On-surface synthesis of non-benzenoid conjugated polymers by selective atomic rearrangement of ethynylarenes

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15640%2F22%3A73618708" target="_blank" >RIV/61989592:15640/22:73618708 - isvavai.cz</a>
Result on the web
<a href="https://pubs.rsc.org/en/content/articlelanding/2023/SC/D2SC04722E" target="_blank" >https://pubs.rsc.org/en/content/articlelanding/2023/SC/D2SC04722E</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1039/d2sc04722e" target="_blank" >10.1039/d2sc04722e</a>

Result language
angličtina
Original language name
On-surface synthesis of non-benzenoid conjugated polymers by selective atomic rearrangement of ethynylarenes
Original language description
ere, we report a new on-surface synthetic strategy to precisely introduce five-membered units into conjugated polymers from specifically designed precursor molecules that give rise to low-bandgap fulvalene-bridged bisanthene polymers. The selective formation of non-benzenoid units is finely controlled by the annealing parameters, which govern the initiation of atomic rearrangements that efficiently transform previously formed diethynyl bridges into fulvalene moieties. The atomically precise structures and electronic properties have been unmistakably characterized by STM, nc-AFM, and STS and the results are supported by DFT theoretical calculations. Interestingly, the fulvalene-bridged bisanthene polymers exhibit experimental narrow frontier electronic gaps of 1.2 eV on Au(111) with fully conjugated units. This on-surface synthetic strategy can potentially be extended to other conjugated polymers to tune their optoelectronic properties by integrating five-membered rings at precise sites.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
21002 - Nano-processes (applications on nano-scale); (biomaterials to be 2.9)

Project
<a href="/en/project/EF16_019%2F0000754" target="_blank" >EF16_019/0000754: Nanotechnologies for Future</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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