Mohammed Mohammed S G, Lawrence James, García Fátima, Brandimarte Pedro, Berdonces-Layunta Alejandro, Pérez Dolores, Sánchez-Portal Daniel, Peña Diego, de Oteyza Dimas G
Donostia International Physics Center (DIPC) San Sebastián Spain
Centro de Física de Materiales (CSIC-UPV/EHU) San Sebastián Spain.
Nanoscale Adv. 2021 Mar 8;3(8):2351-2358. doi: 10.1039/d1na00126d. eCollection 2021 Apr 20.
Combining on-surface synthetic methods with the power of scanning tunneling microscopy to characterize novel materials at the single molecule level, we show how to steer the reactivity of one anthracene-based precursor towards different product nanostructures. Whereas using a Au(111) surface with three-fold symmetry results in the dominant formation of a starphene derivative, the two-fold symmetry of a reconstructed Au(110) surface allows the selective growth of non-benzenoid linear conjugated polymers. We further assess the electronic properties of each of the observed product structures tunneling spectroscopy and DFT calculations, altogether advancing the synthesis and characterization of molecular structures of notable scientific interest that have been only scarcely investigated to date, as applies both to starphenes and to non-benzenoid conjugated polymers.
将表面合成方法与扫描隧道显微镜在单分子水平表征新型材料的能力相结合，我们展示了如何引导一种基于蒽的前驱体的反应性，使其生成不同的产物纳米结构。使用具有三重对称性的Au(111)表面时，主要形成星烯衍生物；而重构的具有二重对称性的Au(110)表面则允许选择性生长非苯型线性共轭聚合物。我们还通过隧穿光谱和密度泛函理论计算进一步评估了每种观察到的产物结构的电子性质，全面推动了对具有显著科学意义的分子结构的合成与表征，这些结构迄今为止很少被研究，无论是星烯还是非苯型共轭聚合物都是如此。
