Vibrational and Surface-Enhanced Raman Spectra of 1,6-Diphenyl-1,3,5-hexatriene

Vibrational and Surface-Enhanced Raman Spectra of 1,6-Diphenyl-1,3,5-hexatriene

The vibrational spectra and surface-enhanced Raman scattering (SERS) of 1,6-diphenyl-1,3,5-hexatriene (DPH) are discussed. The fundamental vibrational frequencies, overtones, and combinations observed in the infrared and Raman spectra of DPH are reported. The interpretation of the observed vibration...

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Veröffentlicht in:Applied spectroscopy 2007-09, Vol.61 (9), p.1001-1006
Hauptverfasser: Osorio-Roman, Igor O., Vargas, Victor C., Aroca, Ricardo F.
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Vargas, Victor C.
Aroca, Ricardo F.
description The vibrational spectra and surface-enhanced Raman scattering (SERS) of 1,6-diphenyl-1,3,5-hexatriene (DPH) are discussed. The fundamental vibrational frequencies, overtones, and combinations observed in the infrared and Raman spectra of DPH are reported. The interpretation of the observed vibrational spectra was supported by a complete geometry optimization, followed by vibrational frequency and intensity computations for the cis- and trans- isomers of the DPH using density functional theory at the B3LYP/6-31G(d,p) level of theory. Because the molecule is photo-chemically active on Ag metal surfaces, the best SERS results for silver islands were obtained at low temperature and low energy density of the exciting laser line. DPH SERS on Au films was obtained at room temperature.
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title Vibrational and Surface-Enhanced Raman Spectra of 1,6-Diphenyl-1,3,5-hexatriene
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