Singlet Fission-Based Spin-State Switching in Germanium Diadicals - SFS3

• Applicants: Professor Dr. Benjamin Dietzek-Ivansic; Professor Dr. Alexander Kühne; Professorin Dr. Sabine Richert
• Subject Area: Inorganic Molecular Chemistry - Synthesis and Characterisation ; Organic Molecular Chemistry - Synthesis and Characterisation ; Physical Chemistry of Molecules, Liquids and Interfaces, Biophysical Chemistry
• Term: since 2025
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 560728312

Within the framework of the SPP Priority Program Interactive Spin-State Switching the project SFS3 takes a unique vantage point in utilizing singlet fission as a mechanism to couple two germanium centered electron spins within one molecule. Coupling of the generated pairs of triplets through singlet fission to the germanium spin centers will enable photo-induced electron spin entanglement over comparably long distances. This approach will lead to long-lived high-spin states within a single molecule. We will also investigate the effect of different connectivities and charge transfer states in our molecules, when we excite the singlet fission bridge and/or the germanium spin centers individually. As part of the SPP, we will also investigate other metal complexes in conjunction with our singlet fission photo-switches, thereby realizing novel molecular spin materials with new switching dynamics that will be characterized spectroscopically.

• DFG Programme: Priority Programmes
• Subproject of: SPP 2491: Interactive Spin-State Switching