Spectroscopic Investigations of Charge Transfer Salt VINΦ2(TCNQ)2

Abstract

VINΦ2(TCNQ)2 is a salt with two different, non-parallel TCNQ stacks. The polarized reflectance spectra from single crystals in the IR region 660-5200 cm-1, the powder absorption spectra 400-45000 cm -1 and FT—NIR Raman spectra of VINΦ2(TCNQ)2 are measured at room temperature. Moreover, the temperature dependence of powder absorption spectra in the frequency range 400-7900 cm -1 are studied. The nature of electronic bands, the anisotropy of optical conductivity, the temperature dependence of some vibrational bands and the charge distribution on different TCNQ stacks are discussed. PACS numbers: 71.38.+i, 78.30.Jw, 78.40.—q