Fig. 2: The switchable behavior on the steady-state photophysical properties and proton nuclear magnetic resonance spectroscopy (1H NMR).
From: Reversible gating of singlet fission by tuning the role of a charge-transfer state
a Changes of absorption and (b) the corresponding fluorescence of mPh(Tc-Py)2 in toluene (1 × 10–5 m) upon the addition of TFA (from 0 to ca. 400 equivalents); dotted black line is after subsequent addition of TEA (ca. 420 equivalents). c Comparison of the aromatic region of 1H NMR spectra of Ph(Tc-Py) upon adding an excess of TFA and an excess of TEA in C6D6; proton signals of pyridyl/pyridinium group are labeled as Ha. Source data are provided as a Source Data file.
