侯建国.逐步走近构建和创造全新物质——通过单分子选键化学控制单个分子磁性[J].中国科学院院刊,2005,(6):54-57.

侯建国
中国科学技术大学合肥微尺度物质科学国家实验室 合肥230026
Jian Guo,Hou
Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei 230026

         扫描隧道显微术;单分子;选键化学;钴酞菁;磁性

        Scanning tunneling microscopy;single molecules;bond selective chemistry;cobalt phthalocyanine;magnetic property

        利用低温超高真空扫描隧道显微镜,对吸附于金表面的单个钴酞菁分子进行单分子选键化学“手术”,成功“剪裁”了分子外围的氢原子,并使其与金属表面形成稳定的化学键。该成果发表在Science上,审稿人给予高度评价,并邀请美国专家撰写专文介绍和评述该成果。

        We report the magnetic moment of a single adsorbed magnetic atom can be manipulated by altering its chemical environment. Using a scanning tunneling microscope (STM) as a probe, we observed no Kondo effects when cobalt phthalocyanine (CoPc) was adsorbed on the (111) surface of gold. However, when we used the STM tip to dehydrogenate the Pc ligand, the local magnetic moment of the Co ion was recovered, and it interacted with surface Au electrons to produce a Kondo effect with a high Kondo temperature.