Regensburg 2022 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 79: Surface Reactions and Heterogeneous Catalysis 3

O 79.7: Vortrag

Freitag, 9. September 2022, 12:15–12:30, H4

Photoactivation of Azide in SURMOFs — •Jimin Song, Xiaojuan Yu, Manuel Tsotsalas, Alexander Knebel, Alexei Nefedov, Stefan Heissler, Yuemin Wang, and Christof Wöll — Institute of Functional Interfaces, Karlsruhe Institute of Technology,76344, Eggenstein-Leopoldshafen, Germany

The ability to turn the surface activation of metal-organic frameworks (MOFs) is essential for developing advanced MOF applications. Here, we have successfully synthesized a surface-mounted MOF (SURMOF) model system with azide side groups in order to investigate the photoactivation of phenyl azide and its reaction pathways. In situ UHV infrared reflection absorption spectroscopy (IRRAS) was applied to precisely monitor the chemical changes taken place on the surface of highly oriented and crystalline SURMOFs under UV irradiation at different temperatures. Combining with in situ XRD, MS and XPS, a two-step mechanism is proposed including the activation and subsequent reaction of azide with adjacent C=C bonds yielding pyrrole species.