Spectroscopic and Electrochemical Characteristics of TCNQF4 (2,3,5,6-tetraflo-7,7,8,8-tetracyanoquinondimethane)and Anions of TCNQF4

In this paper, solution and solid state methods for the identification of TCNQF4, TCNQF4.- and TCNQF42- redox levels (TCNQF4 = 2,3,5,6-tetrafluoro-7,7,8,8- tetracyanoquinodimethane) are described. UV–Vis spectroscopy and (cylic voltammograms) electrochemistry can be used for both qualitative and quantitative determinations of TCNQF4 and its anions at liquid state. UV-Vis spectra show highly characteristic absorption maxima ofTCNQF4and the anions. Electrochemical characteristic of TCNQF4 andanions in solution can be distinguished by comparing the voltammogram with zero current. Meanwhile,Infrared and Raman spectroscopies are very powerful for solid state identification. It shows that, the C≡N stretch shifts to lower energy as the negative charge on TCNQF4 increases and is a consistent and reliable indication of redox level for TCNQF4, TCNQF.- and TCNQF42-. Analogous strategies can also be applied to other TCNQF4 derivatives