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Journal Articles Physical Chemistry Chemical Physics Year : 2022

A one-dimensional high-order commensurate phase of tilted molecules

Abstract

We report on the formation of a high-order commensurate (HOC) structure of 5,14-dihydro-5,7,12,14-tetraazapentacene (DHTAP) molecules on the highly corrugated Cu(110)–(2 × 1)O surface. Scanning tunnelling microscopy shows that the DHTAP molecules form a periodic uniaxial arrangement in which groups of seven molecules are distributed over exactly nine substrate lattice spacings along the [[1 with combining macron]10] direction. DFT-calculations reveal that this peculiar arrangement is associated with different tilting of the seven DHTAP molecules within the quasi one-dimensional HOC unit cell. The orientational degree of freedom thus adds a new parameter, which can efficiently stabilize complex molecular structures on corrugated surfaces.
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hal-03736825 , version 1 (27-09-2022)

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Anthony Thomas, Thomas Leoni, Olivier Siri, Conrad Becker, Martin Unzog, et al.. A one-dimensional high-order commensurate phase of tilted molecules. Physical Chemistry Chemical Physics, 2022, 24 (16), pp.9118-9122. ⟨10.1039/d2cp00437b⟩. ⟨hal-03736825⟩
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