| 名 稱： |
同濟-科思創傑出學者講座：Tetraphenylethylene (TPE) – based macrocycles and oligomers: (anti) aromaticity and Kondo physics |
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| 姓 名： |
林念 |
| 聯系電話： |
18621332550 |
| 會議主題： |
德才館441 |
| 預約日期： |
2024-05-13 |
| 開始時間： |
13:00 |
| 結束時間： |
17:00 |
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| 地 點： |
嘉定校區德才館 |
主講人照片 |
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| 主講人簡介： |
Nian Lin is a Professor in the Department of Physics, Hong Kong University of Science and Technology (HKUST). He obtained his Ph.D. from HKUST in 1997 and carried out his postdoctoral research at Linkoping University, Sweden and at Max-Planck-Institute for Solid State Research, Germany. The major research interests of Prof. Lin are the synthesis and characterization of 2D metal-organic quantum materials, charge transport and energy conversion at single molecules. See http://people.phys.ust.hk/phnlin/ for further details.
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| 報告内容簡介： |
In the first part of this talk, I will present the synthesis of four-, six- and eight-membered tetraphenylethylene (TPE)-based macrocycles on Ag(111) via on-surface Ullmann coupling reactions. Their unique chemical and physical properties, such as intrinsic inner cavities and aromaticity/antiaromaticity make these systems appealing building blocks for functional supramolecular materials. The as-synthesized macrocycles are spontaneously segregated on the surface and self-assemble as large-area two-dimensional mono-component supramolecular crystals. Combined in-situ characterized by scanning tunneling spectroscopic and computational analysis evidence that the macrocycles undergo structural and orbital symmetry breaking due to extended conjugation in the macrocycles. In the second part, I will show that TPE-based oligomers containing open-shell radicals represent a unique platform for exploring the quantum critical point in Kondo systems. The competition of inter-radical antiferromagnetic coupling and the Kondo screening leads to Kondo chains, which offers opportunities to realize artificial heavy fermion systems using organic radicals.
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