Infrared spectroscopy

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it is about ir spectrocopy with applications

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Infrared spectroscopy

  1. 1. Infrared Spectroscopy Terry A. Ring Chemical Engineering University of Utah
  2. 2. Molecular Vibrations <ul><li>Mass on a spring </li></ul><ul><li>Vibration Frequency </li></ul><ul><li>ν=c/λ </li></ul><ul><li>Wave number =1/ λ </li></ul>
  3. 3. Spectrometer <ul><li>Single Beam </li></ul><ul><li>Dual Beam </li></ul><ul><ul><li>with Reference </li></ul></ul><ul><li>Gas, Liquid & Solid </li></ul><ul><li>Sample Cells </li></ul><ul><li>Powder mixed with KCl to make pellet </li></ul><ul><li>Reflection off surface of Sample </li></ul><ul><li>Attenuated Total Reflection </li></ul>Sample Sample
  4. 4. Spectrum <ul><li>Peak Identification </li></ul>
  5. 5. Spectrum <ul><li>Peak Identification </li></ul><ul><ul><li>Valence Vibrations </li></ul></ul><ul><ul><li>Bending Vibrations </li></ul></ul>
  6. 6. Peak Identification
  7. 7. Fourier Transform IR <ul><li>Mixing light from </li></ul><ul><ul><li>Fixed mirror </li></ul></ul><ul><ul><li>Moving mirror </li></ul></ul>
  8. 8. Raman Spectroscopy <ul><li>Laser Light Illumination </li></ul><ul><li>Scattered Light Spectra Observed </li></ul>

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