Jing Liu1,2, Jie Li1,3, Zhen Xu1, Xiong Zhou4, Qiang Xue1, Tianhao Wu1, Mingjun Zhong1, Ruoning Li1, Rong Sun4, Ziyong Shen1, Hao Tang5, Song Gao2,4,6, Bingwu Wang4, Shimin Hou1,3, Yongfeng Wang7,8,9. 1. Key Laboratory for the Physics and Chemistry of Nanodevices and Center for Carbon-based Electronics, Department of Electronics, Peking University, Beijing, China. 2. Division of Quantum State of Matter, Beijing Academy of Quantum Information Sciences, Beijing, China. 3. Peking University Information Technology Institute (Tianjin Binhai), Tianjin, China. 4. Beijing National Laboratory of Molecular Science, College of Chemistry and Molecular Engineering, Peking University, Beijing, China. 5. CEMES, UPR CNRS 8011, Toulouse Cedex 4, France. 6. Institute of Spin Science and Technology, South China University of Technology, Guangzhou, China. 7. Key Laboratory for the Physics and Chemistry of Nanodevices and Center for Carbon-based Electronics, Department of Electronics, Peking University, Beijing, China. yongfengwang@pku.edu.cn. 8. Division of Quantum State of Matter, Beijing Academy of Quantum Information Sciences, Beijing, China. yongfengwang@pku.edu.cn. 9. Institute of Spin Science and Technology, South China University of Technology, Guangzhou, China. yongfengwang@pku.edu.cn.
Abstract
The study of lanthanide (Ln)-transition-metal (TM) heterometallic clusters which play key roles in various high-tech applications is a rapid growing field of research. Despite the achievement of numerous Ln-TM cluster compounds comprising one Ln atom, the synthesis of Ln-TM clusters containing multiple Ln atoms remains challenging. Here, we present the preparation and self-assembly of a series of Au-bridged heterometallic clusters containing multiple cerium (Ce) atoms via on-surface coordination. By employing different pyridine and nitrile ligands, the ordered coordination assemblies of clusters containing 2, 3 and 4 Ce atoms bridged by Au adatoms are achieved on Au(111) and Au(100), as revealed by scanning tunneling microscopy. Density functional theory calculations uncover the indispensable role of the bridging Au adatoms in constructing the multi-Ce-containing clusters by connecting the Ce atoms via unsupported Ce-Au bonds. These findings demonstrate on-surface coordination as an efficient strategy for preparation and organization of the multi-Ln-containing heterometallic clusters.
The study of lanthanide (n class="Chemical">Ln)-transition-metal (TM) heterometallic clusters which play key roles in various high-tech applications is a rapid growing field of research. Despite the achievement of numerous Ln-TM cluster compounds comprising one Ln atom, the synthesis of Ln-TM clusters containing multiple Ln atoms remains challenging. Here, we present the preparation and self-assembly of a series of Au-bridged heterometallic clusters containing multiple cerium (Ce) atoms via on-surface coordination. By employing different pyridine and nitrile ligands, the ordered coordination assemblies of clusters containing 2, 3 and 4 Ce atoms bridged by Au adatomsare achieved on Au(111) and Au(100), as revealed by scanning tunneling microscopy. Density functional theory calculations uncover the indispensable role of the bridging Au adatoms in constructing the multi-Ce-containing clusters by connecting the Ce atoms via unsupported Ce-Au bonds. These findings demonstrate on-surface coordination as an efficient strategy for preparation and organization of the multi-Ln-containing heterometallic clusters.
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