Kinetics. For kinetics study the samples were measured for 2 hours in such a way that the sample in a UV-vis cuvettes as described above was directly placed in a UVvis Go Direct® SpectroVis® Plus spectrophotometer with a fixed scan range of 380 nm to 950 nm. It takes only ca. 1-2 seconds to acquire the whole range. However, measurements below 400 nm and above 800 nm proved to be unreliable. Due to the relatively low resolution of the measurement, the data were then filtered prior to analysis using the Signal Processing Feature of the Origins software and the Adjacent Averaging method with a Point of Windows equal to 18, see Figure . The background was a mixture of alcohol and water together with the base with the same alcohol, alcohol content, base and base concentration as the sample considered. The background acquisition and the actual measurements were under stirring in a photobox (Puluz LED portable Photo Studio, PU5060EU, 60 cm x 60 cm x 60 cm, 60 W). HAuCl4 was added last. Spectra were recorded every 30 seconds with a first spectra 15 seconds after HAuCl4 was added.