Abad José, Martínez José I, Gómez Paula, Más-Montoya Miriam, Rodríguez Luis, Cossaro Albano, Verdini Alberto, Floreano Luca, Martín-Gago José A, Curiel David, Méndez Javier
Applied Physics Department, Technical University of Cartagena, c/ Dr. Fleming s/n, 30202 Cartagena, Spain.
Department of Low Dimensional Systems, Institute of Materials Science of Madrid (ICMM-CSIC), c/ Sor Juana Inés de la Cruz 3, 28049 Madrid, Spain.
J Phys Chem C Nanomater Interfaces. 2023 Jun 8;127(24):11591-11599. doi: 10.1021/acs.jpcc.3c01640. eCollection 2023 Jun 22.
The control of molecular structures at the nanoscale plays a critical role in the development of materials and applications. The adsorption of a polyheteroaromatic molecule with hydrogen bond donor and acceptor sites integrated in the conjugated structure itself, namely, benzodi-7-azaindole (), has been studied on Au(111). Intermolecular hydrogen bonding determines the formation of highly organized linear structures where surface chirality, resulting from the 2D confinement of the centrosymmetric molecules, is observed. Moreover, the structural features of the molecule lead to the formation of two differentiated arrangements with extended brick-wall and herringbone packing. A comprehensive experimental study that combines scanning tunneling microscopy, high-resolution X-ray photoelectron spectroscopy, near-edge X-ray absorption fine structure spectroscopy, and density functional theory theoretical calculations has been performed to fully characterize the 2D hydrogen-bonded domains and the on-surface thermal stability of the physisorbed material.
在纳米尺度上控制分子结构在材料和应用的发展中起着关键作用。我们研究了一种在共轭结构本身中集成了氢键供体和受体位点的多杂芳族分子，即苯并二-7-氮杂吲哚（）在Au(111)上的吸附情况。分子间氢键决定了高度有序的线性结构的形成，在这种结构中，观察到了由中心对称分子的二维限制所导致的表面手性。此外，该分子的结构特征导致形成了两种不同的排列方式，即扩展的砖墙式堆积和人字形堆积。我们进行了一项综合实验研究，结合扫描隧道显微镜、高分辨率X射线光电子能谱、近边X射线吸收精细结构光谱以及密度泛函理论理论计算，以全面表征二维氢键域和物理吸附材料的表面热稳定性。
