Fig. 5. Normalized TRIR spectra of l-P2+˙ (a) and c-P6·T6+˙ (b) with pump centered on C C stretch mode (2100 cm⁻¹) (black) and on P₁ polaron band (3250 cm⁻¹ for l-P2+˙, 2500 cm⁻¹ for c-P6·T6+˙) (red) with probe delay 0.8 ps. Anisotropy values of the selected TRIR regions (greyed area in the spectra) of l-P2+˙ (c) and c-P6·T6+˙ (d) are plotted for both pump positions, with error bars indicating standard error.