On-surface synthesis of covalent coordination polymers on micrometer scale

在表面上合成在下面超离频真空提供有希望的策略在原子水平控制物质，与为有显著电子、磁性，或催化的性质的新二维的材料的设计的重要含意。这策略必须由于共有原子价契约的不可逆的性质处理领域的有限扩展的问题，它阻止缺点成熟。我们这里证明扩大材料能被一个控制共淀积过程生产。特别地，有 Ag (111 ) 表面上的铁原子的 quinoid 两性离子分子的共淀积在 570 点认为 K 基于共有原子价协作契约允许测微计大小的领域的形成。这个工作开创测微计规模的构造在真空条件下面的单个层的共有原子价协作材料。

On-surface synthesis under ultrahigh vacuum provides a promising strategy to control matter at the atomic level, with important implications for the design of new two-dimensional materials having remarkable electronic, magnetic, or catalytic properties. This strategy must address the problem of limited extension of the domains due to the irreversible nature of covalent bonds, which prevents the ripening of defects. We show here that extended materials can be produced by a controlled co-deposition process. In particular, co-deposition of quinoid zwitterion molecules with iron atoms on a Ag（111） surface held at 570 K allows the formation of micrometer-sized domains based on covalent coordination bonds. This work opens up the construction of micrometer-scale single-layer covalent coordination materials under vacuum conditions.