The synthetic dye cis-[Ru(dcbH2)2(NCS)2], named N3, was prepared and purified following the procedure reported in literature. [41] and used as a standard in all measurements.
Calafate fruits in sugar syrup or skin of fresh Jaboticaba fruits were employed in the preparation of natural extracts, which were used as dye sources without further purification. For experiments recently performed with solar simulator, at least, a year conserved fruits were employed.
Aqueous extracts of Jaboticaba were prepared by crushing the skins of the previously washed fruits. Alternatively, the mixture can also be boiled for further extraction