期刊
CHEMICAL COMMUNICATIONS
卷 56, 期 97, 页码 15309-15312出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0cc06865a
关键词
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资金
- Comunidad de Madrid [Y2018/NMT-4783, IND-12535]
- EC FP7-PEOPLE-2011-COFUND AMAROUT II
- Spanish Ramon y Cajal programme [RYC-2012-11133]
- Spanish MINECO [FIS 2013-40667-P, FIS 2015-67287-P]
- Ministerio de Ciencia, Innovacion y Universidades
- MINECO of Spain [CTQ2017-83531-R, CTQ2016-81911-REDT]
- Severo Ochoa Programme for Centers of Excellence in RD (MINECO) [SEV-2016-0686]
- Praemium Academie of the Academy of Science of the Czech Republic, GACR [18-09914S]
On-surface synthesis has recently become an essential approach toward the formation of carbon-based nanostructures. Special emphasis is set on the synthesis of pi-conjugated polymers taking into consideration their relevance and potential in organic electronics, optoelectronics and spintronics. Here, we report the on-surface synthesis of conjugated ladder polymers consisting of pentacene units doubly-linked via ethynylene-like bonds on the Au(111) surface under ultra-high vacuum conditions. To this aim, we have sublimed pentacene-like precursors equipped with four :CBr2 functional groups to steer the desired reaction upon annealing on the surface. The atomically precise structure of the obtained polymers has been unambiguously characterized via low-temperature scanning tunneling microscopy and non-contact atomic force microscopy. In addition, scanning tunneling spectroscopy complemented with density-functional theory calculations reveal the narrow bandgap of the polymer. Our results provide potential for the synthesis of pi-conjugated polymers with prospects in functional carbon-based nanomaterials that exploit multiple connections between molecular backbones.
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