Interparticle Forces of a Native and Encapsulated Metal-Organic Framework and Their Effects on Colloidal Dispersion,ACS Applied Materials & Interfaces

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Interparticle Forces of a Native and Encapsulated Metal-Organic Framework and Their Effects on Colloidal Dispersion
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2021-09-17 , DOI: 10.1021/acsami.1c13991
E L Butler ₁ , B Reid ₂ , P F Luckham ₃ , S Guldin ₂ , A G Livingston ₁ , C Petit ₁

Affiliation

The colloidal properties of suspended metal-organic frameworks (MOFs) are critical for device fabrication and application. Herein, van der Waals attractive, electric double layer repulsive, and steric repulsive forces of a native and encapsulated MOF are quantified for the first time. The van der Waals attractive forces were investigated by conducting environmental ellipsometric porosimetry (EEP) and spectroscopic ellipsometry (SE) on submicron, optical-quality nanoparticle films. The repulsive forces were determined from colloid and material characterization measurements. These data were used to predict suspension properties via extended Derjaguin, Landau, Verwey, and Overbeek theory. The state of dispersion was quantified for comparison with theoretical predictions for nine solvents. The MOF encapsulated with a surface-selective modification showed superior suspension in hydrophobic solvents. These findings should expedite the formulation of MOF colloidal suspensions for future works.

中文翻译：

天然和包封的金属-有机骨架的粒子间力及其对胶体分散的影响

悬浮金属有机框架 (MOF) 的胶体特性对于器件制造和应用至关重要。在此，首次量化了天然和封装 MOF 的范德华引力、双电层排斥力和空间排斥力。通过在亚微米光学质量纳米粒子薄膜上进行环境椭偏孔隙率测量法 (EEP) 和光谱椭偏测量法 (SE) 来研究范德华引力。排斥力由胶体和材料表征测量确定。这些数据用于通过扩展的 Derjaguin、Landau、Verwey 和 Overbeek 理论预测悬浮特性。量化分散状态以与九种溶剂的理论预测进行比较。用表面选择性修饰封装的 MOF 在疏水性溶剂中表现出优异的悬浮性。这些发现应该会加快 MOF 胶体悬浮液的配制，以用于未来的工作。

更新日期：2021-09-29

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