Vibrational spectra of the industrial dyes cresyl fast violet, phloxine B and saffron. Intensity studies by surface-enhanced Raman spectroscopy
The vibrational spectra, Fourier transform Raman, Fourier transform infrared, and surface-enhanced Raman scattering (SERS) spectra of the dyes cresyl fast violet, phloxine B, and saffron have been recorded and analyzed. The intensity of the intense SERS peak of the aromatic ring vibration at 1495 cm-1 in phloxine B, and the intense 592 cm-1 peak due to CCC and CMC in plane skeletal deformation frequency has been studied as a function of the analyte concentration of these two dyes. Quantitative calibration curves for cresyl fast violet and phloxine B are presented. Limits of detection of these two dyes by SERS are reported. All the three dyes give fluorescence-free SERS spectra. © Elsevier.
Narayanan, VA; Stokes, DL; Vo-Dinh, T
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