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1H NMR spectra of the polymers: (a) P3HT, (b) 1 (Br–P3HT), (c) 3c, and (d) 4. The sharp peak at 6.98 ppm from 4-position proton (●) enables the estimation of the Li–Br exchange by comparison to the peak at 2.81 ppm from α–methylene (■) of the hexyl chain. For detailed integration values and peak locations, please refer to the Supporting Information.
