Fig. 3. Optical and electrochemical properties of polymers.

a Photoluminescence spectra were obtained in suspensions (5 mg photocatalyst in 10 mL solution mixture consisting of equal volumes of H₂O, MeOH, and TEA). b Time-resolved photoluminescence spectra were obtained in suspensions (5 mg photocatalyst in 10 mL solution mixture consisting of equal volumes of H₂O, MeOH, and TEA). Samples were excited with a 405 nm laser and emission was measured at 455 nm. c EPR spectra were collected in the solid state under additional light illumination. d Electrochemical impedance spectra of polymers were carried out in dark with an AC potential frequency ranging from 0.1 Hz to 100 kHz. In the equivalent circuit, R_s represents the circuit series-resistance, R_ct is the charge transfer resistance across the interface, and C_dl is the capacitance phase element of the semiconductor-electrolyte interface. e Photocurrent were generated upon light on-off switching. f Wide-angle X-ray scattering profiles of PFBPO and P-HEG-10 were measured in a mixture solution consisting of equal volumes of H₂O, MeOH, and TEA.