基于全氟酞菁铜和碗烯双分子体系在银和石墨表面自组装行为的低温扫描隧道显微镜研究

引用本文: 郭瑞, 张嘉霖, 赵宋焘, 余小江, 钟舒, 孙硕, 李震宇, 陈伟. 基于全氟酞菁铜和碗烯双分子体系在银和石墨表面自组装行为的低温扫描隧道显微镜研究[J]. 物理化学学报, 2017, 33(3): 627-632. doi: 10.3866/PKU.WHXB201612051 shu

Citation: GUO Rui, ZHANG Jialin, ZHAO Songtao, YU Xiaojiang, ZHONG Shu, SUN Shuo, LI Zhenyu, CHEN Wei. LT-STM Investigation of the Self-Assembled F₁₆CuPc-Corannulene Binary System on Ag(111) and Grap[J]. Acta Physico-Chimica Sinica, 2017, 33(3): 627-632. doi: 10.3866/PKU.WHXB201612051 shu

基于全氟酞菁铜和碗烯双分子体系在银和石墨表面自组装行为的低温扫描隧道显微镜研究

郭瑞 ^1, ,
张嘉霖 ^1,2, ,
赵宋焘 ^3, ,
余小江 ^4, ,
钟舒 ^1, ,
孙硕 ^2, ,
李震宇 ^3, ,
陈伟 ^1,2,5,6,

1.
新加坡国立大学化学系, 新加坡 117543;
2.
新加坡国立大学物理系, 新加坡 117542;
3.
中国科学技术大学, 合肥微尺度物质科学国家实验室, 中国科学院量子信息与量子科技前沿卓越创新中心, 合肥 23026;
4.
新加坡国立大学, 新加坡同步加速器光源中心, 新加坡 117603;
5.
新加坡国立大学, 先进二维材料石墨烯研究中心, 新加坡 117546;
6.
新加坡国立大学苏州研究院, 江苏苏州 215123
基金项目:
国家重点基础研究发展规划项目（973）（2015CB856505）；新加坡教育部（MOE，Tier II，R143-000-652-112）；新加坡国家研发基金会（NRF，R143-001-608-281）；江苏省平台建设项目和新加坡国立大学苏州研究院资助

摘要: 由于其独特的分子构型和电子结构，碗烯被认为是组成有机分子电子器件的一种重要的结构单元。在不同金属表面上单一组分的碗烯或其衍生物进行自组装的行为，及其所形成自组装薄膜的电子结构已经被广泛研究。这里我们利用低温扫描隧道显微镜（LT-STM），对全氟酞菁铜和碗烯两种组分在高定向热解石墨和银（111）两种不同衬底上的自组装结构进行了报道。在石墨衬底上，全氟酞菁铜和碗烯分子间形成的氢键成为双分子网络结构能够形成的关键；同时，由于这种分子间氢键的存在，碗烯分子大多采取“开口朝下”的空间构型，以保证分子间氢键最大限度的形成。但在银衬底上观察到的碗烯分子则随机采取“开口向上”或“开口向下”两种构型，并没有一种优势构型的存在。我们认为此时银（111）衬底和有机分子间强烈的相互作用限制了碗烯两种构型之间的翻转，使得碗烯分子一旦被吸附就只能保持其原本的构型，从而导致了在结果上两种构型的随机分布。

关键词:

English

LT-STM Investigation of the Self-Assembled F₁₆CuPc-Corannulene Binary System on Ag(111) and Grap

1.
Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543, Singapore;
2.
Department of Physics, National University of Singapore, 2 Science Drive 3, 117542, Singapore;
3.
Hefei National Laboratory for Physical Sciences at the Microscale, CAS Centre for Excellence and Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, P. R. China;
4.
Singapore Synchrotron Light Source, National University of Singapore, 5 Research Link, 117603, Singapore;
5.
Center for Advanced 2D Materials and Graphene Research Center, National University of Singapore, 3 Science Drive 3, 117546, Singapore;
6.
National University of Singapore(Suzhou) Research Institute, Suzhou 215123, Jiangsu Province, P. R. China
Received Date: 29 September 2016
Revised Date: 02 December 2016
Fund Project:
The project was supported by the National Key Basic Research Program of China (973)(2015CB856505)

Abstract: Corannulene (COR) is considered a promising molecular building block for organic electronics owing to its intriguing geometrical and electronic properties. Intensive research efforts have been devoted to understanding the assembly behavior and electronic structure of COR and its derivatives on various metal surfaces via low-temperature scanning tunneling microscopy (LT-STM). Here we report the formation of binary molecular networks of copper hexadecafluorophthalocyanine (F₁₆CuPc)-COR self-assembled on the highly oriented pyrolytic graphite (HOPG) and Ag(111) substrates. Intermolecular hydrogen bonding between F₁₆CuPc and COR facilitates the formation of binary molecular networks on HOPG and further induces a preference for bowl-down configured COR molecules. This observed configuration preference disappears on Ag(111) substrate, where COR molecules lie on the substrate with their bowl openings pointing up and down randomly. We propose that strong interfacial interactions between the molecule and Ag(111) surface constrain the bowl inversion of the COR molecule, which thus retains its initial configuration upon adsorption.

Key words:

Molecular assembly
/ Binary molecular networks
/ Corannulene
/ Low-temperature scanning tunneling microscopy
/ Intermolecular hydrogen bonding

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基于全氟酞菁铜和碗烯双分子体系在银和石墨表面自组装行为的低温扫描隧道显微镜研究

English

LT-STM Investigation of the Self-Assembled F₁₆CuPc-Corannulene Binary System on Ag(111) and Grap

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通讯作者: 陈斌, bchen63@163.com

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基于全氟酞菁铜和碗烯双分子体系在银和石墨表面自组装行为的低温扫描隧道显微镜研究

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