Fig. 5: PZDN → PZDQC photoisomerization and PZDQC → PZDN reverse thermal (or catalytic) isomerization. | Nature Communications

Fig. 5: PZDN → PZDQC photoisomerization and PZDQC → PZDN reverse thermal (or catalytic) isomerization.

From: A new approach exploiting thermally activated delayed fluorescence molecules to optimize solar thermal energy storage

Fig. 5

a Illustration of the reactions. b Time-dependent 1H NMR spectrum of PZDN → PZDQC photoisomerization in cyclohexane-d12 upon exposure to a metal halide lamp with a bandpass filter between 350 and 450 nm. c 1H NMR spectrum of PZDQC → PZDN thermal isomerization by heating at 95 °C as a function of time (in toluene-d8). Note that (b) and (c) are in different solvents (see text for the explanation), cyclohexane-d12 and toluene-d8, respectively, resulting in slightly different 1H NMR peak positions. The blue and red arrows indicate the characteristic peaks for NBD and QC, respectively.

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