Noh Hyuk-Jun, Im Yoon-Kwang, Yu Soo-Young, Seo Jeong-Min, Mahmood Javeed, Yildirim Taner, Baek Jong-Beom
School of Energy and Chemical Engineering, Center for Dimension-Controllable Organic Frameworks, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST, Ulsan, 44919, South Korea.
Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, MD, 20899, USA.
Nat Commun. 2020 Apr 24;11(1):2021. doi: 10.1038/s41467-020-16006-0.
Planar two-dimensional (2D) layered materials such as graphene, metal-organic frameworks, and covalent-organic frameworks are attracting enormous interest in the scientific community because of their unique properties and potential applications. One common feature of these materials is that their building blocks (monomers) are flat and lie in planar 2D structures, with interlayer π-π stacking, parallel to the stacking direction. Due to layer-to-layer confinement, their segmental motion is very restricted, which affects their sorption/desorption kinetics when used as sorbent materials. Here, to minimize this confinement, a vertical 2D layered material was designed and synthesized, with a robust fused aromatic ladder (FAL) structure. Because of its unique structural nature, the vertical 2D layered FAL structure has excellent gas uptake performance under both low and high pressures, and also a high iodine (I) uptake capacity with unusually fast kinetics, the fastest among reported porous organic materials to date.
诸如石墨烯、金属有机框架和共价有机框架等平面二维（2D）层状材料因其独特的性质和潜在应用而在科学界引起了极大的关注。这些材料的一个共同特征是它们的构建单元（单体）是扁平的，位于平面二维结构中，具有层间π-π堆积，与堆积方向平行。由于层间限制，它们的链段运动非常受限，这在用作吸附剂材料时会影响其吸附/解吸动力学。在此，为了最小化这种限制，设计并合成了一种具有坚固稠合芳香梯形（FAL）结构的垂直二维层状材料。由于其独特的结构性质，垂直二维层状FAL结构在低压和高压下均具有出色的气体吸附性能，并且还具有高碘（I）吸附容量以及异常快速的动力学，是迄今为止报道的多孔有机材料中最快的。
