The functionalization of layered materials is one of the current challenges in material science. Exfoliated rhombohedral (gray) arsenic represents a promising layered material for the fabrication of electronic devices and sensors; however, synthetic protocols for tuning its properties or protecting the surface by covalent functionalization are not known. In this communication, we present its covalent functionalization accompanied by the exfoliation of rhombohedral arsenic in the presence of ultraviolet light irradiation and chromium hexacarbonyl. During this modification, the arsenic atoms act as ligands to the chromium metal center. We believe that this study provides a promising approach for the modification of rhombohedral few-layer arsenene and enables its application in various fields, including electronic devices, sensors, and energy devices.

分层材料的功能化是材料科学当前的挑战之一。脱落的菱面体（灰色）砷代表了一种有前途的层状材料，可用于制造电子设备和传感器。然而，用于调节其性质或通过共价官能化保护表面的合成方案是未知的。在此交流中，我们介绍了它的共价官能化，伴随着在紫外线辐射和六羰基铬存在下菱形六面体砷的剥落。在此修饰过程中，砷原子充当铬金属中心的配体。我们相信，这项研究为菱形少层砷的修饰提供了一种有前途的方法，并使其能够在电子设备，传感器和能源设备等各个领域中得到应用。