Knecht Peter, Meier Dennis, Reichert Joachim, Duncan David A, Schwarz Martin, Küchle Johannes T, Lee Tien-Lin, Deimel Peter S, Feulner Peter, Allegretti Francesco, Auwärter Willi, Médard Guillaume, Seitsonen Ari Paavo, Barth Johannes V, Papageorgiou Anthoula C
Physics Department E20, Technical University of Munich, James Franck Straße 1, 85748, Garching, Germany.
Diamond Light Source, Harwell Science and Innovation Campus, Didcot, OX11 0QX, UK.
Angew Chem Int Ed Engl. 2022 Dec 5;61(49):e202211877. doi: 10.1002/anie.202211877. Epub 2022 Nov 2.
Ru-porphyrins act as convenient pedestals for the assembly of N-heterocyclic carbenes (NHCs) on solid surfaces. Upon deposition of a simple NHC ligand on a close packed Ru-porphyrin monolayer, an extraordinary phenomenon can be observed: Ru-porphyrin molecules are transferred from the silver surface to the next molecular layer. We have investigated the structural features and dynamics of this portering process and analysed the associated binding strengths and work function changes. A rearrangement of the molecular layer is induced by the NHC uptake: the NHC selective binding to the Ru causes the ejection of whole porphyrin molecules from the molecular layer on silver to the layer on top. This reorganisation can be reversed by thermally induced desorption of the NHC ligand. We anticipate that the understanding of such mass transport processes will have crucial implications for the functionalisation of surfaces with carbenes.
钌卟啉可作为在固体表面组装氮杂环卡宾（NHCs）的便捷支撑物。在紧密堆积的钌卟啉单层上沉积一个简单的NHC配体时，会观察到一种非凡的现象：钌卟啉分子从银表面转移到下一个分子层。我们研究了这种搬运过程的结构特征和动力学，并分析了相关的结合强度和功函数变化。NHC的吸收会引起分子层的重排：NHC与钌的选择性结合导致整个卟啉分子从银上的分子层喷射到顶部的层上。这种重组可以通过热诱导NHC配体的解吸来逆转。我们预计，对这种质量传输过程的理解将对用卡宾对表面进行功能化具有至关重要的意义。
