Fig. 2. (A) Absorption spectra of PNVCL at different concentrations in THF. (B) PL spectra of PNVCL recorded at different excitation wavelengths λex. Concentration = 20 mg mL–1 in THF. (C) Fluorescence microscopy images of the PNVCL film obtained from the blue (420–460 nm), green (510–550 nm) and red (575–625 nm) emission channels, respectively. Emission spectra of the PNVCL film with different λex values are also included in each photograph. Scale bars = 50 μm. (D) The emission regions of fluorescent PNVCL in THF (black dot) and water (green dot) and in the solid state (red dot) assigned in the CIEx,y chromaticity diagram.
