Self-assembled monolayers of N-heterocyclic olefins on Au(111)

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dc.contributor.authorBerg, Iris
dc.contributor.authorSchio, Luca
dc.contributor.authorReitz, Justus
dc.contributor.authorMolteni, Elena
dc.contributor.authorLahav, Linoy
dc.contributor.authorBolaños, Carolina Gutiérrez
dc.contributor.authorGoldoni, Andrea
dc.contributor.authorGrazioli, Cesare
dc.contributor.authorFratesi, Guido
dc.contributor.authorHansmann, Max M.
dc.contributor.authorFloreano, Luca
dc.contributor.authorGross, Elad
dc.date.accessioned2025-04-25T13:37:38Z
dc.date.available2025-04-25T13:37:38Z
dc.date.issued2023-09-24
dc.description.abstractSelf-assembled monolayers (SAMs) of N-heterocyclic olefins (NHOs) have been prepared on Au(111) and their thermal stability, adsorption geometry, and molecular order were characterized by X-ray photoelectron spectroscopy, polarized X-ray absorption spectroscopy, scanning tunneling microscopy (STM), and density functional theory (DFT) calculations. The strong σ-bond character of NHO anchoring to Au induced high geometrical flexibility that enabled a flat-lying adsorption geometry via coordination to a gold adatom. The flat-lying adsorption geometry was utilized to further increase the surface interaction of the NHO monolayer by backbone functionalization with methyl groups that induced high thermal stability and a large impact on work-function values, which outperformed that of N-heterocyclic carbenes. STM measurements, supported by DFT modeling, identified that the NHOs were self-assembled in dimers, trimers, and tetramers constructed of two, three, and four complexes of NHO−Au-adatom. This self-assembly pattern was correlated to strong NHO−Au interactions and steric hindrance between adsorbates, demonstrating the crucial influence of the carbon-metal σ-bond on monolayer properties.en
dc.identifier.urihttp://hdl.handle.net/2003/43680
dc.identifier.urihttp://dx.doi.org/10.17877/DE290R-25453
dc.language.isoen
dc.relation.ispartofseriesAngewandte Chemie. International edition; 62(46)
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectN-Heterocyclic Olefinsen
dc.subjectScanning Tunneling Microscopyen
dc.subjectSelf-Assembled Monolayersen
dc.subjectSurface Chemistryen
dc.subjectX-Ray Absorption Spectroscopyen
dc.subject.ddc540
dc.titleSelf-assembled monolayers of N-heterocyclic olefins on Au(111)en
dc.typeText
dc.type.publicationtypeResearchArticle
dcterms.accessRightsopen access
eldorado.openaire.projectidentifierinfo:eu-repo/grantAgreement/EC/HE/101077332/EU/NAME/CC-CHARGED
eldorado.secondarypublicationtrue
eldorado.secondarypublication.primarycitationI. Berg, L. Schio, J. Reitz, E. Molteni, L. Lahav, C. G. Bolaños, A. Goldoni, C. Grazioli, G. Fratesi, M. M. Hansmann, L. Floreano, E. Gross, Angew. Chem. Int. Ed. 2023, 62, e202311832.
eldorado.secondarypublication.primaryidentifierhttps://doi.org/10.1002/anie.202311832

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