Photoredox catalysis by well-known ruthenium(II)
polypyridine complexes and appropriate cyclometalated iridium(
III) derivatives is a useful tool for redox reactions in synthetic
chemistry, because these materials can effectively catalyze singleelectron-
transfer (SET) processes by irradiation with visible light.
This provides a new strategy for efficient and selective radical reactions.
We have developed several photocatalytic reactions in which
organic radicals are generated by photoredox catalysis and which
have remarkable merits in terms of green and sustainable chemistry.