Reagents of the purest grade available were purchased from Sigma-Aldrich and used as received.
All electrochemical measurements and characterizations were carried out with a BASI PWR-3 power module and a standard three-electrode EF-1085 C-3 cell with a glassy carbon (0.02 cm2 geometrical area) electrode as the working electrode, a platinum wire as auxiliary electrode and a Ag/AgCl/NaCl (3 M NaCl saturated with AgCl) reference electrode.
Due to its photoreactivity [6], the synthesis and manipulation of LSD were carried out in a dark environment.
Standards (in dimethylformamide: DMF) were prepared daily from a 1000 mg L−1 stock solution (in DMF), stable for at least 1 week when conserved at –18 °C, and stored in the dark.
Electrochemical potentials are referred to Ag/AgCl/NaCl (3 M NaCl saturated with AgCl). An Orion SA 520 pH meter was used for pH measurements.
In the following, the uncertainty on the last digit has been reported in brackets, when appropriate.
Please notice that LSD tartrate was used for this study, but quantity reported below refer to the free base.