US researchers image the first steps of photosynthesis
University of Michigan biophysicists have imaged the moment a photon excites colour pigments and sparks the first energy conversion steps of photosynthesis. Using 2D electronic spectroscopy, they identified a hidden state, or energy level, key to the initial charge separation and the sequence of steps leading up to it, which spanned over a few picoseconds (a trillionth of a second).