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

Table 2

Photoluminescence data for pure PVA and PPVA with five mole ratios (0.1, 0.2, 0.3, 0.4, and 0.5) at three excitation wavelengths (300, 350, and 400 nm).

Excitation wavelength (nm)	Samples (mole ratio)	Band position (nm)		Intensity	Assignment
300	Pure PVA	412		70	s-PVA
	0.1	398		225	i-PPVA
	0.2	396		230	i-PPVA
	0.3	391		270	i-PPVA
	0.4	389		285	i-PPVA
	0.5	389		295	i-PPVA
350	Pure PVA	418	440	148,148	s-PVA	a-PVA
	0.1	418	441	245,248	s-PPVA	a-PPVA
	0.2	421	444	235,225	s-PPVA	a-PPVA
	0.3	429	442	305,280	s-PPVA	a-PPVA
	0.4	421	443	315,300	s-PPVA	a-PPVA
	0.5	420	446	400,360	s-PPVA	a-PPVA
400	Pure PVA	462	500	135,150	i-PVA
	0.1	462	489	125,115	i-PPVA
	0.2	460	485	125,115	i-PPVA
	0.3	468	481	180,160	i-PPVA
	0.4	462	482	199,175	i-PPVA
	0.5	461	481	265,235	i-PPVA