vis/NIR transient absorption spectrometer

• Subject Area: Chemical Solid State and Surface Research
• Term: Funded in 2021
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 458406921

With this project, the research focus “Light-Matter-Interactions” at the Institute for Physical and Theoretical Chemistry is expanded by the commissioning of a transient absorption spectrometer for the visible as well as the near infrared range. The working groups involved in the project will use the device to answer various questions in the field of the optical properties of molecular and solid-state materials using pump-probe spectroscopy. The investigated materials range from inorganic semiconductor nanocrystals to plasmonic nanoparticles and nanoclusters to transition metal and lanthanoid complexes, acene or perylene derivatives and organic boron / boron-nitrogen compounds. Ultra-fast electronic processes such as the transfer of hot electrons and relatively slow processes such as the decay of long-lived triplet states or the formation of highly reactive intermediate stages in photochemical reactions are examined. Research into this broad spectrum of materials and processes is guaranteed by a wide measurement time window of 150 fs to 400 µs and a large range of freely selectable wavelengths for the pump and probe beam between 350 nm and 1600 nm.The findings from these research projects will provide valuable information for the optimized application of the investigated materials in light-emitting diodes, optical switches and sensors as well as the elucidation of reaction paths to novel molecular compounds.

• DFG Programme: Major Research Instrumentation
• Major Instrumentation: vis/NIR transientes Absorptionsspektrometer
• Instrumentation Group: 5700 Festkörper-Laser
• Applicant Institution: Eberhard Karls Universität Tübingen
• Leader: Professor Dr. Marcus Scheele