Metalation of 2HTCNPP on Ag(111) with Zn: Evidence for the Sitting atop Complex at Room Temperature.
SAT complex
metalation
porphyrinoids
scanning tunneling microscopy
surface chemistry
Journal
Chemphyschem : a European journal of chemical physics and physical chemistry
ISSN: 1439-7641
Titre abrégé: Chemphyschem
Pays: Germany
ID NLM: 100954211
Informations de publication
Date de publication:
16 Feb 2021
16 Feb 2021
Historique:
received:
23
10
2020
revised:
04
12
2020
pubmed:
8
12
2020
medline:
8
12
2020
entrez:
7
12
2020
Statut:
ppublish
Résumé
We study the interaction and metalation reaction of a free base 5,10,15,20-terakis(4-cyanophenyl)porphyrin (2HTCNPP) with post-deposited Zn atoms and the targeted reaction product Zn-5,10,15,20-terakis(4-cyanophenyl)porphyrin (ZnTCNPP) on a Ag(111) surface. The investigations are performed with scanning tunneling microscopy at room temperature after Zn deposition and subsequent heating. The goal is to obtain further insights in the metalation reaction and the influence of the cyanogroups on this reaction. The interaction of 2HTCNPP with post-deposited Zn leads to the formation of three different 2D ordered island types that coexist on the surface. All contain a new species with a bright appearance, which increases with the amount of post-deposited Zn. We attribute this to metastable SAT ("sitting atop") complexes formed by Zn and the macrocycle, that is, an intermediate in the metalation reaction to ZnTCNPP, which occurs upon heating to 500 K. Interestingly, the activation barrier for the successive reaction of the SAT complex to the metalated ZnTCNPP species can also be overcome by a voltage pulse applied to the STM tip.
Identifiants
pubmed: 33285027
doi: 10.1002/cphc.202000883
pmc: PMC7986197
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
396-403Subventions
Organisme : German Research Foundation (DFG)
ID : FOR 1878 (funCOS)
Organisme : Collaborative Research Center SFB 953
ID : 182849149
Organisme : Friedrich-Alexander-Universität Erlangen-Nürnberg
Organisme : São Paulo Research Foundation (FAPESP)
ID : 2007/54829-5
Organisme : São Paulo Research Foundation (FAPESP)
ID : 2007/08244-5
Organisme : DAAD
Organisme : CAPES (Brazil)
Organisme : Brazilian-German collaborative project PROBRAL
ID : 1925/2016
Informations de copyright
© 2020 The Authors. ChemPhysChem published by Wiley-VCH GmbH.
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