Vibrational Overtone Spectra in Polymeric Thin Films

We’re sorry, something doesn't seem to be working properly.

Please try refreshing the page. If that doesn't work, please contact support so we can address the problem.


With the enhanced sensitivity of Photothermal Deflection Spectroscopy (PDS), vibrational overtone spectra have been obtained in organic thin films for the first time, covering the range from the near IR to the visible (0.4 - 2 eV). The absorption spectra of polycarbonate, for instance, exhibits C-I1 stretch modes for Δn> I where n is the vibrational quantum level. Previous measurements were constrained to either long fibers, which pose the problem of various scattering losses not related to absorption, or to a restricted wavelength region in the visible accessible by dye laser sources. The unparalleled sensitivity of PDS allows precise determination of frequency, lineshape and intensity of the various modes, even for films ≈10µm thick over a broad energy range. The overtone spectra can be used as a probe of various basic molecular properties. In a manner similar to NMR spectroscopy, it is possible to study specific atomic bonds.

This is a preview of subscription content, access via your institution.


  1. 1_R. Hayward and B.R. Henry, J. Mol. Spectry.57 p221 (1975).

    CAS  Article  Google Scholar 

  2. 2_R.L. Swofford, M.E. Long, and A. Albrecht, J. Chem. Phys.65 p179 (1976).

    CAS  Article  Google Scholar 

  3. 3_A. Skumanich and C. Moylan, Chem. Phys. Lett.174 p139 (1990).

    CAS  Article  Google Scholar 

  4. 4_W.B. Jackson, N.M. Amer, et. al., Applied Optics, 20 p1333 (1981); N.M. Amer in Semiconductors and Scmimnetals Vol.21, Part B, p83 (Academic Press NY 1984) Willardson and Beer editors; A. Skumanich and. J. C. Scott, Mo. Cryst. Liq. Cryst., 183 p365 (1990).

    CAS  Article  Google Scholar 

  5. 5_M. S. Child, Accounts Chem. Res.18 p45 (1985).

    CAS  Article  Google Scholar 

  6. 6_Reddy Iloller, and Berry, J. Chem. Phys.76 p2814 (1982).

    Article  Google Scholar 

Download references

Author information



Corresponding author

Correspondence to Andrew Skumanich.

Rights and permissions

Reprints and Permissions

About this article

Verify currency and authenticity via CrossMark

Cite this article

Skumanich, A., Moylan, C. Vibrational Overtone Spectra in Polymeric Thin Films. MRS Online Proceedings Library 228, 91–94 (1991).

Download citation