Polymer–MOF Hybrid Composites with High Porosity and Stability through Surface-Selective Ligand Exchange
Polymer–MOF Hybrid Composites with High Porosity and Stability through Surface-Selective Ligand Exchange
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DOI：
10.1021/acs.chemmater.8b03881
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发表时间：
2018-11
影响因子：
8.6
通讯作者：
Vincent J. Pastore;Timothy R. Cook;J. Rzayev
中科院分区：
文献类型：
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作者：
Vincent J. Pastore;Timothy R. Cook;J. Rzayev
含有有机聚合物和金属-有机框架（MOF）的杂化材料因其利用多样功能性和高加工性的潜力而引起关注，但它们的制造受到母体组分不相容性的挑战。M0 F的溶解性差阻碍了在整个聚合物基质中的均匀分散，并且可能导致聚集，这不仅对基底的渗透性有害，而且还限制了聚合物的结构完整性。同时，聚合物链可以阻塞或穿透多孔结构，并通过降低表面积和孔径来损害MOF功能。我们报告了一种通用的共价杂交方法，通过合成后的配体交换，形成交联聚合物-MOF复合材料。由此产生的网络结构允许形成具有可变MOF负载的坚固的单片复合材料，其可以超过80%，其中配体交换仅限于表面位点，以便完全保留MOF表面积和…
Hybrid materials containing organic polymers and metal–organic frameworks (MOFs) have attracted attention for their potential to harness both diverse functionality and high processability, but their fabrication is challenged by incompatibilities of the parent components. The poor solubility of MOFs hinders uniform dispersion throughout a polymer matrix and may cause aggregation that is not only detrimental to the permeability of substrates, but also limits the structural integrity of the polymer. Meanwhile, polymer chains can block or penetrate the porous structures and compromise MOF functionality by reducing surface area and pore size. We report a versatile method of covalent hybridization through post-synthetic ligand exchange to form a cross-linked polymer–MOF composite. The resulting network structure allows for the formation of robust, monolithic composites with variable MOF loadings that may exceed 80% wherein ligand exchange is limited to surface sites so as to fully preserve MOF surface area and ...