Driving multi-step regioselectivity in on-surface polymer synthesis by molecular coverage
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F25%3A00642495" target="_blank" >RIV/68378271:_____/25:00642495 - isvavai.cz</a>
Result on the web
<a href="https://hdl.handle.net/11104/0374494" target="_blank" >https://hdl.handle.net/11104/0374494</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1002/anie.202512575" target="_blank" >10.1002/anie.202512575</a>
Alternative languages
Result language
angličtina
Original language name
Driving multi-step regioselectivity in on-surface polymer synthesis by molecular coverage
Original language description
On-surface synthesis has revolutionized the design of low-dimensional organic nanomaterials, introducing unprecedented families of compounds while offering precise control over their structural and functional properties. A critical challenge in this field is achieving regioselective control over covalent bond formation, which is essential for tailoring polymerization processes. Here, we demonstrate a novel approach toward regioselective polymerization on Au(111) using a dicyclopentaanthracene precursor, an acene derivative that comprise two terminal indene moieties. Through a combination of scanning tunneling microscopy, non-contact atomic force microscopy, and density functional theory calculations, we reveal a molecular coverage-dependent regioselective homocoupling mechanism. At low coverage, one-dimensional polymers formed via indenyl couplings in anti-configuration dominate, involving both five-membered rings of the precursor. Increasing the coverage to half a monolayer shifts the regioselectivity, yielding a quasi-1D staircase polymer through indenyl couplings that engage only one five-membered ring of each precursor. At higher coverages, a two-dimensional porous network emerges, driven by the activation of the four benzylic positions of the molecular precursor. Our findings highlight the ability to steer regioselectivity and, consequently, polymer dimensionality by controlling molecular coverage, significantly advancing the fields of on-surface synthesis and polymer science.
Czech name
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Czech description
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Classification
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.)
Result continuities
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
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Angewandte Chemie - International Edition
ISSN
1433-7851
e-ISSN
1521-3773
Volume of the periodical
64
Issue of the periodical within the volume
48
Country of publishing house
DE - GERMANY
Number of pages
7
Pages from-to
e202512575
UT code for WoS article
001586775600001
EID of the result in the Scopus database
2-s2.0-105018491244