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Role of the Structure and Reactivity of Cu and Ag Surfaces in the Formation of a 2D Metal–Hexahydroxytriphenylene Network

Abstract : We have investigated the role played by the atomic structure and reactivity of the supporting Ag(111) and Cu(111) surfaces on the formation of 2D metal−organic networks (2D-MONs) involving metal adatom clusters spawned by these two surfaces. While the hexahydroxytriphenylene (HHTP) molecule forms complexes with Ag 3 and Cu 3 adatom clusters on, respectively, the Ag(111) and Cu(111) surfaces, an extended order is only observed in the 2D-MON on Ag(111). By combining scanning tunneling microscopy measurements, density functional theory calculations, and microscopy image simulations, we show that the formation of Ag−HHTP metal−organic complexes is structurally compatible with a periodic arrangement of HHTP on the Ag(111) surface. In contrast, on Cu(111), tightly bonded and localized Cu−HHTP motifs are stabilized by the interaction of Cu adclusters with HHTP. However, they cannot match the surface structure of Cu(111) to form an extended 2D-MON. We observed that the formation of large 2D-MON domains on a metallic surface is only possible when the periodicity of the adsorbed surface assembly is weakly perturbed by the addition of metal adclusters that reinforced the bonding.
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Submitted on : Friday, July 30, 2021 - 2:30:12 PM
Last modification on : Wednesday, September 15, 2021 - 1:43:34 PM

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Alain Rochefort, Loranne Vernisse, Ana Cristina Gómez-Herrero, Carlos Sánchez-Sánchez, José Martín-Gago, et al.. Role of the Structure and Reactivity of Cu and Ag Surfaces in the Formation of a 2D Metal–Hexahydroxytriphenylene Network. Journal of Physical Chemistry C, American Chemical Society, 2021, 125 (31), pp.17333-17341. ⟨10.1021/acs.jpcc.1c03976⟩. ⟨hal-03310454⟩

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