Rational design of crystalline supermicroporous covalent organic frameworks with triangular topologies.
Rational design of crystalline supermicroporous covalent organic frameworks with triangular topologies.
复制标题
具有三角形拓扑结构的晶体超明极共价有机框架的合理设计。
DOI：
10.1038/ncomms8786
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发表时间：
2015-07-16
影响因子：
16.6
通讯作者：
Jiang D
中科院分区：
文献类型：
--
作者：
Dalapati S;Addicoat M;Jin S;Sakurai T;Gao J;Xu H;Irle S;Seki S;Jiang D
共价有机骨架（COFs）是一类新兴的高度有序的多孔聚合物，具有许多潜在的应用。它们目前是通过六方和四方拓扑结构设计和合成的，限制了对新结构和性质的访问和探索。在这里，我们报告说，三角形拓扑结构可以开发的合理设计和合成一类新的COFs。三角形拓扑结构的特点是孔径小到12微米，这是迄今为止报道的COF的最小孔之一，以及高达0.25 nm−2的高π柱密度，这超过了超分子柱状π阵列和其他COF材料。这些结晶COF促进π-云离域并且是高度导电的，其中空穴迁移率是COF和多石墨系综中报道的最高的。 共价有机骨架由于其具有广泛的应用前景而引起了人们极大的兴趣。在这里，Jiang等人报道了两种具有三角形拓扑结构的材料，它们表现出由广泛的π云离域引起的高空穴迁移率。
Covalent organic frameworks (COFs) are an emerging class of highly ordered porous polymers with many potential applications. They are currently designed and synthesized through hexagonal and tetragonal topologies, limiting the access to and exploration of new structures and properties. Here, we report that a triangular topology can be developed for the rational design and synthesis of a new class of COFs. The triangular topology features small pore sizes down to 12 Å, which is among the smallest pores for COFs reported to date, and high π-column densities of up to 0.25 nm−2, which exceeds those of supramolecular columnar π-arrays and other COF materials. These crystalline COFs facilitate π-cloud delocalization and are highly conductive, with a hole mobility that is among the highest reported for COFs and polygraphitic ensembles. Covalent organic frameworks are currently arousing considerable interest due to their desirable properties for a wide range of applications. Here, Jiang et al. report two such materials with triangular topologies which exhibit high hole mobility arising from extensive π-cloud delocalisation.