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

TitleLT-STM Investigation of the Self-Assembled F16CuPc-Corannulene Binary System on Ag(111) and Graphite Surfaces
Publication TypeJournal Article
Year of Publication2017
AuthorsRui, Guo, Jialin Zhang, Songtao Zhao, Xiaojiang Yu, Shu Zhong, Shuo Sun, Zhenyu Li, and Wei Chen
JournalActa Phys.-Chim. Sin.
Volume33
Pagination627–632
Date Published03/2017
ISSN1000-6818
KeywordsBinary molecular networks, buckybowls, Corannulene, coronene, cu(110), fivefold-symmetric molecules, interface, Intermolecular hydrogen bonding, Low-temperature scanning, metal-surfaces, Molecular assembly, networks, phase, tunneling microscopy
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.

DOI10.3866/PKU.WHXB201612051

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