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Pre-resonance Raman intensity studies of TCNQ and TCNQ−

✍ Scribed by Wayne T. Wozniak; G. Depasquali; Miles V. Klein

Publisher
Elsevier Science
Year
1976
Tongue
English
Weight
499 KB
Volume
40
Category
Article
ISSN
0009-2614

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✦ Synopsis

Pre-resonance Rarnan spectra have been obtained for TCNQ and KTCNQ in acetonitrile solution using an Ar*-Krf laser and a tunable rhodamine 6G dye laser. Using the theory of Albrecht and Hutley, we have cakulated frequency factors for the intensity variations for several symmetric vibrational modes of each molecule. The observed spectra for TCNQ and LiTCNQ with violet, blue, and green excitation give evidence for B-type resxtance enhancement due to vibronic mixing be- Ween at least t~vo violet and ultraviolet tiansitions. The Raman spectra for LITCNQ with yellow, orange. and red excitation show A-type enhancement due to a single electronic excitation in the near infrared.

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