Effect of Phosphoric Acid Concentration on the Optical Properties of Partially Phosphorylated PVA Complexes

Figure 3

PL spectra of pure PVA and PPVA samples prepared with a mole ratio of 0.3 at five excitation wavelengths: (a) 272; (b) 300; (c) 350; (d) 400; and (e) 500 nm.