Theoretical insights into the adsorption of neutral, radical and anionic thiophenols on gold(111)

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dc.contributor.authorMiranda-Rojas, S.
dc.contributor.authorMunoz-Castro, Alvaro
dc.contributor.authorArratia-Perez, Ramiro
dc.contributor.authorMendizabal, Fernando
dc.date.accessioned2025-01-24T00:06:12Z
dc.date.available2025-01-24T00:06:12Z
dc.date.issued2013
dc.description.abstractThe interaction of thiol and thiolate containing molecules with gold (S-Au) has gained increasing interest because of its applications in molecular electronic devices and catalysis. In this context, the enhanced conductivity of thiophenol compared to alkanethiol represents an opportunity to develop more sensitive and selective gold-based devices by incorporating molecules with the aryl-thiol moiety into their structures. As has been proposed earlier, the thiol moiety is deprotonated after binding to gold, hence, we present here a comparative study of the S-Au bond strength between several neutral and deprotonated aromatic-sulfur systems in their anionic and radical forms with a detailed description of the nature of this interaction. The study was performed by means of computational chemistry methods, using a cluster of 42 Au atoms as a model of the Au(111) surface that allowed us to provide new chemical insights to control the S-Au interface interaction strength. Our results revealed that the thiophenols-gold interaction is mainly dispersive where the interaction energies range between 31 and 43 kcal mol(-1). The radical and anionic thiophenolates-gold interaction increases due to a strong charge transfer character, depicting interaction energies in the range of 50 to 55 kcal mol(-1) and 62 to 92 kcal mol(-1), respectively. These results suggest that for the anionic thiophenolate the binding strength can be tailored according to the electron-donor capabilities of the ligand which in turn can be finely tuned by several substituents. Our results are of possible impact for the design of new devices.
dc.fuente.origenWOS
dc.identifier.doi10.1039/c3cp53591f
dc.identifier.eissn1463-9084
dc.identifier.issn1463-9076
dc.identifier.urihttps://doi.org/10.1039/c3cp53591f
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/101860
dc.identifier.wosidWOS:000326747200048
dc.issue.numero46
dc.language.isoen
dc.pagina.final20370
dc.pagina.inicio20363
dc.revistaPhysical chemistry chemical physics
dc.rightsacceso restringido
dc.titleTheoretical insights into the adsorption of neutral, radical and anionic thiophenols on gold(111)
dc.typeartículo
dc.volumen15
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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