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

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)

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Document Details

Document Type
Technical Report
Publication Date
Jul 07, 1983
Accession Number
ADA130570

Entities

People

  • Efstratios I. Kamitsos
  • William M. Risen Jr

Organizations

  • Brown University

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Absorption Spectra
  • Charge Transfer
  • Chemistry
  • Distortion
  • Electric Fields
  • Electrical Properties
  • Electromagnetic Fields
  • Frequency Shift
  • Materials
  • Optical Materials
  • Raman Spectra
  • Raman Spectroscopy
  • Scattering
  • Spectra
  • Spectroscopy
  • Thin Films
  • Visible Spectra

Readers

  • Materials Science and Engineering.
  • Molecular Photonics/Laser Physics

Technology Areas

  • Directed Energy
  • Microelectronics
  • Space