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MO: Fachverband Molekülphysik
MO 10: Collisions and Reactions
MO 10.8: Vortrag
Mittwoch, 11. März 2020, 12:45–13:00, f142
Photochemical and spectroscopic investigation of highly soluble fluorinated TADF copper complexes — •Sophie Steiger1, Pit Boden1, Patrick Di Martino-Fumo1, Jasmin Busch2, Daniel Zink2, Florian Rehak3, Stefan Bräse2, Wim Klopper3, and Markus Gerhards1 — 1Physical Chemistry, TU Kaiserslautern, Germany — 2Organic Chemistry, KIT, Germany — 3Physical and Theoretical Chemistry, KIT, Germany
This contribution presents the investigation of fluorinated copper complexes capable for TADF (Thermally Activated Delayed Fluorescence) analyzed by time-resolved FTIR and emission (luminescence) spectroscopy. The highly soluble fluorinated complexes show good (photo)chemical stability in common solvents. With the help of emission spectroscopy, the stability was investigated and the energetic position of the excited states and their lifetime were determined. Furthermore, the TADF capability of the complexes in solids was investigated using temperature-dependent, time-resolved FTIR and emission spectroscopy. The measured spectra are compared and interpreted with (TD)DFT calculations, observing a clear TADF process at room temperature for all structures. A strong lifetime extension and a distinct redshift of the emission band around 20K confirm phosphorescence at low temperatures in contrast to the TADF process observed at room temperature.