Control of Intermolecular Bonds by Deposition Rates at Room Temperature: 
Hydrogen Bonds versus Metal Coordination in Trinitrile Monolayers

Sirtl, Thomas; Schlögl, Stefan; Rastgoo-Lahrood, Atena; Jelic, Jelena; Neogi, Subhadip; Schmittel, Michael; Heckl, Wolfgang M.; Reuter, Karsten; Lackinger, Markus

doi:/10.1021/ja306834a

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Control of Intermolecular Bonds by Deposition Rates at Room Temperature: Hydrogen Bonds versus Metal Coordination in Trinitrile Monolayers

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Sirtl, T., Schlögl, S., Rastgoo-Lahrood, A., Jelic, J., Neogi, S., Schmittel, M., et al. (2013). Control of Intermolecular Bonds by Deposition Rates at Room Temperature: Hydrogen Bonds versus Metal Coordination in Trinitrile Monolayers. Journal of the American Chemical Society, 135(2), 691-695. doi:/10.1021/ja306834a.

Cite as: https://hdl.handle.net/21.11116/0000-000A-D32A-9

Abstract

Self-assembled monolayers of 1,3,5-tris(4′-biphenyl-4″-carbonitrile)benzene, a large functional trinitrile molecule, on the (111) surfaces of copper and silver under ultrahigh vacuum conditions were studied by scanning tunneling microscopy and low-energy electron diffraction. A densely packed hydrogen-bonded polymorph was equally observed on both surfaces. Additionally, deposition onto Cu(111) yielded a well-ordered metal-coordinated porous polymorph that coexisted with the hydrogen-bonded structure. The required coordination centers were supplied by the adatom gas of the Cu(111) surface. On Ag(111), however, the well-ordered metal-coordinated network was not observed. Differences between the adatom reactivities on copper and silver and the resulting bond strengths of the respective coordination bonds are held responsible for this substrate dependence. By utilizing ultralow deposition rates, we demonstrate that on Cu(111) the adatom kinetics plays a decisive role in the expression of intermolecular bonds and hence structure selection.