Abstract

A series of electron transfer process of 7,7,8,8-tetracyanoquinodimethane (TCNQ) under external electric field was observed according to the ultraviolet-visible and Fourier transformed Raman spectra of TCNQ obtained with the self-made biservice electrochemistrical thin film cell for ultra-violet/Raman spectrometer in the present work. The concrete process refers to TCNQ turned into TCNQ^-, then into TCNQ^2- as well as the process of TCNQ^2- being oxidated into dicyano-p-toluoyl cyanide (DCTC^-) in the presence of oxygen under external electric field. The behaviors of some characteristic peaks, such as the one around 400 nm of TCNQ, around 700 to 900 nm of TCNQ^- and around 330 and 488 nm of TCNQ^2- at different circumstances were found according to the aforementioned spectra. Meanwhile, the interpretation of these peaks was presented in this study. This paper is valuable in pharmacokinetics, biomembrane and chemical sensor, etc.

Key words: Electron transfer, TCNQ, spectra, electric field.