PolyMOF Nanoparticles: Dual Roles of a Multivalent polyMOF Ligand in Size Control and Surface Functionalization
PolyMOF Nanoparticles: Dual Roles of a Multivalent polyMOF Ligand in Size Control and Surface Functionalization
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DOI：
10.1002/anie.201910542
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发表时间：
2019-11-11
影响因子：
16.6
通讯作者：
Johnson, Jeremiah A.
中科院分区：
文献类型：
--
作者：
Gu, Yuwei;Huang, Mingjun;Johnson, Jeremiah A.
金属有机骨架纳米颗粒（MOF NPs）已经成为一类重要的材料，与块状MOF材料相比，其在许多应用中显示出显著增强的性能;然而，它们的合成通常涉及在单独的步骤中控制粒度和表面性质的繁琐序列。现在，报道了一种在一锅中获得功能性MOF NP的简单策略，其使用具有用于表面官能化的聚合物嵌段和用于尺寸控制的具有可调多价性的配位嵌段的polyMOF配体。该策略产生尺寸低至20 nm的均匀聚MOF-5 NP，在暴露于环境条件时显示出优异的结构和胶体稳定性。详细的时间依赖性研究表明，聚MOF纳米颗粒形成后的聚集限制结晶机制。通过合成明确定义的聚U10 -66 NP证明了通用性。
Metal-organic framework nanoparticles (MOF NPs) have emerged as an important class of materials that display significantly enhanced performance in many applications compared to bulk MOF materials; their synthesis, however, commonly involves a tedious sequence that controls particle size and surface properties in separate steps. Now, a simple strategy to access functional MOF NPs in one pot is reported that uses a polyMOF ligand possessing a polymer block for surface functionalization and a coordination block with tunable multivalency for size control. This strategy produces uniform polyMOF-5 NPs with sizes down to 20 nm, displaying exceptional structural and colloidal stability upon exposure to ambient conditions. A detailed time-dependent study revealed that the polyMOF NPs were formed following an aggregation-confined crystallization mechanism. Generality was demonstrated through the synthesis of well-defined polyUiO-66 NPs.