Solvent Effect on the Solid-Surface Fluorescence of Pyrene on Cellulose Diacetate Matrices

Table 1

Physical of the solvents used and their toxicity.

Solvent	T; °C	ρ; g/cm^3		μ  · 10^30,; C·m		β	α	LD50,; mg/kg
Water	100.0	1.000	78.3	5.9	1.000	-	1.17	-
Ethanol	78.3	0.7893	24.55	5.8	0.654	-	0.83	10300
Acetonitrile	81.6	0.7875	35.94	11.8	0.460	0.31	-	2460
DMSO	189.0	1.1004	46.46	13.5	0.444	0.76	-	20 000
Dioxane	101.3	1.0330	2.21	1.5	0.164	0.37	-	5170

values given by Reichardt [24]: T is the boiling temperature, ρ the density, the dielectric constant, μ the dipole moment, the empirical parameter of the solvent polarity, β, and α the Kamlet–Taft solvatochromic parameters (β is the hydrogen bond acceptor ability and α the hydrogen bond donation ability).