Fig. 1. Solvent-dependent (a) UV-vis spectra; (b) PL spectra; (c) FTIR spectra in the N–H stretching region of NDI-PEP-L; (d) CD spectra of NDI-PEP-L and NDI-PEP-D; (e) 1H-NMR spectra of NDI-PEP-L (in the region of aromatic protons) at different % of D2O; (f) AFM image of NDI-PEP-L in H2O. [C = 0.01 mM for UV-vis, PL, CD, and AFM and C = 1 mM for FTIR and NMR studies].
