Resonance Raman (RR) excitation spectra have been measured for the v2, v4, v5, and v9 totally symmetric normal modes of the tetracyanoquinodimethane monoanion radical using the hybrid technique of resonance Raman spectroelectrochemistry (RRSE). A CW tunable dye laser was used as the excitation source in these experiments to cover an excitation region of 15 000 to 17 850 cm-1 within the 2B3g ⟶ 2B1u(1) transition of TCNQ·-. These spectra reveal a substantial amount of vibronic fine structure information. An analysis of the excitation spectra has been carried out leading to frequency assignments for the electronic structure sensitive v2′ (C≡N stretch) and v4′ (C=C ring stretch + C=C wing stretch) modes in the 2B1u(1) excited state.
ASJC Scopus subject areas
- Colloid and Surface Chemistry