Designing highly delocalized solitons by harnessing the structural parity of π-conjugated polymers

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F25%3A00599756" target="_blank" >RIV/68378271:_____/25:00599756 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1038/s44160-024-00665-8" target="_blank" >https://doi.org/10.1038/s44160-024-00665-8</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1038/s44160-024-00665-8" target="_blank" >10.1038/s44160-024-00665-8</a>

Result language
angličtina
Original language name
Designing highly delocalized solitons by harnessing the structural parity of π-conjugated polymers
Original language description
π-Conjugated polymers are a class of materials featuring an alternation of single and double bonds along their backbone, a configuration that can result in delocalized π-electrons. The unique electronic structure of these polymers makes them vital in applications such as organic electronics, solar cells and light-emitting diodes. A key feature in such materials is the emergence of topological quasiparticles, termed solitons, which are crucial for their observed high electrical conductivity. By using on-surface synthesis, we present a chemical reaction based on the regio- and stereoselective coupling of indenyl moieties for fabricating π-conjugated acenoindenylidene polymers, which feature a longitudinal polyacetylene backbone, on a Au(111) surface. The relationship between structural parity and electronic properties is investigated. We discover that odd-membered polymers exhibit an in-gap soliton state, which, due to their low bandgaps, spatially extends several nanometres along the longitudinal polyacetylene backbone. Our findings pave the way for the design of π-conjugated polymers that are able to host intrinsic solitons through chemical design by exploiting structural parity, without the need for external doping.
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
10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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