Two-Dimensional Self-Assembly Driven by Intermolecular Hydrogen Bonding in Benzodi-7-azaindole Molecules on Au(111)

The journal of physical chemistry. C, Nanomaterials and interfaces(2023)

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摘要
The control of molecular structures at the nanoscaleplays a criticalrole in the development of materials and applications. The adsorptionof a polyheteroaromatic molecule with hydrogen bond donor and acceptorsites integrated in the conjugated structure itself, namely, benzodi-7-azaindole(BDAI), has been studied on Au(111). Intermolecular hydrogenbonding determines the formation of highly organized linear structureswhere surface chirality, resulting from the 2D confinement of thecentrosymmetric molecules, is observed. Moreover, the structural featuresof the BDAI molecule lead to the formation of two differentiatedarrangements with extended brick-wall and herringbone packing. A comprehensiveexperimental study that combines scanning tunneling microscopy, high-resolutionX-ray photoelectron spectroscopy, near-edge X-ray absorption finestructure spectroscopy, and density functional theory theoreticalcalculations has been performed to fully characterize the 2D hydrogen-bondeddomains and the on-surface thermal stability of the physisorbed material.
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关键词
intermolecular hydrogen bonding,molecules,two-dimensional,self-assembly
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