盐和有机碱在内的11种标准碱对这些MOFs稳定性的影响。通过粉末X射线衍射（PXRD）图谱确认了框架的破坏，并使用核磁共振（NMR）光谱评估了从框架中监测到的配体溶解情况。我们的主要发现揭示了碱的强度和浓度与MOFs破坏之间的直接相关性。汇总的数据提供了有价值的见解，可指导基于锆的UiO-66 MOFs在碱性条件下的实际应用，为其在各种环境中的最佳利用提供重要信息。
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