Donatas Zigmantas

TL;DR: Results indicate that energy transfer from chlorophyll molecules to a chlorophyLLzeaxanthin heterodimer, which then undergoes charge separation, is the mechanism for excess energy dissipation during feedback deexcitation.

TL;DR: The role of coherence in determining the efficiency of charge separation in the plant photosystem II reaction centre is elucidated by comprehensively combining experiment (two-dimensional electronic spectroscopy) and theory (Redfield theory) and it is proposed that this coherent mechanism will inspire the development of new energy technologies.

TL;DR: The data reveal the crucial role of vibrational degrees of freedom coupled to electronic excitations that facilitate the mixing of multiexcitonic states with singlet excitons and show how the formation of vibronic manifolds with a high density of states facilitates fast and efficient electronic processes in molecular systems.

TL;DR: It is demonstrated that interexciton coherences are too short lived to have any functional significance in photosynthetic energy transfer and this work revise the interpretation of coherence signals in photosynthesis systems and leads to a more detailed understanding of the quantum aspects of dissipation.

TL;DR: A method for determining the energy of the forbidden S1 state, on the basis of ultrafast spectroscopy of the short lived level, revealed the location of the intermediate level in two carotenoid species involved in the xanthophyll cycle, zeaxanthin and violaxanthIn, and yielded surprising implications regarding the mechanism of photoregulation in photosynthesis.