Figure 3
Generation of nuclear hyperpolarisation via the solid-state photo-CIDNP mechanism on the primary donor, the Special Pair P (red and blue), as well as on the primary acceptor ΦA (yellow) in quinone depleted bacterial RC. The phytyl chains are omitted for sake of clarity. After light excitation of P (A), an electron is transferred to the ΦA forming a spin correlated radical pair (SCRP) (B). In this state, nuclear hyperpolarisation is generated which can be observed in the electronic ground-state after recombination (C) (for details, see main text). Hyperpolarisation of P and ΦA is accumulated by a series of photocycles and decays by nuclear T1 relaxation (A/D).
