Fig. 2: Nonconventional fluorescence properties of PU-UPy.
From: Non-traditional fluorescence in quadruple hydrogen bonded supramolecular polymers
a Photoluminescence spectra of PU-UPy film sample (excited at different wavelength). b Normalized UV absorption and excitation spectra of PU-UPy (Solid state). c PLQY of PU-UPy film measured using an integrating sphere. The PLQY value is 52% upon excitation at 365 nm. d QY comparison of PU-UPy with some non-traditional fluorescence systems reported. e Radar chart of PU-UPy compared to blank sample PU-b. f CPL spectra of PU-UPy film. g, h PL spectra of PU-UPy in DMF and CHCl3 with different concentration. I and II represent the emission peaks corresponding to different strrutures. i Excitation-dependent PL spectra of PU-UPy in DMF (10−3 M).
