南开大学孙忠明团队合成了一个全金属富勒烯——[K@Au₁₂Sb₂₀] ^5- 。相关研究成果于2023年11月17日发表于国际一流学术期刊《科学》。

C60富勒烯分子以其独特的近球形结构吸引了人们的极大兴趣。相比之下，所有金属的对应物都是难以捉摸的，这是由于由非碳元素组成的类富勒烯团簇通常存在不稳定性，导致更紧凑的几何形状，需要多个嵌入的原子或外部配体来稳定。

该文中，研究人员提出了使用湿化学方法合成全金属富勒烯簇合物[K@Au₁₂Sb₂₀]^5-。通过单晶x射线衍射确定了团簇的结构，揭示了由20个锑原子组成的富勒烯框架。理论计算进一步表明，这种独特的团簇表现出芳香行为。

附：英文原文

Title: An all-metal fullerene: [K@Au12Sb20]5

Author: Yu-He Xu, Wen-Juan Tian, Alvaro Muoz-Castro, Gernot Frenking, Zhong-Ming Sun

Issue&Volume: 2023-11-17

Abstract: The C60 fullerene molecule has attracted tremendous interest for its distinctive nearly spherical structure. By contrast, all-metal counterparts have been elusive: Fullerene-like clusters composed of noncarbon elements typically suffer from instability, resulting in more compact geometries that require multiple embedded atoms or external ligands for stabilization. In this work, we present the synthesis of an all-metal fullerene cluster, [K@Au12Sb20]5, using a wet-chemistry method. The cluster's structure was determined by single crystal x-ray diffraction, which revealed a fullerene framework consisting of 20 antimony atoms. Theoretical calculations further indicate that this distinct cluster exhibits aromatic behavior.

DOI: adj6491

Source: https://www.science.org/doi/10.1126/science.adj6491