Two-dimensional, ultrathin, robust, and fully π-conjugated organic nanomaterials are highly desirable for application in various fields due to their unique photoelectric characteristics and great number of exposed active sites. However, such matters combining excellent stability, full π-conjugation and adjustability are rare, which has become a bottleneck for their practical application. Herein, we present a novel kind of diyne-linked polymetalloporphyrin nanosheet featuring permanent porosity and full π-conjugation, which exhibits a high-aspect-ratio, outstanding stability and convenient tailoring for electronic structures. Importantly, the novel nanosheets with monodisperse nickel atoms were found to be outstanding heterogeneous catalyst with unprecedented catalytic activity and selectivity for 4-nitrophenol reduction to 4-aminophenol under mild conditions. The findings recommend that diyne-linked polymetalloporphyrin nanosheets may offer new platforms for the conversion of photoelectricity and energy in the future.

二维、超薄、坚固且完全π共轭的有机纳米材料因其独特的光电特性和大量暴露的活性位点而在各个领域得到广泛应用。然而，这种兼具优异稳定性、全π共轭性和可调节性的物质并不多见，这已成为其实际应用的瓶颈。在此，我们提出了一种新型的二炔连接的多金属卟啉纳米片，具有永久孔隙率和完全 π 共轭，具有高纵横比、出色的稳定性和方便的电子结构定制。重要的，发现具有单分散镍原子的新型纳米片是出色的多相催化剂，具有前所未有的催化活性和选择性，可在温和条件下将 4-硝基苯酚还原为 4-氨基苯酚。研究结果表明，二炔连接的多金属卟啉纳米片可能为未来的光电和能量转换提供新的平台。