Terasaki Seiya, Kotani Yuki, Katsuno Ryosuke, Matsuno Taisuke, Fukunaga Toshiya M, Ikemoto Koki, Isobe Hiroyuki
Department of Chemistry, The University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo, 113-0033, Japan.
Angew Chem Int Ed Engl. 2024 Aug 19;63(34):e202406502. doi: 10.1002/anie.202406502. Epub 2024 Jul 4.
Studies of graphene show that robust chemical bonds such as covalent bonds with trigonal-planar atoms afford layered atomic 2D crystals possessing unique properties. Although layered molecular crystals are of interest to diversify elements and structures of 2D materials, the structural diversity of molecules as well as weak intermolecular interactions inevitably makes the design to be one-off and individual. We herein report a versatile method to assemble layered molecular crystals. By developing a D-symmetry host at vertices to form a honeycomb layer, a diverse range of layered 2D host-guest crystals were obtained. Substituents on the host, elements/structures of the guest, the stereochemistry of the host and types of intercalants were diversified, which should allow for 6×32×3×2 combinations for structural diversification.
对石墨烯的研究表明，诸如与三角平面原子形成的共价键等强化学键可形成具有独特性质的层状原子二维晶体。尽管层状分子晶体对于二维材料的元素和结构多样化很有意义，但分子的结构多样性以及弱分子间相互作用不可避免地使得设计成为一次性的且个体化的。我们在此报告一种组装层状分子晶体的通用方法。通过在顶点处开发一种D对称性主体以形成蜂窝层，获得了多种层状二维主体 - 客体晶体。主体上的取代基、客体的元素/结构、主体的立体化学以及嵌入剂的类型都实现了多样化，这应该允许有6×32×3×2种结构多样化的组合。
