2.9 Ultraviolet-Visible (UV-Vis) Spectroscopy UV-Vis experiments were performed on a JASCO V-750 UV-Vis spectrometer (JASCO UK Ltd., Heckmondwike, UK) equipped with a JASCO CTU-100 water jacketed Peltier thermostat system at a wavelength of 320 nm and a temperature of 25°C. A standard curve for IND was obtained by quantifying known amounts (Supporting Information, Figure ). Data was analysed using Origin software.