Table 1.

Source and purity of the chemicals used in this work

Component	Source	Puritya	Analysis	Purification
Water	Our lab	−	Refractive index	Doubly distilled
Methanol	Vetec-Brazil	≥ 0.995	Refractive index	None
Ethanol	Vetec-Brazil	≥ 0.995	Refractive index	None
2-Propanol	Vetec-Brazil	≥ 0.995	Refractive index	None
Adipic acid	Sigma-Aldrich-Germany	≥ 0.995	None	Drying
Citric acid	Sigma-Aldrich-Japan	≥ 0.995	None	Drying
Nicotinic acid	Sigma-Aldrich-India	≥ 0.995	None	Drying

^aInformed by supplier