Tuning the Electrochemical and Photophysical Properties of Osmium-Based Photoredox Catalysts

Abstract The use of low-energy deep-red (DR) and near-infrared (NIR) light to excite chromophores enables catalysis to ensue across barriers such as materials and tissues. Herein, we report the detailed photophysical characterization of a library of Os II polypyridyl photosensitizers that absorb low...

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Published in:Synlett 2022-02, Vol.33 (3), p.247-258
Main Authors: Goldschmid, Samantha L., Bednářová, Eva, Beck, Logan R., Xie, Katherine, Tay, Nicholas E. S., Ravetz, Benjamin D., Li, Jun, Joe, Candice L., Rovis, Tomislav
Format: Article
Language:English
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Summary:Abstract The use of low-energy deep-red (DR) and near-infrared (NIR) light to excite chromophores enables catalysis to ensue across barriers such as materials and tissues. Herein, we report the detailed photophysical characterization of a library of Os II polypyridyl photosensitizers that absorb low-energy light. By tuning ligand scaffold and electron density, we access a range of synthetically useful excited state energies and redox potentials. 1 Introduction 1.1 Scope 1.2 Measuring Ground-State Redox Potentials 1.3 Measuring Photophysical Properties 1.4 Synthesis of Osmium Complexes 2 Properties of Osmium Complexes 2.1 Redox Potentials of Os(L) 2 -Type Complexes 2.2 Redox Potentials of Os(L) 3 -Type Complexes 2.3 UV/Vis Absorption and Emission Spectroscopy 3 Conclusions
ISSN:0936-5214
1437-2096
DOI:10.1055/s-0041-1737792