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. 2025 Jan 4;16:396. doi: 10.1038/s41467-024-55369-6

Fig. 3. Optoelectronic and electrochemical properties of the polymers.

Fig. 3

a Normalized UV-vis-NIR absorption spectra of P(TII-T), P(TII-2FT), and P(TII-2ClT) in thin film. Electrochemical absorption spectra of P(TII-2FT) with b positive voltages (0 to +0.8 V) and c negative voltages (0 to −0.8 V) on ITO glass in 0.1 M NaCl aqueous solution. The ΔAbs. represents the difference in absorption intensity at various bias voltages. d Calculated ΔEST and y0 values of the polymers. The y0 value, ranging from 0 (closed-shell) to 1 (pure diradical), can be used to evaluate the diradical characteristic. e Comparison of the room-temperature EPR signals of the three polymers with P(gTDPP2FT) in the solid state. f Variable-temperature EPR signals of P(TII-T) in the solid state from 5 K to 70 K.