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Applied Spectroscopy

Applied Spectroscopy


  • Vol. 52, Iss. 4 — Apr. 1, 1998
  • pp: 523–527

UV-Visible and Inelastic Electron Tunneling Spectroscopies of Brevetoxins

J.-L. Brousseau, N. Vibet, R. M. Leblanc, K. S. Rein, and D. G. Baden

Applied Spectroscopy, Vol. 52, Issue 4, pp. 523-527 (1998)

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We have studied the UV-vis and vibrational spectra of the brevetoxins PbTx-2, PbTx-3, PbTx-9, and 2, 3, 27, 28, 41, 43-hexahydro(reduced) PbTx-3. The absorption at 194 nm ( epsilon 18 000 L mol-1 cm-1) of PbTx-2 and PbTx-3 is assigned to the pi - pi * transition of the lactone conjugated double bonds. The n - pi * transition of the lactone is seen at 239 nm ( epsilon 2 800 L mol-1 cm-1). The absorption band at 208 nm for PbTx-2 is assigned to the conjugated double bonds of the aldehyde function located on the K-ring side chain. The inelastic electron tunneling spectra of PbTx-2, PbTx-3, PbTx9, and fully reduced PbTx-3 are presented and the vibrational bands are assigned. We show that inelastic electron tunneling spectroscopy can be used to monitor and measure the vibrational fingerprint of the brevetoxins at a level as low as 1 ng.

J.-L. Brousseau, N. Vibet, R. M. Leblanc, K. S. Rein, and D. G. Baden, "UV-Visible and Inelastic Electron Tunneling Spectroscopies of Brevetoxins," Appl. Spectrosc. 52, 523-527 (1998)

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