• 08.06.2022 / Graz

GÖCH Vortrag: The Wavelength Matters

Vortragender: Dr. Bartholomäus Pieber (Max-Planck-Institut für Kolloid- und Grenzflächenforschung)

Ort: HS H „Ulrich Santner“, Kopernikusgaase, 24, Erdgeschoss (NTEG230E)

Uhrzeit: 17:15 Uhr



Visible-light photocatalysis is a relatively young branch of organic chemistry that quickly became an integral part of the synthetic chemists’ toolbox. This results from the synthetic potential of photochemistry that allows unlocking unique reaction pathways unavailable to conventional ground-state reactivity. Photons are used as traceless, sustainable reagents to excite photocatalysts that ultimately induce reactions through energy-, and single electron transfer events with substrates, reagents or co- ca. talysts under mild conditions. However, most photocatalytic reactions rely on a small set of photocatalysts that are typically

activated with high-energy visible-light (<450 nm) to achieve efficient reactions.

The underlying theme of many research activities in the PieberLab is that light is more than just a traceless, sustainable reagent.

The energy (and intensity) of photons are overlooked parameters that can be used to gain control over the selectivity and to improve the reproducibility of light-mediated reactions. This, however, requires photocatalysts that broadly absorb over the visible- light spectrum. In this talk, I will give an overview about our research efforts towards new methodologies and photocatalysts that unravel the full potential of light for organic chemistry.

Bartholomäus (Bart) Pieber studied chemistry at the University of Graz and the Graz University of Technology (Austria). In 2015, he completed his PhD in the group of C. Oliver Kappe. Following his doctoral work, he moved to Peter H. Seeberger's lab (Potsdam, Germany) for postdoctoral research. In 2018, Bart started his independent research career as a group leader at the Max Planck Institute of Colloids and Interfaces. Since 2019, Bart is also a lecturer at the University of Potsdam. The research of his team focuses on the development of new catalytic strategies for organic synthesis using visible-light as energy source. This includes the development of new photocatalysts, designing new synthetic methodologies, and adapting enabling technologies, such as continuous flow chemistry."

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