Résumé
The use of visible light to drive organic reactions has revolutionized synthetic chemistry. The field is dominated by catalysts that absorb in the 400-450 nm range, wavelengths that correspond to 63- 70 kcal/mol. Such high energy light is not tolerated by certain functional groups and catalytically generated intermediates. We have developed a suite of catalysts that absorb in the 550-750 nm regime by taking advantage of a spin forbidden excitation to deliver triplet energies as high as most higher energy absorbing catalysts. Catalyst development and synthetic applications will be discussed.
