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首页> 外文会议>Pacific Rim Meeting on Electrochemical and Solid-State Science >(Invited) Defective Hierarchical Porous Copper-Based Metal-Organic Frameworks Synthesised Via Facile Acid Etching Strategy
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(Invited) Defective Hierarchical Porous Copper-Based Metal-Organic Frameworks Synthesised Via Facile Acid Etching Strategy

机译：（被邀请的）通过容易酸蚀刻策略合成的分层多孔铜基金属有机骨架

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Introducing hierarchical pore structure to microporous materials such as metal-organic frameworks (MOFs) can be beneficial for reactions where the rate of reaction is limited by low rates of diffusion or high pressure drop. This advantageous pore structure can be obtained by defect formation, mostly via post-synthetic acid etching, which has been studied extensively on water-stable MOFs. Here we show that a water-unstable HKUST-1 MOF can also be modified in a corresponding manner by using phosphoric acid as a size-selective etching agent and a mixture of dimethyl sulfoxide and methanol as a dilute solvent. Interestingly, we demonstrate that the etching process which is time- and acidity-dependent, can result in formation of defective HKUST-1 with extra interconnected hexagonal macropores without compromising on the bulk crystallinity. These findings suggest an intelligent scalable synthetic method for formation of hierarchical porosity in MOFs that are prone to hydrolysis, for improved molecular accessibility and diffusion for catalysis.
机译：将分层孔隙结构引入微孔材料，例如金属 - 有机骨架（MOF）可以有利于反应速率受扩散或高压速率限制的反应。该有利的孔结构可以通过缺陷形成获得，主要通过合成后的酸蚀刻来获得，这已经在水稳定的MOF上广泛地研究。在这里，我们表明，通过使用磷酸作为尺寸选择性蚀刻剂和二甲基亚砜和甲醇作为稀溶剂的二甲基砜和甲醇的混合物，还可以以相应的方式改性水不稳定的HKust-1moF。有趣的是，我们证明了依赖于时间和酸性的蚀刻过程，可以形成缺陷的HKust-1，其具有额外的互连的六方大麦克波雷，而不会影响散装结晶度。这些发现表明，用于在易于水解的MOF中形成分层孔隙率的智能可扩展合成方法，用于改善分子可接近性和催化的扩散。

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