Decoupling chemically active 2D molecular overlayers from the substrate: chlorophenyl porphyrins on graphene/Ir(111)
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F23%3A00583161" target="_blank" >RIV/68378271:_____/23:00583161 - isvavai.cz</a>
Result on the web
<a href="https://hdl.handle.net/11104/0351153" target="_blank" >https://hdl.handle.net/11104/0351153</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1021/acs.jpcc.3c00235" target="_blank" >10.1021/acs.jpcc.3c00235</a>
Alternative languages
Result language
angličtina
Original language name
Decoupling chemically active 2D molecular overlayers from the substrate: chlorophenyl porphyrins on graphene/Ir(111)
Original language description
The synthesis of atomically precise chemically active 2D molecular overlayers may be hindered by chemical interactions with the underlying substrate, especially when based on chlorophenyl porphyrins. At the same time, the chlorination of graphene, i.e., the covalent bonding of chlorine atoms with sp2 carbon atoms, is known to have a significant influence on the electronic properties of pristine graphene. In this study, we deposit a chlorinated porphyrin molecule, namely 5,10,15,20-tetrakis(4-chlorophenyl)porphyrin (Cl4TPP), on graphene/Ir(111). Employing a combined experimental and theoretical approach, we demonstrate that the porphyrin layer physisorbed on graphene self-assembles into a periodic square-like arrangement. This carpet-like growth is unperturbed by the step edges of the substrate, neither in its periodicity nor in its orientation. In addition, the molecular overlayer is thermally stable and does not alter the electronic properties of graphene. Remarkably, we show that Cl4TPP does not experience a dechlorination reaction with the underlying substrate, even after postdeposition annealing temperatures as high as 550 K. Moreover, postdeposition annealing at 700 K suggests the Cl4TPP molecules desorb intact without affecting graphene’s electronic properties. In so doing, we demonstrate the effectiveness of graphene physisorbed on Ir(111) to both promote the formation and preserve the properties of chemically reactive 2D overlayers based on chlorophenyl porphyrins. These results show physisorbed graphene’s potential as a general templating material for the formation of highly reactive self-assembled 2D overlayers.
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
10301 - Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Physical Chemistry C
ISSN
1932-7447
e-ISSN
1932-7455
Volume of the periodical
127
Issue of the periodical within the volume
18
Country of publishing house
US - UNITED STATES
Number of pages
8
Pages from-to
8751-8758
UT code for WoS article
000984954800001
EID of the result in the Scopus database
2-s2.0-85156275533