Conformationally controlled thermally activated delayed fluorescence in a nitro-substituted phenothiazine: a combined spectroscopic and kinetic study.
Thermally activated delayed fluorescence (TADF) can convert triplet excitations into emissive singlet states through reverse intersystem crossing (rISC), but nitro groups usually promote nonradiative decay. Here, the photophysics of 4'-nitro-10-phenylphenothiazine (NPh-PTZ) was investigated by steady-state and time-res...