Diamond quantum sensors for photo- and spin chemistries

Quantum sensing with the nitrogen–vacancy (NV) center in diamond enables nanoscale NMR and EPR spectroscopies at the single- to few-molecule regime. In particular, NVs can be used to investigate photogenerated spin-correlated radical pairs (SCRPs) by tracking charge separation and recombination, spin dynamics, and polarization attributed to chirality-induced spin selectivity (CISS). NVs could thus provide insight into the complex spin dynamics hosted in systems ranging from biologically relevant proteins to molecular qubits for quantum information science. Here, I demonstrate detection of photogenerated SCRPs with single NVs and show how molecular chirality influences the spin dynamics of SCRPs due to CISS.