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首页> 外文期刊>Acta Crystallographica, Section B. Structural science, crystal engineering and materials >Crystal engineering on superpolyhedral building blocks in metal–organic frameworks applied in gas adsorption
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Crystal engineering on superpolyhedral building blocks in metal–organic frameworks applied in gas adsorption

机译：金属-有机骨架中超多面体构件的晶体工程在气体吸附中的应用

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摘要

Two metal–organic frameworks [PCN-426(Ni) and PCN-427(Cu)] have been designed and synthesized to investigate the structure predictability using a SBB (supermolecular building blocks) approach. Tetratopic ligands featuring 120° angular carboxylate moieties were coordinated with a [Ni_3(μ_3-O)] cluster and a [Cu_2O_2] unit, respectively. As topologically predicted, 4-connected networks with square coordination adopted the nbo net for the Ni-MOF and ssb net for the Cu-MOF. PCN-426(Ni) was augmented with 12-connected octahedral SBBs, while PCN-427(Cu) was constructed with tetragonal open channels. After a CO_2 supercritical drying procedure, the PCN-426(Ni) possessed a Brunauer– Emmett–Teller (BET) surface area as high as 3935 m~2 g~(-1) and impressively high N_2 uptake of 1500 cm~3 g~(-1). This work demonstrates the generalization of the SBB strategy, finding an alternative to inconvenient synthetic processes to achieve the desired structural features.
机译：设计并合成了两个金属有机框架[PCN-426（Ni）和PCN-427（Cu）]，以使用SBB（超分子构件）方法研究结构的可预测性。具有120°角羧酸酯部分的四位配体分别与[Ni_3（μ_3-O）]簇和[Cu_2O_2]单元配位。如拓扑预测那样，具有方形配位的4连接网络对Ni-MOF采用nbo网，对Cu-MOF采用ssb网。 PCN-426（Ni）增强了12个连接的八面体SBB，而PCN-427（Cu）则具有四边形明渠。经过CO_2超临界干燥程序后，PCN-426（Ni）的Brunauer–Emmett–Teller（BET）表面积高达3935 m〜2 g〜（-1），N_2吸收量高达1500 cm〜3 g，令人印象深刻。 〜（-1）。这项工作证明了SBB策略的普遍性，找到了不便的合成工艺的替代方案，以实现所需的结构特征。

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