Near infrared electronic spectrum of TCNQ mono-valent anion

Abstract

The high resolution near infrared electronic spectrum of TCNQ anion dissolved in 2-methyltetrahydrofuran glass at 77 K has been determined. The absorption bands are interpreted as simple progressions of two molecular vibrations in a single electronic excited state with ν00 = 11661 cm-1. The molecular vibrations (ω′1 = 1264 ± 3 cm-1, ω′2 = 335 ± 3 cm-1) of the vibrational progression agree well with observed Raman active transitions. The experimental data do not require the presence of two electronic transitions in the 1.3 to 2.1 eV region, contrary to what had been assumed previously on the basis of less well resolved room temperature spectra. © 1976.