Accession Number : ADA130570

Title :   Raman Studies of CuTCNQ: Resonance Raman Spectral Observations and Calculations for TCNQ Ion-Radicals.

Descriptive Note : Technical rept.,

Corporate Author : BROWN UNIV PROVIDENCE RI DEPT OF CHEMISTRY

Personal Author(s) : Kamitsos,Efstratios I ; Risen,William M , Jr

PDF Url : ADA130570

Report Date : 07 Jul 1983

Pagination or Media Count : 49

Abstract : The Raman spectra of thin film, and powered crystalline forms of CuTCNQ have been studied and analyzed in connection with their electronic spectra, and vibrational normal coordinate analysis and molecular orbital results. Non-resonance and resonance Raman conditions have been obtained by using different sample form and source wavelengths. Shifts of TCNQ and TCNQ vibrational frequencies from those of TCNQ(o) due to changes in the charge on the TCNQ moiety have been calculated in terms of molecular orbital parameters and TCNQ(o) vibrational frequencies. The resonance Raman enhancement of TCNQ(-) in the red band system is shown to be of Franck-Condon origin and its resonance Raman spectrum in this region is calculated. Transformation of CuTCNQ to TCNQ(o) with different laser lines is explained on the basis of photoinduced electronic transitions. (Author)

Descriptors :   *Raman spectra, *Resonance scattering, *Charge transfer, *Technetium, Optical switching, Phase transformations, Ions, Copper compounds, Transitions, Frequency bands, Band spectra, Silver, Lithium, Intensity

Subject Categories : Atomic and Molecular Physics and Spectroscopy
      Nuclear Physics & Elementary Particle Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE