期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 59, 期 3, 页码 1334-1339出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201913024
关键词
graphene nanoribbon (GNR); hybrid nanostructures; on-surface synthesis; porphyrin; Ullmann-type coupling
资金
- Spanish MICINN [CTQ2017-85393-P]
- Severo Ochoa Programme for Centres of Excellence in RD (MINECO) [SEV2016-0686]
- Swiss National Science Foundation [200020_182015, IZLCZ2_170184]
- NCCR MARVEL - Swiss National Science Foundation [51NF40-182892]
- Swiss Supercomputing Center (CSCS) [s904]
- EMPAPOSTDOCS-II programme under the Marie Sklodowska-Curie grant [754364]
- Marie Curie Actions (MSCA) [754364] Funding Source: Marie Curie Actions (MSCA)
- Swiss National Science Foundation (SNF) [IZLCZ2_170184] Funding Source: Swiss National Science Foundation (SNF)
On-surface synthesis offers a versatile approach to prepare novel carbon-based nanostructures that cannot be obtained by conventional solution chemistry. Graphene nanoribbons (GNRs) have potential for a variety of applications. A key issue for their application in molecular electronics is in the fine-tuning of their electronic properties through structural modifications, such as heteroatom doping or the incorporation of non-benzenoid rings. In this context, the covalent fusion of GNRs and porphyrins (Pors) is a highly appealing strategy. Herein we present the selective on-surface synthesis of a Por-GNR hybrid, which consists of two Pors connected by a short GNR segment. The atomically precise structure of the Por-GNR hybrid has been characterized by bond-resolved scanning tunneling microscopy (STM) and noncontact atomic force microscopy (nc-AFM). The electronic properties have been investigated by scanning tunneling spectroscopy (STS), in combination with DFT calculations, which reveals a low electronic gap of 0.4 eV.
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