Fig. 4From: The role of molecular oxygen (O2) and UV light in the anion radical formation and stability of TCNQ and its fluorinated derivativesa–f Comparative electronic absorption spectral evolution of a–c F2TCNQ and d–f F4TCNQ in a, c air-equilibrated, b, d degassed EtOH as a function of UV-illumination time, and those in c, f air-equilibrated EtOH as a function of time without UV-illuminationBack to article page