Fig. 1.

(a) UV–vis absorption spectra of TPEPy-I and TPEPy-PF6 nanoaggregates in the DMF-water mixture with 99.75% water content. (b) Normalized photoluminescence excitation (PLE) spectra at 467 nm (left) and PL emission spectra at 652 and 663 nm (right) of the TPEPy-I and TPEPy-PF6 nanoaggregates, respectively, in DMF-water mixture with 99.75% water content. Emission wavelengths of TPEPy-I and TPEPy- PF6 nanoaggregates were 652 and 663 nm, respectively. The excitation wavelength was 467 nm for both cases. (c and d) Particle size distribution of (c) TPEPy-I and (d) TPEPy-PF6 nanoaggregates in DMF-water mixture with 99.67% water content measured by DLS.