However, the precipitated powders of different PLVPs exhibited distinct excitation wavelengths. The emission wavelength of PLVP-1, PLVP-2, and PLVP-3 is around 465 nm, whereas the emission wavelength of PLVP-4 and PLVP-5 is about 400 nm (Figure and S19). The above results reveal that, as the powders of PLVPs were prepared by fast precipitation from non-solvent, the photophysical properties are expected to be influenced by their meta-stable structures.