Hydrogen-Bonding Linkers Yield a Large-Pore, Non-Catenated, Metal-Organic Framework with pcu Topology
Hydrogen-Bonding Linkers Yield a Large-Pore, Non-Catenated, Metal-Organic Framework with pcu Topology
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DOI：
10.3390/molecules25030697
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发表时间：
2020-02
期刊：
影响因子：
4.6
通讯作者：
Mohammad S. Yazdanparast;V. Day;T. Gadzikwa
中科院分区：
文献类型：
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作者：
Mohammad S. Yazdanparast;V. Day;T. Gadzikwa
基于柱撑桨轮的金属有机骨架(MOF)材料是一个吸引人的目标，因为它们为构建定义良好的多功能材料提供了可靠的方法。这些材料的一个缺点限制了它们的应用，那就是它们倾向于形成连结的骨架，几乎没有可接近的体积。为了克服这一缺点，有必要研究构建非链柱桨轮多模光纤的策略。连接基上的氢键取代基被认为可以防止某些框架中的连锁反应，在这项工作中，我们提出了一个新的MOF来进一步支持这一理论。以2，2′-diamino-[1，1′-biphenyl]-4，4′-dicarboxylic酸、BPDC-(NH_2)_2、交联剂和联吡啶二醇为交联剂，组装了一种具有PCU拓扑结构的分子筛。这种新材料是非链状的，表现出大的可接近的毛孔和低密度。据我们所知，这种材料构成了孔容最大、密度最低的PCU骨架。我们将没有连接的原因归因于两个连接体上都存在氢键取代基。
Pillared paddle-wheel-based metal-organic framework (MOF) materials are an attractive target as they offer a reliable method for constructing well-defined, multifunctional materials. A drawback of these materials, which has limited their application, is their tendency to form catenated frameworks with little accessible volume. To eliminate this disadvantage, it is necessary to investigate strategies for constructing non-catenated pillared paddle-wheel MOFs. Hydrogen-bonding substituents on linkers have been postulated to prevent catenation in certain frameworks and, in this work, we present a new MOF to further bolster this theory. Using 2,2′-diamino-[1,1′-biphenyl]-4,4′-dicarboxylic acid, BPDC-(NH2)2, linkers and dipyridyl glycol, DPG, pillars, we assembled a MOF with pcu topology. The new material is non-catenated, exhibiting large accessible pores and low density. To the best of our knowledge, this material constitutes the pcu framework with the largest pore volume and lowest density. We attribute the lack of catenation to the presence of H-bonding substituents on both linkers.