Wei Tao, Liu Xin, Kohring Malte, Al-Fogra Sabrin, Moritz Michael, Hemmeter Daniel, Paap Ulrike, Papp Christian, Steinrück Hans-Peter, Bachmann Julien, Weber Heiko B, Hauke Frank, Hirsch Andreas
Department of Chemistry and Pharmacy & Joint Institute of Advance Materials and Processes (ZMP), Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Nikolaus-Fiebiger-Strasse 10, 91058, Erlangen, Germany.
Chemistry of Thin Film Materials, Department of Chemistry and Pharmacy, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Cauerstr. 3, 91058, Erlangen, Germany.
Angew Chem Int Ed Engl. 2022 Aug 15;61(33):e202201169. doi: 10.1002/anie.202201169. Epub 2022 Jul 5.
The sequential vertical polyfunctionalization of 2D addend-patterned graphene is still elusive. Here, we report a practical realization of this goal via a "molecular building blocks" approach, which is based on a combination of a lithography-assisted reductive functionalization approach and a post-functionalization step to sequentially and controllably link the molecular building blocks ethylpyridine, cis-dichlorobis(2,2'-bipyridyl)ruthenium, and triphenylphosphine (4-methylbenzenethiol, respectively) on selected lattice regions of a graphene matrix. The assembled 2D hetero-architectures are unambiguously characterized by various spectroscopic and microscopic measurements, revealing the stepwise stacking of the molecular building blocks on the graphene surface. Our method overcomes the current limitation of a one-layer-only binding to the graphene surface and opens the door for a vertical growth in the z-direction.
二维加数图案化石墨烯的连续垂直多官能化仍然难以实现。在这里，我们报告了通过“分子构建块”方法实现这一目标的实际情况，该方法基于光刻辅助还原功能化方法和后功能化步骤的组合，以在石墨烯基质的选定晶格区域上顺序可控地连接分子构建块乙基吡啶、顺式二氯双（2,2'-联吡啶）钌和三苯基膦（分别为4-甲基苯硫醇）。通过各种光谱和显微镜测量对组装的二维异质结构进行了明确表征，揭示了分子构建块在石墨烯表面的逐步堆叠。我们的方法克服了目前仅与石墨烯表面单层结合的限制，并为在z方向上的垂直生长打开了大门。
