Long-lived charge separated state and thermally activated delayed fluorescence in anthraquinone-phenoxazine electron donor–acceptor dyads

Abstract

Long-lived charge separated (CS) triplet state (2.6 μs) and thermally activated delayed fluorescence (TADF) [τ = 282 ns (90.4%)/2.4 μs (9.6%)] were observed in an anthraquinone-phenoxazine electron donor–acceptor dyad via the electron spin control method, and emissive ¹CS and non-emissive ³CS states were discriminated via nanosecond transient absorption spectroscopy and global analysis.